TRX250R.ORG
Workshop => Carburetor, Intake, and Exhaust => Topic started by: troybilt on June 26, 2015, 09:57:20 AM
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Is there any no-link bikes in the Kansas area that could be used for intake development? (might just have to buy another 250R!)
Thanks,
Troy
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That is definitely an area that could use the attention of someone with your skills.
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I have a full intake and airbox built for my no link Arens by HRE. I'm in NewJersey but could send it to you this fall / winter if you want to experiment more with it... The problem with the Arens no link system is that the upper rear shock mount is in the stock location and has some pretty good width which makes clearances a P.I.T.A. unlike other no link frames that have the upper shock mount relocated to a higher position.
The box is a copy of a 89 that has changed areas for shock clearance. The intake tube is all 2.5" aluminum pipe that has been cut/welded to run from the airbox to carb and clear thr shock.
Its a good system, I'm just not sure if a tapered intake tube that is larger by the filter and goes down do the 2.5" to fit around the shock and clear the upper shock mount would net better performance gains, or if the 2.5" continuous tube flows good enough (dont have a dyno).
Anyway I will post pictures in a little bit.
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Sorry, I'll be of no help for a no-link, but I'm PCSing to Ft. Riley in August, and I have a CR500 link Laeger's if you need one. I'm not sure if the upper shock mount is different vs. a stock link. I haven't been on here in a long time because I'm still in Korea, so I'm trying to re-learn some of the 250R specific info.
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Awesome sounds good! Yea I have alot of the CR500 linkage geometry already as my last 2 laegers were both CR500 linkage. I scanned the frame into CAD, but I might have have you help me with some fit-up stuff etc, since you'll be close.
Thanks Deuce, I'll catch upto you this fall/winter during the offseason on that, that might be a good start.
I've actually got most of the CR500/Stock setup done, as far as the intake. Just need to do some flow bench and dyno testing with it now.
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If you need a stock framed 250R for some dyno testing, i would gladly haul mine up to you! I'm only a couple hours away.
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I can give you any dimensions you need Troy.
Fitting the intake around the shock doesn't look like it would be the issue on mine (I still use a stock boot to reach my airbox, plenty of clearance)
The airbox hitting the shock is what my problem is. My Pro-Tect airbox fixed that problem. But god is it a mess to put together
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Awesome thanks! My goal was to get use the same intake but have 2 different variations of box designs depending on No-Link vs. stock/CR500. The box designs would follow my other design formats that I've done for the YFZR and TRX450r, basically they can be run as an airbox "eliminator" or fully enclosed box. Can be configured either way.
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The only problem I see with the no link is that they vary from manufacturer to manufacturer in their geometry and design, unlike the cr500 link which to my knowledge is generally the same across makers.
The problems I had with my Arens are unlikely to be the same as other bikes unless you are running a stock frame with a roll swingarm.
I tried different intake boots (stock, lt500, yfz) and each had a different issue with the fitment (either getting hit by the rear shock or wouldnt fit right through the frame). The airbox also had to be designed to be set back further and have a different angle for the shock to clear.
Now on a lobo if i am not mistaken you can use the entire stock intake system but you just need a small extension to run from the intake boot to carb.
So you may want to consider a box design that is adjustable to fit a broader spectrum of chassis'. Also have the intake tube more like a yfz but longer to give more shock clearance as the rear shock changes angles through its travel. The yfz tube fit the best of the three honestly until we said screw it and made one.
Sorry I still havent dug the bike out and snapped some pics but I will
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If only you were closer to Michigan. I have a stock frame with roll no link, and a lonestar no link and a lrd no link. I could use some help with the lonestar and could improve on the stock frame.
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Us lobo owners need this lol. I'd let you use my lobo chassis if I was closer.
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I bought a 3d printer so I can send designs out for test fitment and iterate designs that way. I'm going to be doing all the mfg in house so I can control costs. More to come soon.
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I'm still interested in one for my CR500 link Laeger - stock airbox 38pwk.
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Very cool Troy,
I'll have pics of my setup by this weekend or once I get a free minute between work and catching up on everything else...
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I think Deuce summed it up, not sure there will be a "one size fits all" for every no link setup. I used the Pro Tec box for my LSR frame, and I had to move the box back about two inches. The box itself wasn't the issue, I used a OEM intake tube, and without the box moved back, the shock spring would have rubbed on the tube. I had to move the box back so the narrower part of the intake tube was adjacent to the shock.
My other issue was since I moved the box back, I had to cut out a large portion of the rear of the box for brake caliper and swing arm clearance when the suspension was fully compressed. I think if I could have left the box forward, I probably could have left a large portion of the box intact.
Troy, let me know if I can help in anyway. I can live with my current intake setup, but would love a better setup.
Doug
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Here's my current intake setup on the Laeger. Pro-Tect airbox (designed for LSR frame), 86 OEM boot, metal pipe, 2" diameter rubber hose to connect metal pipe and carb, sphynx cylinder, vforce, UPP boot, 38mm PWK
You can see how one of the front mounts doesn't line up. I think the LSR subframe is narrower in this section
(http://i1060.photobucket.com/albums/t457/tbone0785/TRX250R/20150701_202515_zpso3xicywu.jpg)
(http://i1060.photobucket.com/albums/t457/tbone0785/TRX250R/20150701_202537_zpsnuabcw9f.jpg)
Plenty of clearance for the rear shock even when I stood on the grab bar (240 lbs)
(http://i1060.photobucket.com/albums/t457/tbone0785/TRX250R/20150701_202640_zpsmpqe6xll.jpg)
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TBONE, how does the LT500 boot fit? I was curious if fit any better or worse? It would still need an extension like the stock. Where the indentions are on the stock intake tube are pretty much pointless, since they are there to clear the stock frame... If you don't have one, I could send you one and we can see how "far" off it is then use it as a baseline for a new intake. Just looking at the pics, I was originally going to use my intake I just created but I think the LT500 might be a better starting point.
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TBONE, how does the LT500 boot fit? I was curious if fit any better or worse? It would still need an extension like the stock. Where the indentions are on the stock intake tube are pretty much pointless, since they are there to clear the stock frame... If you don't have one, I could send you one and we can see how "far" off it is then use it as a baseline for a new intake. Just looking at the pics, I was originally going to use my intake I just created but I think the LT500 might be a better starting point.
I haven't even bothered to try the LT500 boot, simply because my airbox uses the OEM 250r boot.
I'd be more than willing to try the LT500 and/or the intake you created and test fitment for you
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Tbone, here is a start of the layout of the design. This is an overlay with the one I did for the CR500 and Stock link bikes. (Similar to stock). I was curious how much longer the intake tube is (extension)?
I also tried to move the filter (inlet) side of the intake more to the center, so the filter doesn't sit at such an angle. I may have to go back to a smaller filter so the brake doesn't hit the box, since these are much farther back in sub then stock and CR500 linked bikes.
(http://i1345.photobucket.com/albums/p669/robl-engineering/TRX250R%20and%20Hybrid%20Velocity%20Intake/no-link_comp1_zpsrbmojxi8.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/TRX250R%20and%20Hybrid%20Velocity%20Intake/no-link_comp1_zpsrbmojxi8.jpg.html)
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I was also wondering if you could take a side pic from the left side of your bike. I thought there was one on here but I couldn't find it.
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Here's an older one with no engine installed. I can take a better one tonight after work if you need. Bike is all together now
The extension i'm using is about 2.5" long, i'll take a more accurate measurement after work. There's a lot of combinations of intake boots, carbs, and manifolds. It would be tough to make it a one size fits all application
(http://i1060.photobucket.com/albums/t457/tbone0785/Laeger%20No-Link%20Frame/P1050292_zps3e4a8327.jpg)
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True but we'll start with your no-link and work from there on others.
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Is your plan to make your boot clamp directly to the carb? Or will there be a connecting piece of rubber hose?
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the intake would fit right up against he carb, there a rubber boot with 2 hose clamps to join them.
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Please forgive me. I don't want to say anything negative.....TBONE you have the ultimate no-link set up. Raised upper shock mount. ADJUSTABLE...lower mount and the shock moved far enough to the side that you could drive a trophy truck between the frame rail and the shock.
Troy, you seem to be on the path to something that a lot of no link 250r riders really need. You have the smarts and the tools to make the intake boot that is needed for a no link set up with the upper shock mount in the stock location and centered in the frame with enough clearance at the air box for the shock to swing waaaay back.
If I am off base please respond with two words "YTMAN you are way the efff off base"
I have figured out a system that clears everything through the cycle of travel and has no air gaps between the air filter and the carb but I'm sure there is a better alternative, especially in the performance department. Everything seems to either rub on the frame, the shock, or need 27 hose clamps and a couple more trips to Lowes.
I'll post a couple of pics of my P.O.S. if it will help.
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Yes please do. I'm drawing one up now. Would like a pic from top and one from left side, then anything else that maybe important. It's going to be a challenge to design based on pics so there will be some trial and error, but saves me from trying to locate a local no link.
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Looks like Tbone07's setup the offset shock was quite the advantage, looks like that is what saved him from having to move the box back. LSR's shock is dead center, not sure about Roll. If I can remember, I will take some pics of my setup this weekend and post them in this thread.
Doug
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(http://forums.trx250r.org/vbulletin_imports/172_5880_2017-04-18_589.jpg)(http://forums.trx250r.org/vbulletin_imports/172_5881_2017-04-18_1115.jpg)(http://forums.trx250r.org/vbulletin_imports/172_5882_2017-04-18_9053.jpg)(http://forums.trx250r.org/vbulletin_imports/172_67_2017-04-18_2760.jpg)(http://forums.trx250r.org/vbulletin_imports/172_5883_2017-04-18_103.jpg)(http://forums.trx250r.org/vbulletin_imports/172_5884_2017-04-18_6604.jpg) This set up is on a cr500 motor but the carb outlet is in the same place as my 250r.
The stock boot actually wound it's way between the frame and the shock a little nicer up front but the shock moves so far fore and aft that it hits the boot in front and back.
This is the lt500 boot with the adapter in back and a spacer in front. It's mashed up against the frame at the shock but at least it doesn't hit any moving parts.
This is a Laeger frame with stock upper shock mount and a Roll no link swinger. I don't know the shock length.
Tbone, those are awesome pictures. I wish I was home right now so I could take some better shots. I'm limited to what's on my computer.
Troy, you're definitely gonna need a real world model to work from. I wish it could be mine.
Oh yeah... Thanks for the brake line clamp mount idea Troy.
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Awesome thanks ytman! ....I thought that airbox mounting system looked familiar.. LOL!
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I wish I had a pic looking toward the carb from the back. The boot needs to be a tall skinny snake to get through there without hitting anything.
Troy, Lemme axe you a question. "would this help" Now lemme explain.
My next step, based on my limited experience in parts creation. C'mon 3d aluminum printers!!!!!!holy crap. Was going to be to sculpt a solid boot out of foam and wrap it with casting tape, as in plaster. That would make 1 part but the model would be destroyed to get the part....If a plaster/fiber casted boot, like broken arm cast///type sleeve part existed could you do anything with it? could you scan it, or measure it somehow to lay down a plastic part with your plastic spewing machine?
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Yes I can scan into 3D just about anything. I was going to actually start scanning the LT500 boot, like you have and start with it. I think I can get somewhat close then send out the 3D printed model to some of you to check fitment, then you can give me some feedback and I can change the design etc... and iterate that way. Since I'm doing the 3D printing, its not costing me much to do that. I was having to buy the 3D prints, and each intake was costing me in excess of 200-250 ea. I've already paid for my printer sort of speak with the intakes I've printed so far.
Similarly I've done some work for another aftermarket company and designed them an intake. They made one with wire and electrical tape that was used to transfer the design/shape.
Speaking of printers, I was going to experiment with 3D printing Nylon Bridge material, pretty strong, tough and slick stuff. I think some nice bulky nylon case savers would be the bees knees on the R's...
lastly, modeling clay widely used to sculp parts etc.. that are then scanned. Might be easier than foam etc... you can buy modeling clay at any art shop pretty cheap.
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LT500 Boot Scanned...
(http://i1345.photobucket.com/albums/p669/robl-engineering/TRX250R%20and%20Hybrid%20Velocity%20Intake/LT500%20Boot_zpsiltc2gth.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/TRX250R%20and%20Hybrid%20Velocity%20Intake/LT500%20Boot_zpsiltc2gth.jpg.html)
Here is a start of a layout I was doing based on my stock/cr500 linkage intake for comparison. I think it needs to be thinner where it fits between the shock and frame.
(http://i1345.photobucket.com/albums/p669/robl-engineering/TRX250R%20and%20Hybrid%20Velocity%20Intake/no-link_comp1_zpsrbmojxi8.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/TRX250R%20and%20Hybrid%20Velocity%20Intake/no-link_comp1_zpsrbmojxi8.jpg.html)
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Some pictures from the left side
(http://i1060.photobucket.com/albums/t457/tbone0785/TRX250R/20150723_192406_zpsgtslsknl.jpg)
(http://i1060.photobucket.com/albums/t457/tbone0785/TRX250R/20150723_192419_zpskvrzrotq.jpg)
(http://i1060.photobucket.com/albums/t457/tbone0785/TRX250R/20150723_193008_zpslaeqpskh.jpg)
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Here is a start of a layout I was doing based on my stock/cr500 linkage intake for comparison. I think it needs to be thinner where it fits between the shock and frame.
(http://i1345.photobucket.com/albums/p669/robl-engineering/TRX250R%20and%20Hybrid%20Velocity%20Intake/no-link_comp1_zpsrbmojxi8.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/TRX250R%20and%20Hybrid%20Velocity%20Intake/no-link_comp1_zpsrbmojxi8.jpg.html)
I think that might work Troy. It just might take a longer connecting tube from boot ---> carb to push the box and boot back far enough
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Here are a couple pics of my setup I had on my computer. Will get a couple more over the weekend. The last pic is the tube that is between the carb and the oem airboot. I had the guy who did the airbox mods make it so the boot had a better angle on it.
Doug
(http://i61.tinypic.com/33nx9ts.jpg)
(http://i60.tinypic.com/11b4x7k.jpg)
(http://i58.tinypic.com/2eoimmb.jpg)
(http://i60.tinypic.com/vgu6o6.jpg)
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DBerg... you have a nice selection of oil on the shelf. Can I come over???? Damn desert racers....enough for every pit. haha
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Ok I finally got to take some photos of the airbox setup I have for my bike. Sorry about the photobomb, I tried to get a bunch of shots to show it off. If you click the photos they will come up in their normal 800x600 size
The bike is an Arens no link frame with Roll Design components (call it my poor mans lobo). The rear geometry is the same as a stock frame for the upper shock mount, I just believe the shock mount is a little beefier than a stock frame. There are no factory provisions for a linkage mount, and the swingarm is a Roll Lobo
The intake tube is 2.5" aluminum. Airbox was copied from an 89 box and then tailored to fit and clear everything.
(http://s2.postimg.org/kq1cp70qt/20150724_201216.jpg) (http://postimg.org/image/kq1cp70qt/)
(http://s2.postimg.org/43jsg47t1/20150724_201222.jpg) (http://postimg.org/image/43jsg47t1/)
(http://s2.postimg.org/3o8in3lvp/20150724_201226.jpg) (http://postimg.org/image/3o8in3lvp/)
(http://s2.postimg.org/whp7zzvd1/20150724_201236.jpg) (http://postimg.org/image/whp7zzvd1/)
(http://s2.postimg.org/aowifvnnp/20150724_201243.jpg) (http://postimg.org/image/aowifvnnp/)
(http://s2.postimg.org/5205iel51/20150724_201247.jpg) (http://postimg.org/image/5205iel51/)
(http://s2.postimg.org/dgfs6hm6d/20150724_201256.jpg) (http://postimg.org/image/dgfs6hm6d/)
(http://s2.postimg.org/nf5c6pkzp/20150724_201307.jpg) (http://postimg.org/image/nf5c6pkzp/)
(http://s2.postimg.org/6v7nkgvph/20150724_201317.jpg) (http://postimg.org/image/6v7nkgvph/)
(http://s2.postimg.org/a8batfzwl/20150724_201327.jpg) (http://postimg.org/image/a8batfzwl/)
(http://s2.postimg.org/6fwdrg9s5/20150724_201504.jpg) (http://postimg.org/image/6fwdrg9s5/)
(http://s2.postimg.org/4pdcpys91/20150724_201513.jpg) (http://postimg.org/image/4pdcpys91/)
(http://s2.postimg.org/6jq77pf9h/20150724_201521.jpg) (http://postimg.org/image/6jq77pf9h/)
(http://s2.postimg.org/b8672w4g5/20150724_201541.jpg) (http://postimg.org/image/b8672w4g5/)
(http://s2.postimg.org/s7f5i5fnp/20150724_201548.jpg) (http://postimg.org/image/s7f5i5fnp/)
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Thanks guys for all the pics!! I've got a prototype no-link intake being printed right now. I will post a pic up when its completed on the printer. Next step would be to find a couple spots to send it to test fitment and determine what needs to change to fit better, etc...
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Thanks guys for all the pics!! I've got a prototype no-link intake being printed right now. I will post a pic up when its completed on the printer. Next step would be to find a couple spots to send it to test fitment and determine what needs to change to fit better, etc...
Nice! God I could have used a new intake when riding this weekend. I'm getting robbed of power across the board.
Let me know when you need someone to help you test fitment.
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Here is one more pic of mine, showing the clearance around the shock.
Doug
(http://i57.tinypic.com/1iepzo.jpg)
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Hot off the printer... Prototype genI intake for the no links. Stock shock location version.
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I ran out of black material.... Hence the blue... Lol!
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Looks good Troy. I would think that a stock shock location design should fit most no links because I believe you have the least amount of room to work if the upper shock mount is at the stock location and not raised
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Hot off the printer... Prototype genI intake for the no links. Stock shock location version.
That looks awesome Troy. Looks like the filter will align with the sub-frame much better, as opposed to being on a severe angle
So when do we get to test fitment? :)
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awesome. color is a good thing. I may get home too late to help with fitment,(end of August) but I shure would like one of these bad boys if they clear all the junk. You know...frame, shock, shock again. Great work Troy.
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Well I've got a guy hopefully coming by this weekend to test fitment on an LSR frame with CRF motor No link. Then I'd send it to Tbone to try on his bike after that.
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I cant want to see these done. Troys airbox design is the best i have seen for flow, fitment, and still provides water protection. The 250R's especially the big bores need that bigger filter like the 06 450r's have. I cant wait to be able to run the same air filter on all 3 of my 250R's. I will be buying one for both my stock linkage and CR500 as soon as they are available.
Way to go Troy.
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let me know how the lonestar crf comes out, I need an intake/airbox set up for myself
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What is the inlet size of the 450 filter and I assume the new boot?
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Awesome work Troy!
I understand these are prototypes but Can these printed boots be used as is?
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Off hand i dont know what it is, but its larger than the 250R. And its not tapper. Over all its larger, which gives you less velocity going through the filter element which inturn will pass more air, and capture more dirt. Its a Win, Win, Win Situation.
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06+ 450r filters have s 4.5" ID opening. The filter itself is 6.5" long depending on brand. Much larger filter.
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The 3d printing can be used. However the material in using is not the best for the direct application. These are ABS plastic and are not great at chemical resistance but I'm working on s coating that would allow ABS to be used for a much longer period of not indefinitely. I use ABS prints on the dyno all the time. I've had a bad experience using a printed polycarbonate intake in which broke on me at the dunes and my new 450 sucked sand and took out the top end. 1500 bucks later... I have a new material called 645 Nylon "bridge" material that has no know solvents (ie very chemical resistant) it's also one of the strongest yet flexible materials you can print. Only downside is it takes longer to print and it ou comes in clear/natural color. But could be painted or gel coated. For the one off obscure intake combos I think this would be the best option. Plus i don't have to count on a supplier to provide parts.
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So the inlet diameter is the same as the 250(I've used 4"tube to connect before) There is just more surface area?
I have a big hunk of 4"i.d. hose for this purpose and I was just checking to see if it would work on my new Robl no-link boot when I get it.
Plus I would like to use my airbox if there are no connectivity issues.
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Sorry I meant 4.5". Its 114mm.....
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But I could do a 4" one as well...
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Troy, here's a link for you to check out. Something similar. A lot of posts to go through but he had a problem with heat distortion on the finished product. I thought you might find it interesting
http://www.xr1200ownersgroup.com/site/showthread.php?t=14154
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Ever get to test fitment on the hybrid bike Troy?
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Yes I tested fitment up this weekend on a CRF LSR No link hybrid, it was a converted yz426 chassis. The intake I printed wasn't anywhere close. I scanned his bike and I'm working on a new intake but it will be handconed, cause at least for this setup the intake was super long and would be extremely expensive to do with any other material. I'd like to send the original 3D printed intake to some other guys to see if its closer on a 250R motor -nolink setup.
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I know Jason's Led no link roll design intake is super long as well Troy. He's 2ndmoto on here you might want to have him get some pictures of it.
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Hmm my setup doesn't seem to be much longer than OEM, the hybrid motors must be quite a bit different
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Here you can see how long its going to have to be on a CRF LSR no link. I did a rough quick scan of the frame to lay it out.
(http://i1345.photobucket.com/albums/p669/robl-engineering/TRX250R%20and%20Hybrid%20Velocity%20Intake/handconed_nolink2_zps7kfvjpmp.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/TRX250R%20and%20Hybrid%20Velocity%20Intake/handconed_nolink2_zps7kfvjpmp.jpg.html)
(http://i1345.photobucket.com/albums/p669/robl-engineering/TRX250R%20and%20Hybrid%20Velocity%20Intake/handconed_nolink_zpsbyuqhhvh.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/TRX250R%20and%20Hybrid%20Velocity%20Intake/handconed_nolink_zpsbyuqhhvh.jpg.html)
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Troy that looks pretty similar to the Rolls no link Led intake I saw this weekend, that one was super long and narrow. What shock is the fattest shock body and spring setup available ?
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I always heard Elka had the largest shock springs/body. I added some fudge factor into the shock diameters to ensure clearance. From the side view you can see how far forward the carb is on the CRF vs. a 250r, I think I 250r will be somewhat shorter, maybe 4-5" shorter. Definitely not the ideal setup for performance, but it will be better than what I've seen out there. I also thought about mandrel bending some 3 or 3.5" tubing part way or something so the hole thing doesn't have to be coned.
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Something doesnt seem right. I have had a couple lsr hybrids and the intake did not seem nearly that long. Maybe yz vs crf or your full bump angle is over exaggerated?
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The compressed angle I wasn't sure. the original intake/airbox he had hit the shock, so I tried to give him as much room as possible.
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This is an example of where every bit counts. The shock length, stroke, tire size, and brand of shock could all play a roll. I know you are doing what you can. Im simply saying how much of a pain this makes it to be a "fits all" a lot people dont understand that.
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troy your image looks like my lsr crf hybrid. the hose I am using is super long
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Mike, this intake would have to be pretty bike specific as you and other's have pointed out...
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Here is a mandrel bent 3" aluminum tubing down to 2.5" intake. This will probably be the easiest for me to make, (i.e. cheapest)... still need to work on the airbox for this one.
(http://i1345.photobucket.com/albums/p669/robl-engineering/TRX250R%20and%20Hybrid%20Velocity%20Intake/mandrel_intake_zps1izuyszc.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/TRX250R%20and%20Hybrid%20Velocity%20Intake/mandrel_intake_zps1izuyszc.jpg.html)
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This thing damn near needs a plennum near the carb..
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This is a classic example of what happens when a suspension guy doesn't talk to the motor guy when designing a chassis... LOL!
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That Lone Star no link looks to be the worst case scenario as far as the airbox is concerned, with the raised upper shock mount and the lower pivot on top of the swingarm.
I can see from your bitchen work why LSR made that funky airbox the way they did.
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That Lone Star no link looks to be the worst case scenario as far as the airbox is concerned, with the raised upper shock mount and the lower pivot on top of the swingarm.
I can see from your bitchen work why LSR made that funky airbox the way they did.
I agree. That shock angle looks nuts
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Can one of you give me a dimension for compressed shock angle? roughly? I took a guess so I might be farther back than I really need to be. I do have the box designed now forgot to post a pic of the design. Unfortunately I think this CRF no link will be a one-off deal, and I'll have to do a totally different design for other no links... so we'll see if this design work is all for not.
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http://trx250r.org/attachment.php?attachmentid=9356&d=1393860703&thumb=1
I'm sorry I'm not much help but this pic is of a mock up compressed shock with Roll no linkarm and stock upper mount.
I think you may be in the ball park with the compressed angle of that set up. Compressing the shock may help but not much.
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Here is the final box and intake I've drawn up for the the CRF hybrid. I think the same box will work with many of the 250r hybrids, but the intake will be different. If its shorter I could do other materials besides mandrel bending aluminum tubing and welding sections. This box has my vents on the side but covered with hydrophobic material, pretty cool stuff. The filter is tucked as high up and far back as possible. The seat will actually be the lid for the filter.
Oh and based on your pics I changed the compressed shock angle to 15 degrees that made a big difference in clearance.
(http://i1345.photobucket.com/albums/p669/robl-engineering/mandrel_intake5_zpscu30gm1b.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/mandrel_intake5_zpscu30gm1b.jpg.html)
(http://i1345.photobucket.com/albums/p669/robl-engineering/mandrel_intake4_zpsbobzpl7x.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/mandrel_intake4_zpsbobzpl7x.jpg.html)
(http://i1345.photobucket.com/albums/p669/robl-engineering/mandrel_intake3_zpsudmqrqgv.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/mandrel_intake3_zpsudmqrqgv.jpg.html)
(http://i1345.photobucket.com/albums/p669/robl-engineering/mandrel_intake2_zpsij3d6hgk.jpg) (http://s1345.photobucket.com/user/robl-engineering/media/mandrel_intake2_zpsij3d6hgk.jpg.html)
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Troy you are Bad Ass Sir… That's all. :encouragement:
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LOL Thanks Sky... :D
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http://i40.tinypic.com/25swyvr.jpg
Troy, Is the subframe on the machine you scanned tapered like this one? The top rails in your scan seem to be parallel and every subframe I've seen is tapered. Maybe a non issue.......
What Sky said...
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Well I sucked in water/mud and cut my GNCC racing short this past Saturday Troy. Figured I would bump this up lol
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Sorry I dropped the ball, haven't had a much time to work on it. I'm hoping that all changes in the next few weeks. I've got to get thru somethings then my time should open up significantly mid-Nov..
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What is everyone running for their no link on a stock frame?
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What is everyone running for their no link on a stock frame?
Pro-Tect fabrication airbox
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I have seen them before. They are extremely hard to find.
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Sorry I dropped the ball, haven't had a much time to work on it. I'm hoping that all changes in the next few weeks. I've got to get thru somethings then my time should open up significantly mid-Nov..
Troy any update on your intakes?
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Just sent rablack the intake and airbox for testing, left yesterday. Hope to get back rolling on these while I have some time off work.
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Just sent rablack the intake and airbox for testing, left yesterday. Hope to get back rolling on these while I have some time off work.
Nice! Patiently waiting for [MENTION=100]rablack21[/MENTION]
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Nice! Patiently waiting for [MENTION=100]rablack21[/MENTION]
Don't draw together the lynch mob just yet, Tbone. I haven't received it yet! LOL. Besides, he sent me the standard link setup.
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Thats the one im wanting bad. Cant wait to hear Ryan.
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Thats the one im wanting bad. Cant wait to hear Ryan.
You an everybody else lol
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Don't draw together the lynch mob just yet, Tbone. I haven't received it yet! LOL. Besides, he sent me the standard link setup.
I know I know lol. But I have a sneaking suspicion that the standard/CR500 link box will work on mine, as long as it doesn't hit the shock
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Anxious for cr5 link system here.
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Hey Troy,
Have you ever tested/tried the flow rate of a DS450 Intake ? (I saw this on facebook)
This looks like it might work for a No-Link application.
I used one on my XR650R Hybrid and it worked very well.
Just thought I'd pass this on.
(http://forums.trx250r.org/vbulletin_imports/150_6888_2017-04-18_5782.jpg)
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Pics of the intake boot and airbox for the TRX 250R from ROBL Engineering
(http://forums.trx250r.org/vbulletin_imports/100_6898_2017-04-18_8967.jpg)(http://forums.trx250r.org/vbulletin_imports/100_6899_2017-04-18_5053.jpg)(http://forums.trx250r.org/vbulletin_imports/100_6900_2017-04-18_5543.jpg)(http://forums.trx250r.org/vbulletin_imports/100_6901_2017-04-18_5538.jpg)
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Very festive, and that sammie looks tasty.
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Very festive, and that sammie looks tasty.
Bahaha!!! That was my breakfast.
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How dare you post pics when it's not mounted on your quad yet :mad-new:
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How dare you post pics when it's not mounted on your quad yet :mad-new:
Dear Tbone, Thank you for your sharing and feelings. I brought a gift for you! :flipping-the-bird:
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Dear Tbone, Thank you for your sharing and feelings. I brought a gift for you! :flipping-the-bird:
Lol. That's not the xmas spirit Ryan
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How dare you post pics when it's not mounted on your quad yet :mad-new:
Lol maybe he's going to make it into wall art for ya Tbone.
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Sorry [MENTION=483]Tbone07[/MENTION]. :newhere:........:ban?:
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That intake looks SWEET! Don't get it dirty lol
Sent from my Galaxy S5
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How are these coming Troy?
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Coming along great. Ryan test fit the design and I need to make some tweaks so it fits like stock then remake them test fit again, then should be ready to go to dyno.
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Bump....
Troy, Ryan, hows the airbox coming along?
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Tbone not to get off topic but what color red powder is on your lsr and what color blue on the swinger? Also any updates on this? I just bought a lobo R and Im currently in need of a air box setup. Was looking into pro tech but this caught my eye!
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bump bump :wrenching::quad: