I have a new Raptor 350 that has around 5-8 hrs on it. It has had a high speed miss, and also has a mis when in netural and giving it a little gas. I can feel it pop and it seems to be poping in the intake, like it is backfiring through the intake. It also has a metal knocking sound in the engine when it pops. Ie. backfires. I cheked the Valves, thinking one may be loose but they seemed to be within tolerances. Any Ideas? or should I pack it up and let the dealer look at it?

Thanks,
Mark

 

Sounds like your jetting to me.

 

Would the jets need adjusing being it is new and completly stock. The jets should have been set at the factory, or should the dealer have checked that out prior to my taking delivery?

Mark