Plug chop method. Heat engine (3mile trail to riding area), swap to brand new plug, run wot through gears, hold 5th for ~8sec, pull clutch and kill engine, old plug back in.
Engine: Stock bore, Vito's reeds, FMF Fatty/Powercore 2, No airbox lid, outerwears prefilter. 40:1 with Lucas and 91 no ethanol.
450ft altitude. ~80°
First run I had 280 main, middle clip, 2.5turns out. felt good, no stutter, reached 55mph, plug was pure white with no ring.
Started over, 300main, went back to 2nd clip down, 2.5 turns out, felt good, had an occasional hiccup(cleared up with throttle blip)
Reached 56mph but still pure white again.
Tried in yard with 320 and seemed good, but before going for another test I figured I'd ask. I also have 340 and 360.
Engine: Stock bore, Vito's reeds, FMF Fatty/Powercore 2, No airbox lid, outerwears prefilter. 40:1 with Lucas and 91 no ethanol.
450ft altitude. ~80°
First run I had 280 main, middle clip, 2.5turns out. felt good, no stutter, reached 55mph, plug was pure white with no ring.
Started over, 300main, went back to 2nd clip down, 2.5 turns out, felt good, had an occasional hiccup(cleared up with throttle blip)
Reached 56mph but still pure white again.
Tried in yard with 320 and seemed good, but before going for another test I figured I'd ask. I also have 340 and 360.