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Found 43 results

  1. 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.
  2. Considering a replacement throttle housing for my son's YZ85. Does anyone know if a Motion Pro Vortex or current OEM YZ125/YZ250 can replace the stock housing and tube?
  3. hi all, I just bought a 2014 Yamaha yz250f that is set up for a 120lb rider. the guy gave me the old fork and shock springs that were for a 180 pound rider. I have a friend who always bottoms out his yz85/105 super mini because the suspension is not set up right for him. Would i be able to put the springs i got into his bike. Both bikes has srs suspension. I know some spring cutting may be required but could it be done? Thanks for any help Luke
  4. 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
  5. I recently bought a used yz85 2002, runs well starts first kick every time, but i've noticed it has a problem with the clutch. When i pull the clutch in and start it while in gear it grabs and will drive as if im not touching the clutch. So i held the bike in place with clutch in and kept revving it and then it worked and idled, but then i let go of clutch and it stayed slipping and would not drive at all till i stopped the bike and went to neutral and back to first. I dont know what the problem is, my friend told me i have weak clutch springs and to replace it but someone online said that there might be grooves in the basket, please help though Ive never heard of a problem or had a problem like this with any of my bikes. thanks, payten.
  6. Hey I'm 14 and am looking to buy a new quad/bike. I am selling my yz85 currently I'll tell you what bikes I have owned/ rode crf50-xr80-yz144-yz85 kfx50-yamaha blaster-raptor80 and I've riden Polaris 500's and they seem pretty sweet . The riding near my house is, a bog, single track, power lines, mud and sand. I feel like a atv would be better for mud and the rooty trails but I love the 75+ mph speed from bike and being able to jump/throw them around. Some bikes/ quad I've been looking at, keep in mind I have about 1500-2000 crf250x all brand 250f's raptor 700 400ex 300ex another blaster? Please help me with suggestions. I'm 120 and 5'5 and I feel comfortable on a 250f I've riden a few. Thanks
  7. Ok, so ive got a 98 yz80, it runs amazing. Ill fire it up and it starts first kick. Idles great. Ill ride it, and its pretty good in the low end. But sometimes, if i open the throttle it will bog, it slows me down, could it be a rich bog, or a air bog? then ill just hold clutch in, rev it back up and itll be fine. Its not too big of an issue, but it sure is annoying. Im running 50:1, do i need to be running more oil, or could it do with something else?
  8. So I just did a rebuild on my 98 Yz80, and it wont start. At first, we put the gaskets on wrong, so coolant was leaking everywhere. After we fixed that, and put everything back into place again, piston went up and down smoothly, and it has great compression. The problem is, it does not want to start. Im not really sure what to do, because before, my compression was very low, so I did a rebuild, but now it still does not start. So I need help.
  9. I am 14 years old and am looking for a bike I am 5,0-5,1 I have a friend with an 07 yz 85 who is looking to sell it to me but I am worried about how it handles and its seat height. maybe a kawasaki honda suzuki or ktm I am also looking at the crf 150r. I want to do some racing and trail riding. I currently Ride a xr100 and love the way it handles on the track and on trails but it lacks a little power. any ideas thanks
  10. Hey guys, does anyone know what the torque spec is for the top cylinder studs on a yz 85? Thanks. Picture for reference
  11. 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 🙏🏼🙏🏼
  12. My had a small spill last week. Every since then his front brake is shit. It first it would work every now and then. So I decided to clean it up and get a master cylinder rebuild kit. Put new front pads on and fresh oil. This brake is completely soft. I feel the caliper pumping but just doesn't seem like there is any pressure. i bought a bleeder hose and decided to do a fluid change on his rear brake and that went flawlessly. I did my other sons front and rear rm 85 zero issues. So I know I am doing it right. but of the life of me I can't figure out what is wrong with this Yz 85. I'm at my wits end and am going to take a match to it soon !!!??? any ideas?
  13. Okay, so I've done EVERYTHING. The carburetor is a Keihin PWK 28 and it PISSES gas out the float bowl overflow whenever I turn the gas on. I've tried everything in the books. The float level is correct, so I know that is not the problem. The first thing I tried: the needle. I turned the gas on with the float bowl off while holding the needle in place with my finger. No leaks whatsoever. The second thing I tried: The brass overflow tubes in the float bowl. I took the float bowl off the carb, and filled it with gas. Not a drop came out of the overflow so I knew that these tubes were not cracked. One thing I did notice..... The bike leaked the least when the floats were at a really low level, however, this caused the bike to run piss-poor, as expected. What is with that? I also cleaned out the gas tank and needle seat and neither of these made any difference, the bike was still pissing gas. Now my garage smells like gas, I am angry, and my dad is pissed because the whole house smells like gas. Literally any suggestions will be appreciated. I've cleaned the whole fuel system, set the floats correctly, checked for any cracks in the overflow tubes, checked the needle rigorously, but to no avail. If you have ANY idea what it could be, please let me know! I know many other people have had issues with these Keihin PWK's, but I read all of those forums and tried everything it said, but nothing worked. I am totally lost and upset because I wanted this to be an awesome bike. Thanks for reading.
  14. Hi guys I need help. I recently bought a 2003 yz 85 two stroke and know about nothing about it. I stupidly attempted a wheelie and it flipped and then fell on its left side. Later that day I noticed pink fluid coming out of a small black tube in the bottom. The tube lead to the crankcase. Please help. I don’t know why it’s leaking and if it is causing problems.
  15. 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.
  16. 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.)
  17. I just ordered a piston kit for my 1998 yz80, and it does not fit into my cylinder. I can't really remember if its a 47.5 mm or 47, i'm pretty sure it's a 47.5 but it just does not fit into my cylinder. My cylinder does have a big groove in it, so do I need a new cylinder for it to fit, or a new piston? Please respond ASAP!
  18. 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
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