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Found 23 results

  1. I’m in the middle of putting the crankcase together on my yz, and i found that the crank isn’t centered between the two case halves... I only managed to find one mention of this issue on google and they just said hit the crank end with a mallet which won’t move it even a bit for me. Wondering if anyone has had this issue and if someone could explain how to fix It. I also found that when I put the piston and cylinder back on it doesn’t seem to be effected. Am I imagining this problem?? I just want to ride
  2. Hey Thumpertalk, new dirt bike owner and first time poster here. I've got a fair amount of experience working on cars, and some experience working in motorcycles, but changing this clutch cable is giving me a fit. I must be missing something? Model and year: 1998 YZ250 (I was told at purchase) Maybe I'm missing something obvious, but I need a new clutch cable. I undid a 10mm bolt holding on the clutch lever, slid it out, and removed the end of the clutch cable (looks like a little cylinder). I cannot see how to get the end of the cable through the perch(?), it doesn't seem to fit. I don't think this is an OEM clutch set up, or it's a different year than I think. I have seen a few '98 YZ250s on YouTube, but haven't seen a clutch set up like this. Any suggestions? I attached an image so you can see what I'm looking at.
  3. Hey guys, I've read a lot on here about the yz250x governor mod (including the 26 pager from late 15 early 16). Thanks to all those who did that ground work. I have also searched everywhere and not finding exactly what I'm looking for, but I'm new around these parts so bear with me if this has already been covered. My question is, it seems like the yz guys are putting in the x spring with 3 washers and saying it feels more x like. Then you have the x guys taking out one of the .8 washers and saying it feels more yz like. So I'm guessing it falls somewhere in between. But I have not seen anywhere that people have tried the yz spring in the x with the four .8 washers. If that has already been discussed, I apologize and maybe someone can be so kind as to leave a link. Just trying to wake the x up a little more.
  4. My yz is making a sort of thumping noise from the air box. The engine noise is fine when you’re close to the pipe but if you are closer to the air box it sounds really weird. I checked the reeds and they seem pretty good. Help?
  5. Stock yz250 fork base clamp shims of 14mm and 16mm have been used over the years. I am currently running one 14x.25 clamp for woods valving but I see stock was two 14x.25 clamp shims in 07 but then they moved to just one 16x.25 in 08 and on for a number of years. The extra clamp shim would let the stack flex farther I would guess. Would there be much noticable difference in running two 14x.25's vs one? Also does anyone run a stack with a 16x.25 clamp with just less face shims to soften it for the woods or is a 16mm clamp just too stiff?
  6. Thomas Durant

    Seized conrod

    Hey guys, I guys so my bike seized up not along ago and at first I thought it was the rings welded to the piston but it wasn't. My kickstarter was fully seized. I pulled the engine done and when I go the barrel off my conrod did not wanna move freely and I could not move it backwards or forwards at all. I was just wondering what this means, like what parts do I need to fix it?? I'd also like to know why it happened because I'm quite new to 2 strokes. I'm pretty good with the top part of the motor but not so much the bottom part. Thanks so much guys Tom
  7. Goon Rides

    2002 Yamaha YZ 125 Top End

    Hey TT! You all know me as that one annoying 15 year old kid that rides dirt bikes on the street for YouTube content. Well I bought a 2002 YZ 125 that had no compression, and I got it for cheap. So, today I fixed the float and went for a ride, but felt like enough was enough. I called my dad to come and help me take off the top end, and so we did. Be aware that I am a 15 year old kid, that has no experience with top ends, and am basing everything off one 17 minute YouTube video that was watched two weeks ago. Anyways, here's how it looks. Now here's my question... What size will I need to purchase? It is a 53.96 currently. Also, will I have to bore it out or is it good? Posted pics of the cyinder too. OR, I can do the 144cc kit. Eric Gorr is charging $450-$500 which is too much, any cheaper alternatives? Gary, where are you?? Two Stroke YZ Doc I need your help man! Thanks!
  8. I was wondering if the is a way to de tune a 450 or some modifications that you can or people down to make a 450 motor more reliable?
  9. Hi, I'm new to the forums! I'm looking at buying a dirtbike in a few months and not sure what to get. This will be the first dirtbike I've ever owned but I'm an intermediate rider from riding peoples' bikes every so often. I'm 5'9 184lbs and I'm looking at a 2stroke because of easier and cheaper maintainance and you can't go wrong with the powerband. I'm looking at getting an 85 either yz, rm, or kx. Most of the riding a plan on doing is ripping around in a field and occasionally some trail riding, nothing hardcore. Would an 85 be a decent choice? Thanks
  10. yamaturkey12

    1994 yz250 parts!

    I have a 1994 yz250 that was going to be a project bike, but I am out of money and the will to continue working on it. Most of the parts are in good condition. I will be happy to provide pictures of the part you need. You can contact me here or by text at 478-951-6306 I am still in school so I will respond as soon as I am able to. Thanks.
  11. Evan Dodd

    Is my clutch bad?

    On my dirt bike I can pull the clutch in and rev and it will move slightly when in gear. Also, it rolls forward a significant amount when kick-starting in first gear with the clutch pulled in. Also it is very hard to roll around in gear with the clutch pulled in. The clutch is adjusted correctly
  12. Dunepatrol

    18 YZ450F

    Question, new here, always reading never needed to post as most things are posted previously. I bought a 18 YZ450F and took it around the block ( motor not broke in) and accidentally didn’t hit the shifter hard enough and then hit the rev limiter in second gear. Am I fuqt?? Never broke a motor in before.
  13. Clayton Skarke

    97 yz 250 acts like the choke is on

    My 97 yz 250 has a 96 top end on it and I can't for the life of me get it to run right. It runs just like if the choke is on. It has great power in the low end but as soon as I get to mid range and up to top end speed, it bogs down and it won't rev out like it should. Every once in a while It will speed up and run decent but It seems like It has a hard time transitioning from mid range to full speed. It also won't idle. The odd thing is, is that the very first time I put it all together and ran it, it idled perfect and ran amazing durring the 5 minute test ride that I took it on, the next day when I tried to ride, it was instantly giving me this problem. I was running 32:1 mix in it but it kept fouling the plug so just for testing purposes I ran 40:1 in it, it still bogs but now at least it won't foul the plug. By the way, it's a brand new plug so that should have nothing to do with it. So far what I have done is changed the crank seals, I've gone through the carb(168 main jet i believe) and everything else checks out there, choke is working as it should, it has brand new reeds in it, looked over the stator, all electrical connectors, ground wires, nothing looks out of place ignition wise, replaced some worn power valve linkage and I've ran the bike with the power valve linkage cover off to verify that the power valve is working correctly. It also has plenty of compression. Idk if it's ignition, fuel, or a porting issue with the different year model cylinder but any advice would be greatly appreciated.
  14. 05Yz125ForLife

    Increase Yz125 throttle rotation

    Went riding with my nephew and relalized I don’t pin it as often as I need to. Checked my max rpm after my nephew rode my bike (05yz144) and the motor hit 14,640 rpms. I didn’t know to be happy or worried. I normally don’t see anything over 11-12,000 rpms. I got on it and noticed I was leaving some throttle on the table. I wondered if anyone has changed their throttle ratio so that you have less twist to WOT. The trails we ride have been opened up and there is more opportunity to be WOT. You see a lot of throttle tubes with mutiple cams for thumpers but what about 2t? Any downsides to consider? What ratio changes are common or too much?
  15. Hey whats up guys and gals , I am just curious and wondering to see what you guys hate about your dirt bike or a problem you wish your bike would never have. Just curious its for a school project and I just thought you guys could help me out. Thanks
  16. On my 1999 kx 250 the wheel spins perfectly but it is not centered on the swingarm it is about 1/2 an inch away on the left and about 1 inch on the right. How do I fix this.
  17. Just wondering what other bike brand rims will fit my 2010 yz250f
  18. Hello everyone, I own a 2002 Yamaha Wr250f. I bought the bike used with 160 hours on it and used it for almost 50 hours, mostly hard enduro. Everything was working fine with it, until recently, when I decided to check the valve clearance because I had the time and because most forums (and the repair manual) say that they need to be checked regularly. Also, I was curious if the performance of the bike would get better after adjusting the valves. Ive found that most valve clearances were smaller than what the manual says (measured 0.05 for the intake and 0.1 for exhaust compared with the specified 0.1-0.15 for intake and 0.17-0.22 exhaust). Bought new shims, installed them, made sure the clearances are within spec and started up the bike. No problems, easy start, good idle. After, I took it for a test drive. First hour of riding (trail, high rpm, hill climbs) I really noticed how the bike's performance was much better than before. Then suddenly, I started noticing power loss. Something like if someone was pushing the kill button while i was pulling on the gas. Like if a limiter was put in it and couldn't go above a certain rpm. Have no idea why. 1. I cleaned the air filter before the test ride. Did i put too much oil(spray) on it? I used Motul air filter spray before, which had a blueish color, so it was easy to see how much is too much, but now Im using Liquimoly, which is transparent. But then why did I notice only after 1 hour of riding? 2. Did I do something wrong when adjusting the valves?or when putting the top end back together? But then why did I feel the performance boost in the first 1 hour? 3. Could be something else, not related to the valve adjustment? I'm mechanically inclined, so I do what I can on my own using youtube, this website and the repair manual. However, I'm not a mechanic, so I have no idea what to do now. You guys have any suggestions/ideas? Please ask any questions that you need to know, so that you can try to help me. Thank you! Your help is very much appreciated
  19. I ordered a set of going racing radiator hose from eBay. I don't know the size of hose clamps to get. Can someone with experience tell me. Are they same as stock or what. Thanks
  20. So, I took my 03 yz250f out riding for the third time since I've bought it. I never had any overheating issues till today. After riding it around for a bit I stopped and I let it idle (which btw has a hanging idle) for around 1 minute. Out of nowhere it started spitting coolant out of the radiator and the bike was super hot. I dont know if it being 100 degrees outside and idling might have affected it or my jets are dirty which is causing it to idle high and run hot. Ive also noticed that the gas is boiling inside the 5 gallon desert tank that sits directly on top of the carb and pipe, and it remains boiling all the time I am riding. The bike does not overheat or spill coolant when I ride it. If It starts spitting coolant at idle and I ride around for a bit right away, it stops leaking. I opened the radiator cap and revved the bike, the coolant was spitting out and bubbling, however, with the cap on the overflow line does not spit any coolant or even air for that matter. If it overheats at idle, the coolant comes out of the radiator itself and not the hose. Could it just be these bikes do not like idling for more than a minute or is my head gasket blown? Why does the gas boil all the time? Anybody have any thoughts on this? Thank you very much!
  21. Rebuilding the top end on my 1999 YZ125, what is the best method of honing to bring back the cross hatches? What color Scotch-Brite? Green or red? Also anything that would help out a first top end rebuild, I see all these threads about people rebuilding the top end & it blows in a few hours. I do not want that to be my case, it seems so simple why are people running into complications? Thanks!
  22. Rohr144

    Yz125 jetting for summer

    I have a 2006 Yz125 that had stock jetting with 93 pump gas mixed 32:1 and would run perfectly when it was 50-70 degrees outside, at 1000 feet. Little to no spooge at all and power from bottom to top. Now it's 90 degrees in Missouri with humidity as well, and there was more spooge and bike was running richer (obviously). So I decided to lower the pilot from 40 to 35 and start running 25/75 c12/93 pump to help with any detonation. Then the bike would bog down low and through the mid, it would slowly climb but when it hit the top, then it would rip. I had brand new packing in the silencer, and after just 30 minutes of riding, spooge was already running out of the silencer. So I took the clip and moved it up one, to the second position. Felt like it fixed the bog a little, but still a bog down low. Also, after I get done riding and go to pick the bike up to put it on the stand, when I tilt it, some gas runs out of the carb. The carb has all new gaskets and everything, plus I'm positive the carb had never been opened before when I took it apart the first time after buying the bike. I'd think float is off but could it be off if it's set to stock? Oil also leaks out of the power valve. The bike has to be running rich, and I tried going leaner, but then I hit a bog and more spooge so I'm really confused. Top end has 12 hours and will be getting a new ring on the piston in three hours. Checked the reeds about 2 riding hours ago and they were fine. Here's a list of all the info. Any help is very much appreciated. Temp - 90 degrees Humidity - around 40% 1000 ft above sea level Gas - 25/75 c12/93 pump mixed with maxima k2 at 32:1 Pilot - 35 (stock is 40) Needle - stock. Clip is on second from top (stock is third from top) Main jet - 410. (stock) Pipe - stock pipe with pro circuit silencer Vforce 3 reeds Type of riding - mx, novice rider All Im really looking for is if some other Yz125 guys have a good baseline for summer jetting, or if anyone can steer me in the right direction.
  23. Drewbwislock

    Studder at 1/4 throttle

    On my 2008 rmz 450, at 1/4 throttle there's this horrible studder. It started about a month ago. The bike has about 70 hours on it i bought it later last year and never had a problem with it. The only thing that i changed on it was the header pipe it had the stock one and i tweaked it where it was making a weird noise so i replaced it with a stock one. Things i have tried............................ New spark plug Cleaned the air filter Oil change Checked the valves one exhaust is on the loose side but not out of spec. I may try injector cleaner but idk if thats ok for these bikes. Any help is appreciated thanks in advance