rathrockmo
Member
- Aug 23, 2003
- 1
- 0
I have a 1999 KTM 250EXC with a FMF Knarly pipe but stock spark arrester and it drips/blows thick black oil all over the end of the pipe, swingarm, rim etc. after no more than 30 minutes of riding. I believe I'm jetted correctly as I the plug looks great when checking the jetting. A friend says all KTM 250's do this but I find this hard to believe. I,ve changed the silencer packing with no change. I'm ready to do the top end but thought I'd see if anyone had dealt with this themselves.