I'm taking off the FMF Apex muffler and putting the stock furnace back on to see if there is a difference...who knows - stranger things have happened...maybe a lack of back pressure is creating a lean mixture and fouling things once it runs for a bit.
KTM 1190 ADV, KTM 530 EXC
Gone: Ducati 999R, KTM 530EXC, KTM 990ADV-R, KTM 950ADV, KTM 690, KTM 640ADV, kTM RC8R, Ducati 996S, Yamaha R1
And how can this be? For he is the Kwisatz Haderach!