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Found 10 results

  1. 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
  2. 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
  3. 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?
  4. 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.
  5. 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.
  6. 61 downloads

    Yamaha Moto 4 YFM200DXW Service and Repair Manual
  7. 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 ass 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
  8. 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?)
  9. 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
  10. 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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