raptor 700 prob

[426kidz]

buddy has a 06 raptor 700. just put a hmf slip-on on and now it wont start we have that optimizer and idk what too do with it really it cranks and turns over but wont fire up any help???? ran great with stock pipe??

[Kwadrider04]

How long has did it set before the new pipe being installed. I have an 06 and I have trouble with mine when it sits for several days or week during poor riding weather and after sitting when I try to fire it up it fouls the plug. Try new plug