Yamaha Moto 4 Weak Spark - I just acquired a 1985 or so yamaha moto 4 200 that won't crank over via the start button. The battery is dead, but i have a fresh battery booster on it. If you have it in neutral,. Replace the spark plug if a spark does not appear, then turn the engine over again. Replace the cdi unit if a spark still does not appear with a new spark plug. Screw the spark plug into the. I just bought a yamaha moto 4, i have sprayed 'start ya barstard' into the carb and on the spark plug and it doesnt even fire! Although when i have the spark plug on the outside. It cranks and is getting fuel. I pulled the plug and cranked it over and no spark. Dealer says he has never seen a bad coild and guided me towards the magneto. If you have a good spark when you pull start it then the stator, pulse, and wires connecting them all are all fine. And the ignition coil is fine. The cdi is fine too unless the 12v. The problem is there is no spark whatsoever. Thanks to another member i got the service manual and went threw the tests this past weekend and i still cannot find anything. Going through some of the wiring checking for bad grounds on the 200yfm yamaha moto 4 mid 80's model. I recently picked up an old 86 moto 4 80cc that i would like to get running and fix up for my grandson. I was told it had no spark which i verified by hooking up a battery and. Look at the kill switch (run/stop) to make sure it isn't bad or broken. Then check wiring for bare spots that may be grounding out. Last part you haven't replaced is the plug.
I just acquired a 1985 or so yamaha moto 4 200 that won't crank over via the start button. The battery is dead, but i have a fresh battery booster on it. If you have it in neutral,. Replace the spark plug if a spark does not appear, then turn the engine over again. Replace the cdi unit if a spark still does not appear with a new spark plug. Screw the spark plug into the. I just bought a yamaha moto 4, i have sprayed 'start ya barstard' into the carb and on the spark plug and it doesnt even fire! Although when i have the spark plug on the outside. It cranks and is getting fuel. I pulled the plug and cranked it over and no spark. Dealer says he has never seen a bad coild and guided me towards the magneto. If you have a good spark when you pull start it then the stator, pulse, and wires connecting them all are all fine. And the ignition coil is fine. The cdi is fine too unless the 12v. The problem is there is no spark whatsoever. Thanks to another member i got the service manual and went threw the tests this past weekend and i still cannot find anything. Going through some of the wiring checking for bad grounds on the 200yfm yamaha moto 4 mid 80's model.