TRX250R.ORG
General => Pics and Vids => Topic started by: Pricecheck on November 04, 2013, 01:19:44 PM
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Alright, I made it down to the okgoldrush and competed in the XC event. This was the first time I've ever raced and like an idiot I wasn't watching further out for the flagger. I was staring at the dude near me so I started late! Anyways, I was making up ground and you'll see what happens.
My fuel, wiring, kill switch and everything I can check externally was fine. I pulled the plug and it was soaked. I was able to get it pull started but it would run like crap and it couldn't even handle over half throttle in 2nd gear in the mx area. It finally gave up on starting. I pulled thew stator cover and the ignition looked fine. While trying to kick start it in the pits it would occasionally make a "plap" backfire sound.
It's lunch right now and I pulled the cover off again but I don't have a flywheel puller. I did try starting it and even disconnected the kill switch and no changes. This time it's not making the backfire sound. I have no kickback either. I also have fine compression. At least it feels like it did before the problem occurred. I was told that it could be the woodruff key. Any other thoughts? In addition to this I can slowly turn the flywheel and I know the cylinder is moving because I can hear it moving air like normal.
It just doesn't seem to be getting spark.
http://www.youtube.com/watch?v=9Zatlf2ssjQ#t=294
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Thanks man. I have been planning for this race while I was deployed and hadn't even began to build this bike. I'm going to get this thing sorted out and represent the R. Hell, there were only 3 two stroke quads there. A banshee, a quadzilla and me. I was the only one racing.
Many people wanted to see it run and I had tons of compliments. At least it looked good like you said!
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That's a fun race. That's terrible you had such bad luck. Quad was looking and sounding good til it died. Get a fresh plug and plug it into your cap(without one in the motor) and kick with your finger on the plug. You'll find out if you have spark. That's how I do it. Or you could just touch the plug to anything metal and look for spark, but where's the fun in that? I'll be there for sure next year with fresh shocks and my LSR frame build I'm gonna do.
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That sucks man....especially after all the work you did to get there. But that's the way it is sometimes. I looked and that is a 13 hour drive for me. I would really like to run that next year.
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I was going to say lean but didn't want to tell him. In the video it sounds leaner than I like to hear them. Sounded like it was "struggling" on top. Also looked easy to kick over in the video. My Harley was flat and sounded weird until I got the jetting dialed in. Now it has crisp throttle response and sounds even louder!
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I did take it apart and she was lean. I thought back about how I never had a good seal on the exhaust manifold/pipe area. That morning it was a little messier than normal and actually had exhaust coming out at one point. I didn't think much of it because I think I was too excited to race. Well, that leak most likely caused me to lean out and it jacked up the piston. Not much at all on the cylinder but the piston is done.
I'll try to compress the pics some and get them on here. This site doesn't like larger files. I shoot RAW images and they start at about 25 mb each! It sounds off but that's the way it is when shooting that quality.
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PC I ALWAYS make sure my quad is hot before the start. It's chilly in the morning when they start and you(everyone, not just you) just hop on it and hit that that pavement pretty much right away. That's a very easy way to seize a motor. They line you up and then you usually end up sitting there for around 5 mins. Right around 4:42 you go down into the bus stop and cut that guy off on the inside. That's not the fast way. Stay to the outside on that corner(especially in supermoto) because it usually bunches up into that corner and you can easily just motor around everyone on the outside(which becomes the inside for that next little corner before the hill). From there you were making a run up into the hill with the right hander when it all went wrong. In that right hander you want to stay left for as long as you can then cut in. Do it right and you can easily carry 10 more mph into that corner and hit it wide open without lifting on the throttle. IMO it's hard on your motor to be running it wide open for long stretches then lift some. Again IMO you're better off to pull in the clutch and blip the throttle some to get some fuel into it and cool it off, if you're gonna let off to begin with. Sooner or later though you gotta downshift a gear or two for some of the corners that you didn't make it into. Jetting is very important for this race. You can burn a motor up quick as you found out.
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Hey Pricecheck, come ride mine and see if you like the way the porting is.
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Hey Pricecheck, come ride mine and see if you like the way the porting is.
Hmm. Where's Garnett? I'll be in KC this weekend. Whatcha run?
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Woodruff key with flywheel on. Head. Two jug pics.
[ATTACH=CONFIG]2219[/ATTACH][ATTACH=CONFIG]2220[/ATTACH][ATTACH=CONFIG]2221[/ATTACH][ATTACH=CONFIG]2222[/ATTACH]
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Piston intake, top and exhaust. Two of the slight reed damage.
[ATTACH=CONFIG]2223[/ATTACH][ATTACH=CONFIG]2224[/ATTACH][ATTACH=CONFIG]2225[/ATTACH][ATTACH=CONFIG]2226[/ATTACH][ATTACH=CONFIG]2227[/ATTACH]
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Spiritaces, they worked! Thanks.
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Mennis I feel ya 100% on that. I watched the supermoto from the bus stop area and I saw that the good guys picked those lines.
About it being cold I did have it jetted to this climate but I really really think the exhaust leak at the manifold was a big cause of the failure. I actually did warm it up for a while. At the trailer, rode it around, at the racers meeting and for the 10 minutes of video I cut out.
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Sorry for your misfortune. You see too many of those piston pics. As our resident tech guy (Dave) says, " Get them new parts and get that thing going" :onthego: Good luck!
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Pricecheck, I just went to the races website and wow that looks like a fun race. I was surprised how long it is, like 5 laps of 11 miles each or something like that, holy crap. I might try to go run beginner next year but certainly wouldn't brave it on a big bore, my stock R would wear me out.
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Bummer, the only advice I could offer is blip the throttle when decelerating. The motor needs fuel then also.
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I would send your motor off to one of the builders that post on this site if I was in your shoes. The work they do speaks for itself and they wont try and manipulate you into using their services by trying to act like your best buddy and giving you their cell phone number lol... Hope you get back up and running asap.
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Longrod, it was like you read a text I was given this morning!
I've already been in contact with Neil. That text this morning rubbed me the wrong way and I think I know where I'll be spending my time while discussing R's for now on.
There is too much knowledge and real world experience here to not be a part of. I've already got Dan and Troy down the road and that has helped a lot.
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Pricecheck, I just went to the races website and wow that looks like a fun race. I was surprised how long it is, like 5 laps of 11 miles each or something like that, holy crap. I might try to go run beginner next year but certainly wouldn't brave it on a big bore, my stock R would wear me out.
Yeah, it was 5 laps of 9 miles. I was going to do that and supermoto since I brought my mx tires that were worn to about 65%. I knew the xc would have kicked my butt, but I needed to get out there and do it. I guess next year I'll have plenty of time to get it ready and in shape.
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Longrod, it was like you read a text I was given this morning!
I've already been in contact with Neil. That text this morning rubbed me the wrong way and I think I know where I'll be spending my time while discussing R's for now on.
There is too much knowledge and real world experience here to not be a part of. I've already got Dan and Troy down the road and that has helped a lot.
That's great to hear PC Neil does awesome work from what I have seen in the past and peoples posts praising his motors. I plan to send my motor to him when the time comes and my buddy Lou is hoping to send his out this winter to have the bottom end rebuilt. I don't have a problem with the people on the other site, I go there from time to time to check out posts that aren't over here but every time I go there I just feel greed is what powers that site. Just so you know also my post on the other site might have came off as rude but I was just trying to give you some honest help instead of giving you the run around like some others on that site will do.
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Hummm, I think I seen in that second set of pics, where the "plop" sound you mentioned in the PM came from, the front edge of the piston.
Cylinder bore dont look very bad at all, so far as damage, but that ol piston took the toll after the two start ups.
Neil
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Pricecheck, some other things to consider, does the petcock flow enough fuel to feed this big bore when running it hard? Have you done a flow test and timed how long it takes to flow 10oz of fuel? Might look into the petcock mod if you haven't already modified your fuel system.
Also, are you running a good fuel?
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Pricecheck, some other things to consider, does the petcock flow enough fuel to feed this big bore when running it hard? Have you done a flow test and timed how long it takes to flow 10oz of fuel? Might look into the petcock mod if you haven't already modified your fuel system.
Also, are you running a good fuel?
Bowtie I have not modded the petcock. Great idea on looking into it. I wondered if it were possible.
I run c12 with castor 927 32:1 mix.
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Bowtie I have not modded the petcock. Great idea on looking into it. I wondered if it were possible.
I run c12 with castor 927 32:1 mix.
Fuel and oil sound fine, check this thread out. http://trx250r.org/showthread.php?1637-Petcock-mod-flow-data
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Here's the crank/rod area….
[ATTACH=CONFIG]2239[/ATTACH][ATTACH=CONFIG]2240[/ATTACH]
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Hummm, that dont look like an OEM rod, not clearanced like that, maybe Hot Rods crank.
Push that thrust washer over the the side & measure in between the washer & rod. Be sure to measure with the end of the feeler gauge, just between the rod & washer & not all the way down to the pin beside the bearing cage.
Neil
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The measurement all the way down with the rod shifted to one side is the .044. All the way down is the .025. All I know is it's an ESR 330 top end with a +4mm stroke. If you click on the first picture I actually drew on it in the computer program and labeled where I measured from and the specs.
I did in fact use the end of the gauge. I think it's best that I do what we discussed and rip of the sides and remove the clutch assembly and flywheel stuff and send in the rest for you to go through. It's the safest bet and leaves me with the peace of mind that it has been gone through by a professional and it is to spec. Me doing this and saying it's good probably isn't the way. I band aided my exhaust leak and it obviously failed me and put me here. I'm not down to be at this point during the next ride or race!
I sent you a pm as well.
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Alright, so after my piston destruction I wrote BDT, c-leigh and jerry hall. Being the impatient person I am and other factors I went to BDT, the original builder of the engine. I know many don't favor this choice but hear me out. He is the original builder of the engine. He was reasonably priced for the work and he will be throwing in a little extra tuning into the mix. I'm curious to see what this yields. I know I'm not experienced in a lot of setups but with this choice I am getting a faster turnaround and good work. Have you know, bdt's engine didn't fail me. I failed to properly fix the exhaust leak and it cost me a piston. We all learn and thus unfortunately cost me a race, $650+ and maybe a membership to .org since I'm dealing with "the dark side"! There's nothing but love here but know I have to look out for what's best for my finances and ultimately my family.
I know there's a past with individuals and certain people but I'm one to try and get along with all. We are all R lovers and I'm here to gain knowledge from all if you who were fortunate enough to get into earlier than I was.
Stay tuned for my results of the petcock mod. I plan on noting the cap vents and petcock diameter.
Until then, keep the legend alive!
PS. sorry about the iPhone auto correct.
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Get your engine back together and get out there and race. No matter who builds your engine, YOU have to be happy with it, not anyone else. Look forward to reading more.
Thanks man. I look forward to posting my progress and the future hybrid I'm going to build for my wife. I have an 88 frame and my wife wants an electric start 4-stroke.
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He gave you the old wheel and deal just like he wanted hahahaha
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Man I watched the video again, and seen you have one of those "piston killer" tank vent caps. Those are cool but can plug and cause fuel delivery issues when they don't vent properly.
Every time I come back to this page, more and more I want to try to hit this race next year. It looks like a blast even if I came in last place. I would be in the beginner quad class.
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Bowtie this race is a blast. This year was the first one I've missed in quite a few years. I've been trying for years to get others to try it, but never was successful. I gotta get some shocks rebuilt... Last year I did beginner open dirtbike only, but I usually just do the supermoto. The XC is a blast too tho. It's all fun and you're gonna ride some pavement regardless of which race you do.
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Mennis, I'm in. I'm going to start planning out the rebuild now.
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I'm running this race next year. I just have a further drive next time but will making a weekend of it. Hell, it's fun watching the supermoto around the bus stop area. Lots of pics taken. Lots of money rolling around to include the turbocharged rzr.
I'm going back and maybe the wife will want to ride enough that she'll let me build her one.
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This race has really blown up in the past 15 years+. Used to be just a bunch of us showing up in pick ups (enclosed trailers were for the rich haha). PC and BT, my best ever finish was the first time I did it and that was 4th in XC(no supermoto class back in then, around 1996????? maybe 97). I had 3 banshees beat me and was the first R across the line in the amateur class. I think there was 14-16 other riders in my class. I still have some pics from then(nothing exciting) and honestly the course hasn't changed much(even tho they do mix it up).
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Are there rules for these races? Safety and whatnot? I don't want to get there and not be able to run because of not having a killswitch or heel guards or something. I checked on the goldrush website and there is not anything posted that I could find.
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Are there rules for these races? Safety and whatnot? I don't want to get there and not be able to run because of not having a killswitch or heel guards or something. I checked on the goldrush website and there is not anything posted that I could find.
I do have to say that for 18 years they don't have good advertising. Their website isn't good as well.
Rules from what I know is just helmet and gloves. Pants are smart as well as boots. No kill switch required or heel guards or nerfs. They told me it's basically run what you brung. I personally run my whole uniform with chest protector and neck brace. I happen to have nerfs and a tether. I like the tether but it was interesting doing the cold start with it. Just have to cross your hands over each other.
If you watch my video you actually hear the guy next to me and his quad running when it should have been off! Not much checking by the official.
Besides all of that, it was a blast for just the time I raced and watching the supermoto.
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I do have to say that for 18 years they don't have good advertising. Their website isn't good as well.
Rules from what I know is just helmet and gloves. Pants are smart as well as boots. No kill switch required or heel guards or nerfs. They told me it's basically run what you brung. I personally run my whole uniform with chest protector and neck brace. I happen to have nerfs and a tether. I like the tether but it was interesting doing the cold start with it. Just have to cross your hands over each other.
If you watch my video you actually hear the guy next to me and his quad running when it should have been off! Not much checking by the official.
Besides all of that, it was a blast for just the time I raced and watching the supermoto.
Well hell, equipment-wise, I'm good to go now, just a few weeks late.
Is the beginner quad race shorter than the amateur? I might enter in both then bail on the amateur if my body or equipment fails me.
I am way to dang excited about this race for it being a year away.
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The beginner is shorter in time and distance. I don't know the course but I've looked at the lap times and they are quicker. I assume that they block off areas for different skill levels. Expert and amateur are the same. Beginner XC also competes a day before the amateur and pro.
I also know that if you pay to enter you don't get a refund. You also don't have to worry about the registration ahead of time. I showed up the evening prior, dropped off my trailer, registered and headed to my hotel. If I had no kids I would have slept out in the truck or trailer. It was a little cold though and 2014 the races are from Nov 7-9 from what they have on the website.
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Alright. It's back together! This is a quick clip from my phone of its first crank after the rebuild. The compression is a lot more. The arch of my foot hurts. Military style boot doesn't help as much as I thought.
I through in a quick walk around in the garage. There you can briefly see how the yfz motor fits. Lower mounts need attention the most. I might throw on my 86 swinger just for alignment purposes. I'd like to have the motor mounted so I can work on oil tank and battery tray mounts.
Enough about that. The 344 is in and that was one of two idles I performed on the rebuild. Not too much time I have lately so this break in procedure will take a little bit of time.