Originally Posted by DELTATANGO
Valve too tight?
Doesnt sound like, but worth checking
Originally Posted by mjskier
Is the crankcase breather on the rear of the air filter?
If it is, I can see where most of the crap would get sucked in the rear inlet.
No, stock setup, breather into the front & clean throat!
Been searching about it and the closest i've found relates to bad injector, although the engine revs fine.