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Found 39 results

  1. 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
  2. I'd like to say that I really appreciate all the help from this forum. It is amazing. I tried searching for a previous post on this problem and cure but didn't find a match. Found something close which leads me to think that the fix will be more costly. So I'm asking to see if there's a chance at making this easier and less costly. My son's yz 85 recently had a problem with the clutch not disengaging. Checked the cable and it moved freely but noticed the push lever wasn't always returning back with the spring action. The spring looked intact. Thought there might be something in the clutch keeping it from moving back. Not sure what would do that but took it apart anyway. Everything inside looks good. The plates, fibers, basket, hub both push rods, ball. Some wear on the fibers but good. With every thing out the push lever still wouldn't move freely. So on the left side I took the chain cover off and see that the chain must have gotten so loose that it started to hit the crankcase where the push lever is. I guess it's pushed the case in enough that it's binding the lever. Whose case is I have to change the crankcase. Has anyone ever experienced this and is there an easier/ less expensive fix? I haven't tried to remove the push lever yet. From other posts it sounds like it should come out fairly easy. Thanks for all the help!
  3. Hi guys. I am interested in starting dirtbiking. I have cousins and other relatives who dirt bike and I am moving to an area where it is common to do it. I have ridden four wheelers before and enjoy driving high performance go karts. I am about 4 10 and am torn between a yz85 and an xr100 for a first bike. I wanted a xr100 but my cousin suggested a yz85. I will do both trail and eventually track once I build up some skill. I want a bike that I won't grow out of in 3 months. I am open to other suggestions.
  4. So I have a 1998 Yamaha Yz80, and I need a new top end. I found a 2002-2017 Yz85 piston kit, for a very reasonable price, and I was wondering if it would be able to fit my 98 Yz80? Would the piston, wrist pin, bearings, rings, Etc be able to fit? And will it work?
  5. Hi, brand new to this forum so excuse me if this is in the wrong section! We got a 2002/03 (unsure), yz85 a couple of months ago. Very few issues at the start, ran perfect. In the past two months the bike has been very temperamental. It was idling very high when it started but alot of the time it wouldnt even start. Was making very throaty, burpy kind of noises, especially with a bit of a throttle twise to try and get it going. So, after pulling the carb to bits, cleaning all of the jets, itd run once well, then do the same thing again. We repeated this process 4/5 times to date. We eventually routed the cause to a frayed intake boot causing a vacuum leak. So we replaced it. Good as new. For the first run.. kicked like a horse the first time we ran it after replacing the boot. Then today, she's back to her old self. Started fine earlier, and then just went throaty and started to die. Sounded like the plug wasn't firing. So took it out, checked. Nothing, check if there was power to the coil pack, got a spark, so cleaned the plug with a wire brush (b10eg, btw) Away she goes again, for 2 minutes, and dies. Back to making throaty sounds again. The plug is working as of now. The bike would start if the throttle was wide open but be very very throaty, burpy and rough. Carb was cleaned earlier before this. (Today) That's all the detail I can give, any questions feel free to ask me. I've given up on it as I'm all out of ideas. There was a bit of black oily stuff leaking out of the exhaust as well, only noticed as I was finishing up. Any help, ideas, suggestions are welcomed. I have a video of it but can't upload here. Thanks in advance
  6. 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
  7. 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.
  8. Ok guys I got a 2002 yz 85 been sitting about 5 years in my friends back yard. Carb looks clean but over reving, any ideas what the could be?? Hoping for a simple fix but maybe vaccume leak???
  9. 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.
  10. 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.
  11. 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?
  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. So, I have a 1998 Yamaha yz80, and it's had a lot of hours on the top end, so it's time for a rebuild. I have a neighbor who is going to help me with it, so i havent taken it apart yet. I'm trying to figure if my bike needs a whole new piston kit, or a gasket kit, or does it need new reeds? So its lost compression. Way less then what it used to be before. The bike is really hard to start, and it fouls my plugs like none other. It doesen't have too much of a power loss, although, the powerband has become weaker. I just want my bike to be running like how it used to be, and I don't want to spend a lot of money on it. It will start sometimes, but most of the time, it will only bumpstart. I appreciate you viewing this, now, so let me know of what I need.
  14. 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
  15. 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?
  16. 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. 👍
  17. 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
  18. 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. ??
  19. 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.
  20. 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.
  21. 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:
  22. 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.
  23. 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
  24. 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?
  25. 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.
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