I need help! I have searched & searched with no luck.
We were out with my 07 raptor over the weekend, and it ran solid the whole time. Then I was going to move the bike closer to our toy hauler to lock it up for the night, and it wouldn't start. I kept cranking it, and after about 20-30 seconds, it fired up, and revved like crazy to a super high idle. It wasn't bouncing off the rev limiter, but it was really, really high. While it was running, it was making a loud noise, as if the exhaust gasket had blown out or something (hard to describe the sound). Kind of like a super loud whistle. So I turned the bike off immediately.
Everything looks normal from the outside of the engine, nothing appears broken or loose. Within the last few months, I have adjusted the TPS to within spec, changed the spark plug, cleaned & oiled the air filter, and the engine oil has always been changed after long rides. The valves were last adjusted about a year ago.
I can't think of what could possibly be the problem!?!?!?! Could the valves have suddenly gone waaaay out of spec??
Has anyone seen or heard of this?
Thanks for your help!!
The only mod to the bike is a pro design intake.