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Found 21 results

  1. Hey all back again with my 1989 moto 4 250. After putting a new carb on it it's really sputtery, it has new gas and I'm wondering what to tune on the carb to make it idle better. I've attached a video to describe the issue more. The bike is still work in progress but I think the video gets the point across. Thanks! Snapchat-1142015191.mp4
  2. Hey since you all were so helpful on my last post gonna start another one. The bike had 0 electric hooked up but the guy had a wench hooked to it. Couldn't find a electrical diagram online but I'm trying to make the lights work and the speedometer any tips for me?
  3. Can anyone tell me if a timberwolf wiring harness will interchange with a moto 4? Both 250cc
  4. It's a 350 1989 2wd has 14k mileage and it Needs work. I bought this for a couple hundred. It turns on but the foot gear shifter broke off and the person said its stuck in 3rd gear. When you turn it on it moves forward. How do I get it out of gear? Also the u joint is broken, how do I repair that? and seems like needs some kind of suspension work because I can move the front rims by hand. Lights dont work
  5. I just got an old YFM200DX Moto 4 and upon checking the oil in the rear differential I took out I assume the fill plug and it fished out old nasty oil. I plan on flushing the oil and replacing but was wanting to make sure if you drain bottom plug and just fill up to the check plug. Only thing I can think of someone filled it up by the breather on top? Plan on unhooking the hose and blowing it out tomorrow. I also do not have a service manual yet. Also right now the diff vent hose just goes up under the tank to nothing. Does it plug into back hole in the air box? Thanks
  6. I have replaced the battery, the solenoid relay switch and tested the starter voltage. I press the switch and it turns over for a second then makes a “whining” sound. The guy that gave it to me gave me the starter clutch for it and told me that he started it by being pushed and then dropping it into gear. There is no pull start on it. Only electric. I did find out that you can take the left cover off and wrap a string around it to start it. I just want to know if I should split the case to replace the starter clutch or use the either fix every time.
  7. Hey guys I have a 1986 Yamaha Moto 4 225 I was wondering if I could put different plastics on it I did a big bore on it and I can't get spark on it I just bought every electrical part for it I'm just waiting for them to come in I want to no if any plastics from another quad would work
  8. Any luck with manuals? I need a carb in the owrst way and am have gone down a lot of rabbit holes (over 90 tabs and counting). Factory calls for a Mikuni BST34/1 (I think, but need to check manual). I don't care what or who makes the carb, just need a basic reliable carb. No Racing etc, just puttering. I currently only have the cable with the round slide attached. Don't care if its round if I know what other parts to get to make it all function. Thanks for help, and listening, gonna go chase more rabbits I guess. Max
  9. Looking for a carb for 87 moto4 200. Just bought the machine and it’s got a Chinese one that’s not working right even after I cleaned it out. Looking for the original mikuni vm22sf.
  10. i have a 91 moto 4 100. has electric start only. for as long as i could remember we have always pushed start it. after riding for while you shut it off. you are able to hit the start button and it will start right up. anyone know where i should start with fixing this issue? im fixing it up for my niece. thank you in advance.
  11. Hi there, I am a new member and have never used a forum before. I own a 250 moto 4, has smoked since I got it. Oil consumption has increased, I removed the crank case breather pipe and have a catch can under frame at front. Smoke has not changed. also after more than 20 hrs use during lock down there is a very small amount of oil come out the breather. Compression seems very high, engine turns not too bad if stopped for up to 20 mins but much more than that it is difficult to turn engine past tdc. (poss almost hydrolocked?) if left for a couple of hours or more it then turns over easier. Also if spark plug is removed. I would have expected oil to come out when turning engine with spark plug out. I suspect oil is getting down valve guides? smoke is worst during warm up. The starter motor has not worked since before I owned it and I have modified pull start as the pressure on it was causing problems. I am about to check valve clearances this morning before I get going. I do not want to dismantle while lock down is on as I am using it daily. Any help would be greatly appreciated, Dave
  12. Hello, i have many questions but ill start with a few. 1. The yamaha 350 from 89ish- 93ish has this dual actuating throttle cable assembly. I can not find a replacement cable for it. One cable had rusted and broke. Do i need to update to the new carb style that has the single cable? If so this sucks because i just cleaned this one. 2. Has anyone found replacement struts/coil-overs for these moto 4s? 3. What cause oil residue in the starter gear housing? Is it normal? 4. Does anyone have a service manual? I hope to get answers to this stuff. Im the kind of guy that researches and never Have the opportunity to help people. Hopefully this thread will do just that.
  13. Hi all new to the forum I have a Yamaha Moto 4 champ (100cc?) (YFM100) so I've been trying to get this thing to start for awhile honestly I'm running out of ideas so I'll start with the things Ive replaced and done first it was not trying at all and then I put a brand new battery then the terminals broke so I bought some nice copper ones fixed that up so now battery is got good voltage and all that I have checked all the plugs cleaned everything off so anyway it still wasn't trying but I couldn't get the crank case off and I didn't think using fire was a good idea lol so I busted the crank case off on the left side(if you are sitting on it) wierdly enough the flywheel started spinning I thought it was odd but went with it then I replaced the spark plug still wasn't getting spark so I replaced the ignition coil then it was getting spark next the carburetor was really gross I cleaned it out still wasn't working so I in turn decided just to replace it with a new one so I did (PS I never figured out how the fuel lines hook up if someone wants to help with that to lol) also for good measure put a new air filter so then I pressing the button Everytime I replace something and nothing so then I think what if it's the stator so I have no idea what a good or bad stator looks like but me being to rough I broke the wires on the thing but still no changes the fly wheel spins gets compression (I think) getting spark from spark plug idk other tidbits that might be useful I don't have a clutch line so idk if that has something to do with it I do have the break zip tied in to bypass the safety feature also the throttle cable is in fact broken and I'm working on buying a new petcock for my gas tank because my current one is broke I have very limited money this is supposed to be a project before I go to school for welding and automotive tech so I don't have any money to get a mechanic lol but I'm pretty confident in my ability to do anything u suggest any suggestions are welcome I'll edit and submit pics
  14. So here's my situation.i picked up a super clean 225 moto 4 but the cdi has been cut off.i have numerous different cdi units and just can't simply afford to buy anything currently.im sure I can make something work I'm just seeking a little advise or ideas or thoughts. Any help would be greatly appreciated.thank you
  15. Rescued this thing from sitting in a warehouse the last two decades. Finally got it to fire, but when I put it into neutral to do so its now stuck in neutral, and wont shift no matter how much pushing, rocking, etc. Even with throttle it wont. Range lever on left side will go from H to L, but not to R, and this makes no difference on it being stuck in neutral. Any suggestions?
  16. Just purchased one of these and I have a few questions: Went to change the air filter and it fell apart, but there were two pieces of the foam wrapping the wire cage - Normal? In addition there was about an inch of oil in the bottom of the air filter box - again - Normal? The backing piece of plastic for the wire cage was laying in the bottom of the filter box and the bolt was also in the oil. I am also looking for a recommendation on what to do with the machine as far as maintenance, it runs well, shifts fine, needs a new battery, but what else should I be checking? The previous owner had it for over 25 years and does not have any records or memory of the last oil change or any other maintenance other than needing to replace the battery a couple of years ago and placing a car battery on the front rack and running wires to the starter. Learning curve is sharp, but looking forward to the experience. Thanks for your input.
  17. Hey guys I have a Yamaha moto 4 250 that was running great now all of a sudden I have low power. It starts up and idles great and engine sounds fine no knocking or ticking or anything like that. I can ride it and sometimes its like you flicked a switch and the power comes back for a minute and then it goes away again. I've changed the spark plug, cleaned the carb and it made no difference. I'm thinking the stator could be going bad but id like to find out more before I spend the money on it.
  18. 75 downloads

    Yamaha Moto 4 YFM200DXW Service and Repair Manual
  19. I have 2 1985 Yamaha yfm 200s the yellow bike runs great plug is nice and brown nothing worng with it the black one however runs like a bag of as* it Spitz out the carb it sputters runs real hot it's lean I know that but it literally has the identical carburetor every part of them is identical inside and out and no matter what I down I can't get it to richen out rather burn a whole lot of gas then burn the piston
  20. Bought an old Yamaha (Moto 4 250) and the thing won't start. It will start with choke full on - but close choke and it'll die. If you give it gas - it dies. It will take throttle with choke on (and smoke like a chimney). When I first got it the thing would start periodically - but again soon as you give it throttle it died. I took the carburetor off and cleaned it all with carb cleaner and a tiny piece of wire (to get into the holes) I checked the float levels (good). Has spark. What else could be the issue? I can safely say the carburetor is 100% clean - the pilot mix screw is set where it's supposed to be set (1 3/4 turns). Driving me nuts. I took the air filter off and cleaned and oiled it (would over-oiling the filter choke it from getting air?)
  21. View File Yamaha Moto 4 YFM200DXW Service Manual Yamaha Moto 4 YFM200DXW Service and Repair Manual Submitter Admin Submitted 12/23/2016 Category Yamaha ATV
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