NO-Link Intake

[troybilt]

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

[ytman]

That is definitely an area that could use the attention of someone with your skills.

[Deuce]

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.

[69HemiGTX]

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.

[troybilt]

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.

[KsSandduner]

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.

[Tbone07]

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

[troybilt]

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.

[Deuce]

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

[Dirt man]

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.

[Flyin_250r]

Us lobo owners need this lol. I'd let you use my lobo chassis if I was closer.

[troybilt]

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.

[bnau267]

I'm still interested in one for my CR500 link Laeger - stock airbox 38pwk.

[Deuce]

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...

[D Bergstrom]

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