It's almost doing the same thing as the raptor. It won't start. It turns over and gets spark but it will not always start. Sometimes it will, but usually not. It just started to do this sicne I drilled holes in my airbox. But anyway, When it does start, I have to keep it running for it to stay started. I tried a new plug, no difference. After it gets warmed up though, it will start right up everytime until it gets cold.

Please help me out here guys I want to get this running really soon.

Later,
Warrior68Man

 

ummm... is gas getting to the carborator alright??? but does it just crank over and over and over but it wont get the engine to start if so cheak your valves that could be it?

 

Just had the problem over the winter and it was very fustrating!! But I did find the problem and fixed it (myself). Yamaha uses universal spark plug boots. These are the kind that you cut 3/8" of the end of the wire and then jam the boot on effectively splicing the wire onto the boot. Although Yamaha offers theier version over the counter at the dealer...don't buy it it won't fix (the boot hits the head).....Buy the one for it OE ONLY from the dealer..it's only 23.00 dollars and it will work as long as the last one. P.S. you only get one shot at a ew boot, they mke the wire from the coil too short to ty more...If yours was aready done, ou'll have to replace the coil under the hool (80.00) and do the gnd wire at the same time (they get rusty)

The reason why you guys are getting mixed results after changing plugs is because your shaking the connection to the plug