2011 assault pushing spark plug out

[k-dawg77]

For some reason my 11 assault is back out the pto spark plug when riding it runs fine at lower rpm but will burble in mid range until I pump the throttle then pull 8100 but for some reason it's backing that plug out

 

[papajake]

replace plugs with new ones but before you do clean the threads and the top of the head with brake clean use a q tip for the threads and wipe off with a rag

 

[CrankShop910]

Is it a turbo or running a high comp head,or pipe??
Sometime detonation makes the plugs to back out.

 

[Bnorth]

Riding partner had this happen to is 2012 assault. Tried cleaning it and new plugs, ended up getting a new head on warranty.

edit: Sounds like a good excuse to put a PA head on.

 

[k-dawg77]

Im running a bikeman fatazz pipe and power commander 5 with a bikeman powder lite can

 

[CrankShop910]

Try running 10% av gas, see if that helps.

 

[k-dawg77]

Try running 10% av gas, see if that helps.

I run a mix of vp 112 an premium but some people say that's what the problem is might be to high of an octane

 

[CamoKVF700]

Why are you mixing race fuel if you haven't changed your compression?

You need to run the lowest octane possible for your engine combo. Run higher than required and your sled will be slower. High octane burns slower than low. It hurts performance if it's not required.

 

[CrankShop910]

Why are you mixing race fuel if you haven't changed your compression?

You need to run the lowest octane possible for your engine combo. Run higher than required and your sled will be slower. High octane burns slower than low. It hurts performance if it's not required.

Some pipes can increase running compression