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Found 135 results

  1. I found a Magnum 290 kit on ebay for my 09 yz250f; thought I'd give it a try. It was $400, figured that's not too bad for cylinder, piston, and gaskets. Advice #1: After you take your current piston off; put the new jug on with the water jacket dowel and the two steel dowels in place to make sure everything is going to fit right. Make sure the castings are perfect so it fits down nicely and flat. Mine were a bit too tight in one spot, and I had to dremel just a tiny bit off a steel dowel hole edge for a good fit. Advice #2: Be super careful about stuff dropping into the motor, take your time, cover the motor very well. Advice #3: The four head bolts? they are different lengths, note which goes where. Advice #4: Put the exhaust cam on first, then the intake. Advice #5: Measure your valve clearances as you take your motor apart. Otherwise you have to put it together again, just to see you would rather have shimmed. Advice #6: Put those metal clips into the cam caps, then put the cams into the caps (carefully getting the cams into the clip properly), then hold the cams as you put them in the head Power does seem to be increased everywhere. It's a noticeable increase. I had heard that it signs off hardcore up top; maybe I didn't rev the crap out of it because it was the break-in ride, but I didn't feel that. Is it a mini 450? Is it a 450 slayer? No, I mean, in the right hands it could be; but a 450 is still faster and even if you can be even with them for a stretch, then you have to shift. Mine doesn't feel as fast as a Husqvarna 350. It feels like a strong 250f, but still a 250f. Maybe now you can be one gear tall coming out of a corner, but not almost any gear tall like on a 450. The increase is noticeable and welcome though. It felt strong and I liked how it ran. I recommend this kit, it felt great.
  2. I have a 2016 YZ250F. I ride/race MX. I'm looking to wake up the motor a bit and am looking at different exhausts. I haven't been able to track down a good pipe comparison for my bike - The best I've found is an MXA shootout for 2014. That shootout rated the Yoshimura the best but gave the pros and cons of each pipe. Is there a pipe shootout for my bike that I just can't find, or am I stuck with digging up individual reviews? If so, could somebody please send me links to some of the reviews? Thanks in advance.
  3. I'm looking for and aftermarket clutch for my 2001 YZ250F that's I've done sone aftermarket work too . I'm looking for tips , tricks , and brand information ,preferences etc . .. basically any intel thanks helpful . Thanks a lot , also I wanted to see what was up with a good aftermarket shock to put in . If they even make one for itandbsome susp bison tips etc , thanks again guys !!!!
  4. So here is the problem I am in; I want to freshen up my old 2001 WR250f, I currently have the Hurricane Hannah Graphics (Tells you when I last did this) in fact I got it by busting my butt for my dad when we were selling his house and he got the kit for me as a reward and we put it on (Great Memories); but back to being on topic. So I am searching online and I noticed that the pickings for a WR especially a 01 is about as good as a finding a women at a all male school right now. So I was wondering since the frame is unchanged until 2007 when they went to the Aluminum frame does anyone know if the 2001-2006 plastic will bolt on? Cause I want to find the Yellow Plastic again, as I am a huge fan of the old Yamaha graphics kit as you can see from my YZ250x and my 01 WR. Does anyone know who still makes yellow plastic for this old bike and if the 2001-2006 plastic (with minor mods as my 2001 YZ250f plastic that's on it needed a bit of modding) will fit on the bike? Thank you in Advance!
  5. https://www.youtube.com/watch?v=pfIu-RXWiV0 Please tell me how you think this bike sounds? 96hours on it
  6. im am 13, 100 pounds (with gear) and currently ride a 08 yz85 and am looking to move up. first off im not rich and i have to pay for my own stuff, i am not going to be racing i mainly just ride track and trails here and there also some desert sinlge track. i am debating on witch i should get next a yz125 or a yz250f. i can handle the power i have riddden both a 125 2 stroke and a 250f and i basically fell in love with both so i am in a predicament on what whould be best. anything helps
  7. The bike has spark at the plug when grounded on the engine but not much. I have a wr250f so I compared the two. The wr has much more, bright blue spark, yz - you can barley see the spark. I switched plugs and coils between the two bikes, same result. The bike will start and run for 30-60 seconds and then die. If you crack the throttle it dies. I have checked the ohms from the stator. It all checks out with my multi meter to be within spec. I have check all connections, disconnected the kill switch. Nothing makes any difference. I have researched and read every article. Before I start buying parts and switching them out I'm open for suggestions. When the bike quit and we got it hope, I noticed that there was a hole on the radiator hose and there was no water in the bike. I figured it had run hot and melted the piston. I checked the valves. They were spot on. Pulled the top end off. The piston and cylinder looked okay. The oil rings showed wear so I put in a new piston and rings hoping. When I got it back together it was still the same. You can get it to start after several kicks but not for long. Could the heat have caused something to happen in the electrical system? Any advise will be greatly appreciated. From all I have read the cdi rarely goes out on these bikes. Thanks, Darrell
  8. I start my motocross challenge with 2011 YZ450F . although i had many years experience with heavy cubic MC , from the first start i underestand it have so much power . and the first try MX track was scary and i decide to sell it . but as i am a stubborn person , i keep pushing and learning whit this bike . + mapping it as soft as possible and now i am getting better . last weekend i tried a rmz250 and was amazed how well i can drive it, but i didnt like it there was no power in it . now i need help : my friend suggest me to change to a 250 2 stroke : so how dose it feel to change from 450 4t to 250 2 stroke !? it is getting even harder !? or should i just not give up and keep pushing and learning with a 450 !? or maybe i just go to 20 4 stroke !?
  9. Hi, I'm looking to buy either a yz125 or yz250 upgrading from a yz85. I'm 16 years old, i'm 6'2" and weigh about 145lbs. I'm upgrading from the yz85 because the frame is too small and I've outgrown it, plus its a little weak. I would like to get a yz250, but they are pretty pricey and my budget tops out about $1500. I found a good deal on a 2009 yz125 ($1300), but I'm wondering if there isn't enough power? I'm not really going to be racing, I might go to the local track for practice every once in a while, but nothing crazy. What do you guys think? yz125 enough power for a 145lbs teenager? Or is the yz250 the better option because of the 125's lack of bottom end power (i'm used to this with the 85)? Thanks!
  10. 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.
  11. I have a 2009 yz250f with Hot Cams and it is in dire need of a valve adjustment takes about 30 kicks to start and I am planning on doing it myself I just need the correct valve shim kit and I don't know what size kit to order so I was hoping some of you guys could help me out, and the bike has a big bore kit so it is 290cc idk if that matters but please help!!!
  12. Hi Folks! I decided that I am tired of my 06 WR250F having horrible damping (i.e. none at all) and so am going to upgrade the suspension. My questions for you are, 1. Is it worth it, given the age of the bike and cost of the parts, to find old 06-07 YZ250F SSS twin chamber forks and shock and rebuild/upgrade them, or just install a gold valve or similar in my single chamber WR forks? I like the idea of bolting on YZ TC forks and shock, but the cost at this point for them both runs about $500-$600 and they are guaranteed to be clapped out and need a full rebuild/upgrade, just like my WR forks/shock. 2. Race Tech offers a compression gold valve available, but not a rebound gold valve. Can you tell me why this is? I would like both, of course. 3. Will YZ450F components work as well? If so, what year range? 4. Ohlins drop in cartridges look awesome, but front and rear would cost the worth of the bike ;-) Thank you for the help!
  13. I am in the process of street legalizing my yz250f and am currently looking around for tires either street or dual sport tires, I was hoping someone could help me find stick sized tires that are mainly for the street but if know of any dual sport tires that would work too! Thankyou!
  14. Hey guys, so recently I've noticed that my front pro circuit suspension is stiffer than hell. So I read on it and it said that sometimes it's because the front wheel is misaligned and the forks will not sit right. So I put the bike on a stand bled the suspension and got the axle nut loose and the pinch bolts, and every body said to push the suspension down or even press the brakes a few times to help align the wheel. I made sure to tighten the axle then tightened the pinch bolts. But when I tried to push the suspension down while everything was loose it barely moves at all because it's so stiff. I even tried putting the bike on the stand and turning the clickers counter clockwise to soften them up but they were out of adjustment. What do I Do? How do you guys realign the wheel? I've got a riding trip coming up soon and need as much help as I can get. I'll try to add a link to video I found of a bike doing the same thing.
  15. I’m looking into flipping a 2001 yz250f (because it’s cheap.) and I wanted to make it look like a 2019 (or just newer). Is there anywhere that makes a restyle/update kit for something that old? There’s also a 2003 i’m looking at but it’s blown rather then just needs a valve adjustment. Would that be a better option?
  16. Anyone know where I can get a shorter kick starter for 2009 YZ250F - want the faster spin to help starting. Happy to look at another bikes kick starter or modify stock version or buy an after market shorter version. Just cant find any options at the moment.
  17. just bought a 2012 yzf250 yz250f and when i try start it after a night or so of it being in the shed takes around 50 kicks to get it started and without the choke on. by cold i dont mean cold temperatures. when i start i give a few blips of the throttle, try to start with choke nothing happens. turn the choke off give it 20 kicks or so and will eventually start. previous owner had pulled the carb apart to clean it so i wonder if he had put it together wrong that could be the problem? will start fine when hot and a few hours after riding. could this be something to do with carb jets being wrong or even valves? cheers
  18. I just put an fmf powerbomb on my 2006 yz250f and started it up a few times and have began to hear a slight tick in the top end. I also turned the bike over maybe 20 times without starting it to test for air leaks in the exhaust. Could this have caused too much back pressure and thrown off my valves? (the muffler plug WAS in). I know the normal 4 stroke engine noise, but this doesn't sound too normal. Could you guys take a listen and let me know? Hoping it's a normal sound. Any help appreciated! Video of sound:
  19. Hey guys im coming of a 09 250f and looking to upgrade to something newer and I’m torn between a yz125 or a newer fi 250f im 6’ and 180lbs and ride only Moto cross. The local tracks have everything from deep sand to hard pack. any help in making the decision would be awesome tia
  20. I own a 2006 YZ250F and currently it has 88 hours on the motor (total), so I`m going to tear it down. About 80% of those hours were logged in the woods. I change the oil and clean the air filter every 6 hours. I typically don`t rev my bike out as I`m only 130 lbs. My question is should I replace the crankshaft? I`m not really sure if it is necessary, but I would like a second (or tenth) opinion. Thanks
  21. I have freshly rebuild my top end on my 2009 yzf250, new intake valves piston and rings, cam chain. I put it all back together ran mint, but after starting it up for about the 3Rd time a loud knocking noise from the engine appears, the bike is still running fine although a very obvious loud knocking noise. valves are all inspect aswel. note, the knocking id only at one certain compression stroke its past TDC its a short stroke but quite a difficult one, never had even put it in gear so i dont think it is the trans. i also ripped out the cams a couple times thinking that was the problem and once i put it together it ran mint for about 4 seconds then knocking came back. I originally thought it was the exhaust cam decompression sticking but after inspection was not making the nosie. I took the flywheel off and checked if I had put it wrong, but no. have just tore apart the clutch side cover and all teeth are fine. I am at a point where I don't know what to do next. please any advice is much appreciated.
  22. Hi all. New/old rider here. Im 37. Havent raced or ridden for that matter since 2000. Got kids now. One on a 2018 CRF50. Hes 6. So I got a bike to be able to ride with him and maybe get into racing again for myself. Found a clean 19 hour 15 YZ250f. Bike is in immaculate shape. BUT...... What is the trick to get it to start easy?? Something seems wrong. I have been watching youtube videos about the 15+ YZ250F's and other 250F bikes and they all seem to start with one kick. No need to find TDC or anything like that. Warm or cold. With mine its very sensitive about starting and needs to be at TDC no matter the temp. Its very annoying. First time I tried to start it, it took 20 minutes and I was already tired. Then I went looking for info and found about all this TDC stuff. And that would be fine if I wasnt seeing TONs of videos of people getting their new 15, 16, 17 YZ250F's and starting them in one kick. Something has to be wrong. This bike is 2 years old with 19 hours on it. Original owner said it was maintained very well. Didnt get a chance to ask him about its starting, and I dont want to bother him. But it seems wrong. Its not like its a 2000 or something with 150 hours on it. What could be the issue? Valves needing adjustment? New plug maybe?? I have no issue getting it to the dealer for a valve adjustment. Just wondering what others think. Thanks.
  23. I've searched the forum but can't seem to find anything useful. I've been experimenting with fork heights and bar positions, etc. to get a better feel when cornering the bike, but something about the handlebars just doesn't feel right. I've been looking around at different styles but not sure which one to try. I'm 5' 10" and pretty much just a weekend warrior, riding trails and tracks. I think I read on one thread that people have like the RC bend on these bikes but it seems the bend is different from brand to brand and model to model. What have others had success with? Thanks.
  24. I have just bought a 2005 yz250f from a guy who said its timing was off and thats why it didnt run. It was off, so i retimed it. I know i did it correctly, as i spent a lot of time reading up on the procedure. But now it still doesnt want to start, i kick and kick and kick, but nothing. So i thought maybe the plug was bad, it was not. I have cleaned the carb in and out, but still nothing. So i got to thinking I'll try to bump start it, it started to fire, but sounded like it was running dry. Wouldent respond to the throttle, and would only fire as long as you pushed it. I put gas directly into the carb, and it fired for a few seconds then quit, any ideas?
  25. Hey guys, I know the sign of a bad bearing in your wheel is if it kinda has any play if I'm correct? I replaced my back wheel bearings and didn't worry about the front ones. I know this may just be a suspension problem but when I land from a wheelie or jump it is really stiff. Way more stiff then I've ever felt. It just feels like the wheel is stiff. Any ideas? I've already messed with tire pressure.
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