try this here.. exhaust related but not perfm

[specialized7]

yea, how gummed up is it?
take picsof the inside.
and i belive that cone shapped screen thing is a spark arrestor

 

[liljatownboy]

i had that problem to i thought it was part of my piston when it blew up but i guess it was that

 

[blasterrider119]

pics plz i want to see this

 

[4cfed]

thread in engine section