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Found 150 results

  1. stobjohn

    Blown engine

    I have a xr 200 r its ran like a champ for the past five years but started smoking about a year ago and burning oil ive heard there are tricks such as pouring coke or diesel down the heads and letting it soak in to help solve it smoking is there anything else or would this work thank you.
  2. Callum Hunter

    250f rebuild help/shops in Vancouver, Canada

    I'm quite new to the moto scene and I've got a '09 CRF250R in need of what I believe is a top end rebuild. I've never gotten a rebuild before so I'm unfamiliar with the process and the steps to take in getting this done in a safe and efficient manner. I was wondering if anyone knew of any reputable shops in or near Vancouver, Canada (where I live) that could look at my bike and help me out with my situation. About 6 months ago I got an inspection on the bike and the shop told me that my cam bearings had "spun in their journals", requiring the installation of a new cam along with the rebuild. I haven't had anything done to the bike since the inspection so the motor is still in this state. She's running but I'm afraid that the motor is a ticking time bomb and would like a shop to take a look at it, let me know what needs to be replaced and get the rebuild done without me worrying about getting taken advantage of. I'm currently out of the country in school but have plans to get this done once I'm back. Any tips, recommendations, or help would be greatly appreciated!
  3. Hello all! This is my first post so forgive me if I miss any formalities. Just got my hands on a 01 rm250, I have been running through the forums here looking for info but I feel that my need for information is too broad, probably because this is my first smoker. I'm a handy guy though so I feel that I shouldn't have many issues getting this thing in top shape (with a little help of course). The bike has a few small issues. First and foremost being that it is quite hard to start when cold. This I learned the hard way with no boots and a bruised foot. Second issue is there seems to be a bog mid throttle, its like it falls on its face right before it hits the band. Mods include a fmf shorty and vforce reeds. I have went through the carb and checked the reeds. One set of the reeds was really loose when I got them off so I snugged those up and put it back together. This helped some. I have been through the forums many times, the issue is I don't see many 01s with these issues and im unsure of the model changes through the years. Will post pics when I get off work. Thanks for any insight.
  4. Previous owner used some sort of nasty sealer on 2000 KTM 125 headgasket. Razor blade would not touch it beyond this. I had 2 headgaskets out of 5 heads that were stuck this bad. Suggestions?
  5. Hello everyone, I've been away from the forum for a bit, after I ran the DRZ into the ground and couldn't fix it until now. I've read through many posts about big bores, but most of them are aimed at max HP and things like that. I'm not looking to make 55HP, but my engine is done so it needs everything. I ran the bike on the highway for too long, didn't check levels properly, vaporised all the oil and ruined the engine. The big end is gone, the cilinder wall is worn, the cams and chains are worn and even the valves are having issues. I ran it for a while with all these problems, since I had not other transport. Gotta love a bike on a budget.... For the last few weeks I've been looking for big bore kits and info on them. I want to build a DRZ that does a bit better on the highway, has more power overall but want it underpowered and overbuilt. Towards 50HP would be nice, but not a requirement. My budget is decent, but not endless, which gives me a problem: there are soooooo many brands and styles around, I can't see the forest through the trees. The prices differ immensely, as does quality. On top of that there are setups that just run on race gas, which I can't over here, so I'm looking for a streetable setup. Since I live in the Netherlands, Europe, I have to ship everything over, and to save money in the long run I would rather spend a bit more initially and get it right, instead of getting three different kits. Its a 2005 SM with a stock engine, I will get: Big Bore cilinder (not set on cc's, but looking around the 470 range) Piston Stroker crank/rod (crank is most likely done) Cams (don't need super hectic lift and duration) ACT gears Carb (39 or 41) All the consumables and bearings Its fitted with a Leovinci 3X, have the 3x3 mod, valve and other smog stuff is removed. Not a brand fanboy specifically, I've looked at and could find out about them: MaxRPM, both IceCube and the Stealth, looks great but pricey. CilinderWorks, not sure what their quality is but they're cheap. Athena, mixed reviews and medium pricing. HotRods cranks, famous name but no idea on durability. HotCams & Web Cams, I don't have a preference, whichever gets me the best cam. And a bunch of brandless cilinders, packaged with branded items. Impossible to find out what the level of quality is. Who can help me out on deciding on this setup? More top speed, more power over the whole range, but rather have less power and more reliability than maximum RPM. I know the best solution is OEM, but since I'm building it, I might as well add to it.
  6. Hi! I'm thinking about buying an 03' CR250 and the seller did a rebuild, new piston, pro circuit exhaust, new crank, carburetor, spark plug, all new bearings and some other smaller things (seals etc.), on the picture bellow you can really see she's a beauty... okay so the problem is that after the rebuild the bike goes into false neutral every couple of shifts eg. every 10 min of riding. It didn't do that before the rebuild so any ideas? Also the bike is selling for $1450 and the price isn't final so that's why I'm so interested. Thanks in advance, ulajemuzica
  7. So I am currently working on a 1997 CR125 and plan to make a full race build on it. But I have been noticing that there are not very many aftermarket parts the biggest being the plastics and graphics for it due to the frame,tank,sub frame, etc. I was wondering if its possible to put that engine into a CR125 frame anywhere from 98-07 and how hard that would be to do. I have a welder but I am not confident enough to weld new motor mounts. If you guys could help me out with this that would be great.
  8. Dillon Downing

    Yz400f crankshaft fit in wr400f?

    Hello, I was rebuilding my bottom end in my 1999 wr400 because the crankshaft broke on it. Bought a 1998 yz400 crank to put in it and after measuring them, the can chain timing gear on the crank is ~0.5mm different between the two along the shaft. The rod bearings on the yz are also bigger but that shouldn't be an issue. Should I be ok or do I need to buy a wr specific crank off of fleabay? Thanks for the responses!
  9. Newjorciks

    Rebuild help

    Hi, so after a countershaft bearing failure I needed to take the engine apart for inspection and repair. I had a few questions that I think the forum members will be more knowledgeable than me. 1) I have pitting in my 2ND DRIVE and 4TH DRIVE gears and I am unsure where the damage could come from(Without affecting the DRIVEN gears as those are fine) and if I should replace the gears. 2) I will be replacing the oil pump completely as that is worn a lot from metal shavings, but the problem is that one side of the pump goes against the case and there are score marks in the aluminium. They aren't gouges, but you can feel them when dragging with your nail. Getting a new case isn't really a good option. Is there a possible partial fix I can do to lessen the damage or should I not worry about it too much? 3) The splines on my countershaft sprocket are a little worn with noticeable play with the sprocket on. Red loctite fix hasn't really been helping and the sprocket nut still comes loose after a while(Maybe 1000km or something). I included a video where you can both see the play and the wear on the splines. Should I just not worry about it and keep tightening the nut every once in a while? Or is there some fix other than ~100Eur shaft replacement? Youtube link to the sprocket video Thank you, very much for any help you give me for these questions.
  10. Hey guys, I have an 09 kx250f That I just fully rebuilt.....new crank, new bearings, new cylinder, new piston and rings with stock compression ratio, new cam chain, 2 new OEM intake valves, reshimmed, timing is 100% correct...and i still cant get it to fire up! Took the whole carb apart and cleaned it...used carb cleaner and compressed air. Still nothing. Then I noticed that when I slowly push down on the kick starter I hear air leaking from the air filter. ...but ONLY when the choke is on. When the choke is off, no air leaking. Note- i did adjust the timing one tooth over on the exhaust side and see what that does....still nothing! Just trial and error. That couldnt have damaged any valves correct?? I put timing back and still nothing new. Maybe I need to rejet? What jets are you guys running? Any help would be appreciated!! Thanks
  11. the_barfman

    XR600R Rebuilding a 1984 XR500R

    Hi all, I am new to this forum and didn't find a page for XR500's so I figured this page will be the closest thing. Let me know if there is a different forum to which I should be posting. I recently acquired a 1984 XR500R for $200. The bike wasn't running and definitely wasn't in the best of shape. Covered in grime, no compression, etc... Anyways I am completely overhauling the bike. New paint, new parts, engine rebuild, everything. However, I have never attempted a complete engine rebuild. I figure an older bike like this would be a good start to learning my way around engines and a fun side project for me. I just wanted to get people's opinions. Should I attempt the entire rebuild myself? What all would that require? Or if I want the bike to actually run again, am I better off just having a shop rebuild it?😅 The guy I bought the bike from obviously neglected it after it lost compression. He claims he was riding it on the highway and the compression blew out as he was riding. Told me it only needs a gasket job and it will run strong again. Any hints or tips would be really appreciated! I love this community and really want to be apart of it! (And yes the bike is in terrible shape in the picture I posted, I will post updated pictures of what I have accomplished so far soon)
  12. Austin McQuiller

    Rebuild on DS80. Advice wanted. Thanks!

    So I acquired a 1994 DS 80 that had been sitting in a shed for a few years after sitting up against a garage for a few years. I decided to tear it apart and found a bunch of Ice inside one of the covers. I then decided to rip the thing completely apart figured either it’s gonna be a lot of pieces I can’t put back together or a lot of pieces I can figure out. (I’m an automotive mechanic and didn’t figure a dirt bike could make me look to stupid) Upon getting it completely ripped down it seems as if the lower end has been rebuild very shortly before it was abandoned, and the top end was completely shot. I found a 2002 JR 80 online that had a fresh top end rebuild on it just before the guys son tried to replace the kickstarter gear without splitting the casing. Enough said I got it split apart and the tension spring for the kick starter was wrapped around the gears. Going back together what is the best way to make sure all off the gears are completely lines up or what do I need to watch for? Also the shift pins in the shift cylinder (not sure what the thing is actually called) there is one pin different from the others and I’m not sure the location it needs to be in.
  13. 2008 crf250r, in the process of finishing up a top end rebuild, and after installing the timing chain onto the cam I deciding to hand crank the engine slowly with the kickstart to see if everything was alright. There is a distinct knock that sounds like it is coming from somewhere in the cylinder each time I turn the engine over. What would be causing this sound?
  14. I need to do the forks on: 2012 WR450F 2007 YZ250 Is there a trick to getting the compression damper piece out without that special fork cap tool? Heres what im talking about: 2012 WR450F 2007 YZ250 I rebuilt a pair of AOS forks with no special tools but I think the compression body came out with a 17mm socket. It was off a 2008 KLX450, I'm PRETTY sure top looked like this: Maybe someone can verify that 2008 KLX450R forks have that style of top cap. I cant remember and the bike is not in my possession atm. I dont like buying model specific tools so if there is a trick to getting those compression caps off let me know!
  15. Hey, new member here, my name is Josh. Been looking to get on a bike as I'm growing tired of only having the blaster, so been reading on here about a good beginner bike for myself, and started looking for xr250s. I ended up a project 1994 xr250r, with a broken kick start return spring. (According to PO). He said he picked it up as a project himself but time got away from him. Many oil leaks on this thing during the time I did get it to fire... all valve adjustment caps on rocker cover, oil line fitting at oil cooler, all engine mount bolts loose, 2 hex caps on inside of cyl head by spark plug leak, missing rear brake pedal, kickstand. Also Found a pile of JB weld on clutch cover right above kickstart. (Covering g auto decompression shaft orifice).. I Pulled the cover, and find spring is not broken, but installed on opposite side of casting boss in crankcase. Auto decompression parts Missing in crankcase it seems as well?. Well after I pulled out kickstart shaft to reseat the spring, noticed a bolt was missing from bracket that mounts toward rear of engine and holds the tab on the kicker shaft... Started feeling around with a magnet through the crankcase looking for the missing bolt, and pulled this part out.. what am I dealing with here? Seems like I may need to pull motor and go through it huh... Can anyone ID this small piece and recommend where to go from here? Working with different cars over the years it almost looks like a relief valve plunger for the oil pump... Anybody confirm?
  16. hey guys, first post but i need some help on the bottom end of my kx 80 picked it up of craigslist... good price but needed a full rebuild. can anyone help with the fact that i have the motor apart and everthing neatly aranged. now everthing replaced good to go. stuck a little on the re sealing this bottom end. is it ok if i use just black rtv on the case. instead of doing a cosmetic bottom end gasket kit. i would just use rtv and seal it like that. would that be ok or do i really need the paper gaskets. thanks alot any info will help
  17. 2009 YZF250 - Ex Dixon bike with the wet sump conversion. Stuck a bunch of quality hours on this thing the other weekend doing some enduro practice. Didn't skip a beat! Changed out the oil and filter, putoline - 850ml with filter change as recommended by someone off the dixon facebook page. Fresh airfilter. Didn't start it for a few days after the oil change as was late at night after service, warmed it up at trackside this weekend with no issues to get the oil flowing, checked pressure by removing the bolt, all fine... Killed it. Came back to the bike about 15 mins later started fine, rode literally about 100m (wasn't hanging around but not going mad) and she just died under load, instant death. I believe it locked up, hard to recall. Didn't feel right either-way, i've had bikes flame out on me (CRF450) and this was a bit different. Bike started OK afterwards, I sat there with it on idle for about 10 seconds, all good, gave it some throttle and it just came to an abrupt stop again, almost made a squeak when it stopped. Rolled back to pits, checked oil filter, was fully soaked, everything looked fine, rads weren't exactly hot but i'd only been riding for a short period, head was pretty hot to touch, crank didn't seem that hot - but then again i've never touched an engine after 4 minutes of running so I've no idea what sort of temp it should be haha. Bike started again fine after little inspection, idled OK. Sounded sweet, no rattles or bangs. Started to give it some throttle, rolling the revs and it just came to a screeching stop again. Kicked it in anger and it hasn't started again since. Gave it a little strip down last night, took valve cover off, all looks normal, valves are in spec still, took the carb off and had a look down the inlet, small little bits of something foreign in there and the tiniest of metal slivers sitting ontop of one of the valves. (By this point i'd already dropped oil and filter for inspection, nothing that looked out of place) Now the bike kicks over OK. Its never had the strongest of compression on kick, but its been a while since i've had a 250F. it does 'get hard' at certain points but its pretty easy to kick through these hard points normally just body weight will do it. Can any of you advise on moving forwards, i'm going to remove head and cylinder for inspection but i've never dug this deep into an engine before haha! Any thoughts or tips on things to look out for? Bike has a spark I should add, not that this really felt like a lack of ignition.
  18. KG FILMS

    No carbon buildup on piston?

    K so I am getting so frustrated with this bike😕 the problem is when I looked down at my piston with a camera there was absolutely no carbon buildup on the piston and it still looks new. What could cause this? The bike is a 2001 cr80r. (Thanks)
  19. Hi guys, a couple of weeks ago the electric starter on my 05 wr250f quit working after working like a charm for a couple of years without any issues. It still started pretty easy kicking it but I put a brand new battery in it to see if that would fix the electric start but that didn't do the trick. I'm decently handy at working on my bike but i don't want to start playing around with the electric start unit/other electrical components so i decided i want to take it to a shop to get fixed up. While its there I was going to ask them to rebuild the carb since its been sitting for a while and could use a rebuild/re-jetting. Anyways, i want to see if anyone else has had a shop do a carb rebuild and/or fix the electric start on their wr250f, and how much $$$ it cost. I'd like to have an idea of how much it cost for you guys so I can have a good gauge on how the shops will price the job. Any shared experiences will be appreciated!!! Thanks
  20. Michael Woodcock

    Truing the DRZ crank

    So I've 3d printed the crank truing stand, I'll upload that to thingiverse soon, may make some improvements first. It uses skate bearings. The crank is well within spec. maybe .04mm max at the very ends of the crankshaft. I've never trued a crank before, this is my first time measuring one even. The manual shows where to measure it. I'm curious if it's even worth the trouble to try and get it perfect, probably not obtainable. Obviously I can't smack the crank on these PLA stands
  21. Taylorross

    1985 XR600R REBUILD PART 2

    Hello Thumpertalk, This thread will document the repair and assembly of my 85 xr600r. It's been a while so i thought id start a new thread. You can find the original thread here. Here we go! Showing the manual and C1 Gear high and low boss sides. below is the lower boss side. these were on backwards when i took them out if i remember correctly, would explain neutral to first and first to 2nd shifting slippage Blue ink is oem parts fiche diagram#'s Below is the Higher boss side C1 Same with C2 below. Higher boss side Lower boss side C2 below with the worst of the damage on any of the gear dog mating holes (please let me know the correct engineering term because that cant be correct Worst of the wear on any of the gear dogs Finished Main shaft and my brand new circlip/snap-ring pliers. excited to use these babies in the future on my next project (yes I'm already thinking of another one) Workbench Holy Clearance Specs Batman! Used Micrometer. All good. Wash Bin Completed Transmission!! Crankshaft and connecting rod. Falicon Rod In the shop right now getting cleaned straightened and pressed together. Couldn't resist a picture with my firefighter hat! Cleaning cases Masking Cases Primer and Paint start to finish in my super professional homemade painting booth Tape Off That's it for now! Going back to work tomorrow. Will Post pics next week of pressed crankshaft. Maybe paint other engine covers. Need to order Shift Drum pieces and have all the bearings pressed in Thanks guys! P.S. Please let me know if you see anything wrong or have any suggestions. HAPPY 4TH OF JULY!!
  22. Okay, so I bought this 2000 RM250, I've never done anything besides basic maintenance really, so I bought this to learn. Im not sure if im posting in the right place or not, if not forgive me, but I paid $200 for it, wasnt expecting much, he said he thought it needed carb work, but took off the top end and the piston has pock marks, and is shot, the cylinder looks clean, now the crank has play in it (vertically) so I was told the crankshaft needs replaced, on another forum, problem is I cant find a crank shaft, a complete bottom end, anything, closest I can find is a rod, and I can find top end kits all day long, also the swingarm bolt is seized, so advice on that would help also, so if anyone could point me in the right direction it would be appreciated, I found a 2002 bottom end on ebay but i'm not sure if it would work or not, but I bid on it since it was real cheap and something happened and ebay shut down my account, so any advice?
  23. Hello, so I'm currently in the middle of an unexpected top end rebuild due to gas wiping out my piston rings. I'm thinking about doing a big bore kit, maybe 434 or something, but I don't want to be required to run high octane fuel or octane booster due to where I plan on taking my bike. It's a 2000 DRZ400S with 11k miles, original Mikuni carb, stock exhaust (for now), no 3x3 mod but that can be done quickly if needed. The cylinder and piston don't look bad so I could just get some new rings, but I figure I've come this far maybe a new head/ more power would be fun! I've seen some threads about the upgrade but no solid info on a BB kit that wouldn't require high octane fuel, which can be harder to come by in certain places. I'm still searching but I need to order asap so I wanted to see what you all had to say! I'm not on a strict budget but I'd like to keep this reasonable, less than $500 if possible. Any info is greatly appreciated! Also, since I'm in there, you think a cam upgrade is a good idea also?
  24. Hello all, finally got all the materials to replace my top end on my 2008 crf450r. Just wondering if anyone who has done it before has a specific order they recommend? What I mean is replace piston then pull flywheel and put a the new cam chain on? Or leave the jug on to pull flywheel? Or no special order is needed? Also shimming the valves, should that be last? Thanks!
  25. Zapdos

    Can I run this piston?

    Is there supposed to be a bit of resistance? Is it warped? Is the pin worn out? Can I run it without damaging the cylinder? https://streamable.com/mll5b
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