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Found 43 results

  1. I recently ran into clutch problems on my 2006 yz85. The clutch would literally have no effect. So I took the cover off and realized the the inner and outer hub were in pretty bad shape. So I decided to order them. On top of that the plates were bad too, so I ordered a tusk plate kit. Everything came, I installed it and it still won’t properly engage. Even after putting oil in it and leaving it to warm up for 5-7 minutes. When I put it in gear there is still a slight resistance. I would say the clutch is engaging about 80-90 percent. All the new parts are oem except the plates. Could that be the problem? (I doubt it) I don’t really know what else to replace. The springs? Or pressure plate? Any help is appreciated.
  2. Hey guys, does anyone know what the torque spec is for the top cylinder studs on a yz 85? Thanks. Picture for reference
  3. Bike: 2012 Yamaha YZ85 Problem: bogged when riding now won't start So on a trail ride and my yz85 started bogging and moving slow than died. Now it won't start. Top and bottom end were done last season and run yamaha factory reccomended 32:1, always have in all my yz85s. I also recently had the issue of unused oil leaking from the exaust. I'm not sure if that's related. Some carb adjustments were done for that and it was set to factory reccomended setting. Any help would be great. I havnt checked the plug yet but that's the first thing I'm going to do. Thanks, Mac
  4. hi, i got some yz 80 2001 suspensions for about $ 60 for my ttr 125. i need to do fork maintenance. Can someone explain the difference between these suspensions with a newer model? These suspensions do not have regulation, only a screw to remove air. I once serviced my 2016 yz 125 suspensions, how different are the 2001 yz 80 suspensions? Any contribution would be very helpful 🙏🏼🙏🏼
  5. I have a small leak in my fork seal and I’m wondering if it’s normal. I tried getting in there and making a seal saver to clean it out but I’m having a hard time taking the dust seal of while it’s on the bike and I don’t see how putting it on a bench will make it any easier. Should I try harder? Should I even worry? It’s so small you almost can’t notice it unless you wipe your finger on it and it gets a little slicker. I hope this makes sense. Thanks
  6. So I am in the market for a yz85 dirt bike. I am looking to buy a used one and I don’t know what to look for or to stay away from with these bikes. I am completely new to two strokes so I don’t know how to tell if it is running well or any signs of damage on the bike. Any info or tips on the buying process would be appreciated. 👍
  7. At the moment I’m in an 85 big wheel and can easily flat foot both feet. I would prefer a 125 but not many are available, whereas 250F’s on the other side are looking closer to my price/availability range than 125s. My only hold back in a 250 is would it be too heavy? I weigh approx 130 lbs (60kgs) and am around 5’9. Would I also be better if adjusting the shock and forks on my 85 and stick with that for longer. Any help would be appreciated
  8. Just out of interest, I ride a 2012 yz85 big wheel, and I have just turned 13 but im quite tall (5'7) and weigh around 55 kilos (120lbs). I have had the bike for about 8 months now and want to move to a newer model 85. I was wondering if it would be worth hunting the market for another one or just to stick with what i have got. The main reason i want to move up a couple of years is because parts are so much easier to find. I don't race mx (don't have the time) but ride trails and on practice tracks. Id appreciate any info. ??
  9. Hello everyone, I have a 2004 yz85 thats not running right i am using the original carburetor that came with the bike and i rebuilt the whole carburetor including the floats. Every time i start it up it runs high idle and when i turn the choke off it revs up high then dies. Please help me
  10. I learned my back break already and do good wheelie in 1st gear and can find my balance point how to i do wheelies in higher gears i dont know how to get the bike up in higher gears to do faster wheelies?
  11. Jumpingjax10

    ttr125 or yz85

    Hi. I'm looking for a bike for an almost 15 yr old boy. He is 130lbs and about 5'5. He road a ttr90 until it obviously got way too small for him. I like the ttr becuase it is a 125. Also, he will rarely be riding it on a track and 90% of the time will be on trails. But I like the 85 because it is faster and it is a two stroke. What do you think? Thank You.
  12. I bought a 2007 yz85 with a locked up connecting rod bearing and i bought an engine with a new crankshaft because i didnt wanna open up the engine but ive had to transfer all the engine accessories to the new engine but when i put the clutch on I was sure I did it right and have all the parts in there but when I put the pressure plate on Its hard to push down and stays up like its not aligned correctly but i know it is because it goes down when i screw the clutch bolts in but theres about 1/8in of space where the clutch plates can move if I push on them so thats making it slip(this is still happening with the cable disconnected). I figured the rebuilt engine already had the ball bearing in the clutch so i didnt need the one from the old engine so I took it out but now the rod that pushes the pressure plate is about 1/4in from touching the pressure plate and barely touches it when I pull the clutch lever.
  13. I have a '02 yz85 and today I replaced the right side crank seal, head o-rings, and swapped out the head for a VHM performance head. I also put a FMF SST pipe on it with a FMF Shorty. The bike has been working perfectly all day, other than running poorly since i need to rejet. But no other problems then that. I came into the garage about 5 hours after riding, and noticed that when I turned the kickstart over, theres some grinding noise. It did not do this after I put it back together, it just started out of nowhere. While I was putting the clutch back together I noticed the shaft the clutch goes on moves in and out, I called my friend who has replaced the clutch on his 85 and he said it was normal and his was the exact same, so I didnt worry about it. After I put it back together it was not making this noise, and didnt make it after riding either. Just started out of nowhere. Heres a vid to show what it sounds like. I don't remember it ever making this noise. I took the clutch apart to make sure nothing was wrong, I didnt find anything wrong except a little gasket maker that got onto the clutch since I put too much. Doesnt feel like theres any resistance while kicking it over, in the video the spark plug is out. Help?
  14. Hello everyone, I have a 2003 yz85 that seems to have issues at around 1/4 throttle under load. It makes starting from a hill damn near impossible, although starting from flat ground is no problem. Spark plug is fairly new and the color looks good on it. I just rebuilt the carb completely with all new stock jets, needle clip was on the first clip (full lean) so i left it at that. It has a airbox mod, Twin air filter, and Pro circuit silencer so its possibly too rich and needs a larger diameter needle? It idles and runs well, rips really well in the powerband, just seems like it struggles to do hill climbs if it falls out of the powerband while doing so. Also on a unrelated note the clutch arm seems to not want to return fully under its own spring tension unless the clutch is fully pulled in and then released. I think it may just need the spring replaced on the clutch actuator arm but i am not sure. I am also unsure how to remove the clutch arm in the first place. Any help with these issues would be greatly appreciated. Running 93 octane at 40:1, trail riding only no track use. Not sure when the last top end was done on it, it was probably awhile ago but compression still seems good. Edit: forgot to note I am running +1 tooth on the rear sprocket, although now I think I should have added 3 or 4 teeth to it and this wouldnt be an issue.
  15. I have a 2002 yz85 and when you start it up, it will idle really low then once you rev it up a little, it will start to idle normally but then after a couple seconds it just drops back down to a really low idle like its about to stall out. What could be causing this? After doing some research it sounds like it might be a crank seal leak, but i really hope not. Could it be anything else causing this? And if it is a crank seal leak, would it require splitting cases to replace? I also just cleaned out the carb and put fresh 32:1 in it.
  16. I bought a 2002 yz85 about 1 1/2 weeks ago and it just isnt running right. Firstly, it never starts without choke, NEVER, my friend has a yz aswell and it starts 1 kick no choke or anything so I know something must be wrong with mine. Once you put the choke on itll start in about 2 kicks. Once its started, it does not idle by itself until it is warmed up good. And it also takes forever to warm up if it is not warmed up it bogs down alot. Once it is atleast a little warmed up you can start to ride it but it bogs alot while driving. But I am confused on whether this is running too rich or too lean, or if this could just be old gas. If it was rich it would start alot easier, but if it was lean I know the engine would get alot hotter quicker rather than taking forever. What could be causing any of this? could it be just old/bad mix gas, a clogged up carb, weak spark, or something with jetting, or could it just be not warmed up good enough? This is my first two stroke bike so I dont know what could be causing this. It also bogs alot while driving.
  17. I picked up a pretty roached out yz95 for my kid. Replaced almost everything, rebuilt motor, boingers, brake lines all that jazz. I'm looking for some baseline jettings settings or recommendations. Last time I took him out riding, we went to a play pit area in central oregon. He could ride for about 20 mins and plug would foul? I'd pull the plug, and it wasn't covered in oil like I would expect. (I've been fuel injected myself since 2011 so kinda out of touch with the carbs.) Wasn't light brown though either like it was too lean. I'd throw a new plug in and it would start right up. Gonna pull the jets tonight and see what's in there. But just looking for some baseline settings or recommendations if anyone has any. TIA
  18. Hey guys, I've used this forum as a "guest" for awhile now and I thought I'd share my build now that it's all coming together. The primary purpose of this project is to help me train for roadracing my 2009 R1 at lower speeds as well as giving me a cheap alternative to racing the big bike. Here's what she looked like when I picked it up from a local shop. Paid $800 cash for the bike as you see it with 17' rims, FMF pipe, EBC 250mm front rotor and clip on handle bars. Fits PERFECT! Shake down run at the Herrin Compound last summer: As she sits today:
  19. Hey guys, I bought this YZ85 and came to realise the clutch wasnt working, so I drained the oil (Jet black) and pulled the plates out and cleaned them. I assumed finding a torque wrench would be easier than it has been. Does anyone know how to torque the clutch springs to spec without a wrench? Any insight helps.
  20. Please help! I recently bought a Yz250f and have not been able to start it, it Has spark, but there are many issues with the carby which I wanna rule out before I leap into a rebuild, ( I want to avoid a rebuild if possible as I’m low on cash). The carby at the moment is a complete mess so the usual steps to fixing it might not work. So here’s the deal with the carb: - It’s leaking fuel from overflow ( really fast! ) and when I mean really fast, I mean it emptied my fuel tank in 2 mins. - It has a slow leak coming from somewhere under the float bowl - the air fuel screw is not adjusted correctly - I don’t know if the electrics work on it either - I don’t even know if it’s shooting fuel into the cylinder or not, as after kicking it a couple times and it’s not starting I remove the spark plug and it’s still dry. ( I tried putting fuel directly into cylinder from the spark plug hole but the bike still wouldn’t start) okay so I know it’s a lot but I’m not expecting anyone to answer every single question themselves. If each person could tackle whatever problem they know it would help heaps. Also just want to know what Order to fix things in as I can’t do air fuel until the bike is running and it won’t run unless I stop the leaking and get it to spray fuel into the cylinder. And buying a new carby is not an option ( I’ve got $40 to my name atm). Please help guys thanks.
  21. I bought a YZ250F yesterday and the previous owner said apparently it runs but they weren’t strong enough to kick it. I couldn’t kick while there so I took their word for it and bought it. I’ve been trying to get it to fire all day today, there are 2 chokes and I’m unsure if the air mixture is correct, so would be nice to know what I should do, it’s hard to adjust the air screw when the bike won’t even run. I noticed the spark is kinda low, I don’t know if it’s normally supposed to be like that or not. I can see a blue spark but it is very small and crappy, I’ve had thumpstars that generated stronger spark, I changed the plug it’s still the same, so maybe could be an electrical problem, the only ground connection I could find was for the ignition lead which I filed down to bare metal so I’m pretty sure that connection is good. Anything else I’m missing? It’s very hard to kick and I can feel the compression out of the exhaust so I don’t think compression is the issue.Just wanna know what I should do, haven’t owned a yz before so I could be not using the choke right or something. Thanks
  22. Hello guys I have a 2017 yz85 and naturally they come very rich from the factory and kept fouling plugs so I jetted it down to a 135 instead of stock 138. It ran great until I put a new air filter on (maxima pro filter) and I blew a hole in my piston. I didn’t think it would lean it out that much. I rebuilt it with a wiseco piston and I jetted it up to a 140 main and I’m not 100% sure on what the plug should look like. Mine looks like this. Any help would be awesome kind of a noob with two stroke jetting.
  23. I recently bought a yz85 in great condition it just needed some carburetor work (the float needle did not seat properly). Now that that's fixed, I have a question. The bike is an '06 and the owner said "yeah it's still on the stock piston probably only has about a hundred hours on it" I cringed when he said this. But, nevertheless, I took a test ride and decided to buy the bike. When I kick it over, the compression is average for an 85 and it starts 2nd or 3rd kick cold and first kick warm. When riding it, there are no strange noises and I can hear no piston slap or anything out of the ordinary (listen to it in this video: https://www.youtube.com/watch?v=nx0VislGsg4&t=4s). I know a top end rebuild is a must on these 2 strokes so how has this bike lasted 12 years and still sounds like it's new? It doesn't bog, the only thing I have noticed is that it will hesitate while taking off sometimes when it's hot. I know I'm going to get the average "PUT A NEW TOP END IN IT NOW" 2 stroke guru, but is it really necessary? I have not taken the cylinder off yet but I put my finger over the spark plug hole and kicked it over and it has enough pressure to lift my finger but it's also really oily in there (oil ring left on my finger). So, what do you guys think? Does she got a few more hours or does it need a new piston ASAP?
  24. My 2006 yz85 leaks oil when I crank it up and leaks while I’m riding and after I get done until it eventually stops. It’s NOT the clutch cover gasket it’s the gasket behind that (crankcase cover gasket). It drips substantially (a drop every 30 seconds while turned on, and slowly deteriorates after I turn it off. Is it an easy fix to replace that gasket and is there any way to seal the leak without a new gasket?(although I may get a new one anyways.)
  25. Hi, I am 13 years old and I am trying to decide what bike I want to get (two stroke of course). I'm 5'2 - 5'3 tall, and I weigh 125lbs. I'm a beginner at this, meaning this is my first bike but, I have ridden a dirt bike a few times. My choices are the yz85, cr85, kx85, kx100, sx85, and the sx105 (Yamaha, Honda, Kawasaki, or Ktm). I am not interested in the rm because I just don't like it. It seems like a cheap crappy (sorry if I offended you) and it doesn't seem to have the speed and power that I want ( at least that's how people describe it to be). So please don't include it in. I am going to buy a used bike on Craigslist or somewhere because this is my first year and I'm not the richest of families (in case that helps.) Right now, I'm confused about which bike to get because they're all good brands. I want to be fast on the track (obviously) and I want to be aggressive. Which bike will fit that role? Can some also explain what top end and bottom end power is and what it helps with when you are listing a bike? Can you include the pro and con of it? I'm also not sure if an 85 is the right size for me, as I want to grow into a bike and have it last me. Maybe I should get a 125, if is so, which one (again, no Suzuki rm)? I'm going to a dealership to sit on some and try some (not too sure about trying some) Saturday but I just want thoughts about this. I don't know ANYONE with a dirt bike so the internet is my only friend here so I am really counting on you. My mom doesn't know anything about dirt bikes or the sport so I have to really look at this stuff myself. If you have any tips, please leave some as they will be helpful for me or any other onlookers in the same situation as I am in.
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