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Found 127 results

  1. 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.
  2. 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.
  3. 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.
  4. 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?
  5. 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
  6. 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?
  7. 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!
  8. 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.
  9. 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)
  10. 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?
  11. 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!
  12. 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.
  13. 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!
  14. 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
  15. 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!!
  16. 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?
  17. Hey Guys. I have a Honda XR 250r 1999 that i have just rebuilt. I got the piston and barrel done in a shop along with the valves. The bike is running well but has a issue with burning oil. The decompression valve on the engine was jammed but we managed to free it up but the bike has lacked compression since it was freed. I have no issue starting the bike but would a broken/stuck decompression valve be a reason behind the burning of the oil and lack of compression? I started with a synthetic oil but was advised to use a mineral so did a oil change and now have 20w-50 mineral in the bike but have seen no change.
  18. I just got done rebuilding my 99 ktm 250sx and after i got done i started it up it wouldn't idle or start with out a quarter throttle and it would get up in the rpms buy would die down quicker than normal 2 strokes. it was getting gas it didn't sound like it wasn't getting gas the rpms would go down super fast i messed with the idle screw but it wouldn't do that before i had to flush it out with oil cause the piston blew apart it feels like its getting seized at a certain point of the stroke i would just like to know the reason why
  19. Rabbit22

    kickstarter

    I had to split my cases and I am putting everything back on my klx110. I was wondering if my kickstarter's gear should be able o move if it is installed correctly? Right now the gearbox shaft is locked up along with the kickstarter. The manual is terrible at giving details. I put the kickstarter in but I'm not sure the metal tang is behind that metal piece. Again the manual doesnt say. Thanks for any help.
  20. Is it a wise or a waste of money to replace all the bearings, even if they are in spec? I have the engine apart to replace piston, rings, cam chain. It is a 2001 XR400 that was in great shape before being stolen 1.5 years ago. I recently recovered it and while it started up it took a lot more kicks than it used to. Used to start up 2 or 3 kick all the time. Checked compression and it was at the border of ok.
  21. lukerpm

    kx250f not starting after rebuild

    Hi guys. I have a 2011 fuel injected kx250f. I just put a new piston in it and adjusted the camshafts and valve shims. they are all adjusted perfectly in spec. I have put the bike back together now and have been trying to start it all day. It has spark and compression. However you can hear air coming back out the air filter when kicking it over. every around 10 kicks it backfires but doesn't start. Any help would be greatly appreciated
  22. Dirty' n Ridin'

    Rm85 no compression after rebuild

    So I am rebuilding my 2007 rm 85 I rode it for a good 8 hours and started noticing low compression so I'm like I going to rebuild this bike so I start remember this is my first time rebuilding anything I follow instructions , finish and I fill it up with coolant and it's leaking so bought new gaskets redid all gaskets and a kick it and it runs but one problem there's compression but not a lot and there less power please help?!
  23. I'm looking for some advice about the wear that I found on the center of the camshaft and the opposing surface on the head. Could I clean up the head? Would it be negligent to re-use the camshaft after smoothing it up some? The thing still ran pretty decent actually—it just smoked and leaked. Images attached.
  24. EDIT: ACT sorted me out after calling them. This is not trying to defame them, just trying to get my bike running before Friday. Their sales department is great, they're sending me the missing gear priority and are comping the taxes and duties. Can't wait to finally ride my bike with the ACT box. Hey all, I ordered an ACT gear set to put in my 470 stroker, but someone &%$#@!ed up royal and they sent me two third gears....not sure how low your IQ needs to be to make this mistake, but someone did...my mistake has been that I couldn't imagine someone being this stupid, so I never checked. I'm leaving for a bike trip this friday, the rest of the rebuild had been done and it was just about to be put together. Does anyone have a spare set laying around, or the 22 tooth fourth gear? I really don't want to rebuilt it with the old box and having to re-do the whole thing.
  25. Hey guys Im new to this site and ive got a problem i hope you guys can help me with. I've got a 2000 yamaha yz125 that i just did a full engine rebuild on and long story short i cant get it running. Its got spark and getting some fuel. Also the carb is shooting fuel out the overflow hose on the bottom and i took it apart and found a oring in the needle seat was ripped so i replaced it and it is still shooting fuel out of the overflow. I have put fresh fuel in it and it didnt make a difference. Where should i start to get the bike running and fix the carb. Thanks
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