I meant to say thanks!
I don't know the carb mm to jetting ratio but everyone with a 19-21mm carb (and huge exhausts) seem to run in the 90s.
60 is my starter/coke jet, the idle/pilot jet is 50.. anyways the low end is fine and fully tunable... my mix screw is on the lean side and it's still rich enough.
I usually tune so it 4-strokes when warming up and as the engine gets hot, starts running normally.
I just put the W7 needle on the richest setting and it 4-strokes at the needle now too, and at the main jet when warming up. So I think I've got the right needle, since I could get it to 4-stroke it seems tunable enough.
When it warms up and breaks from the 4-stroking if I hold at WOT it feels really lean, sounds weird and sometimes it cuts out in a way that makes me REALLY nervous--- like a soft seize or as if I just just pulled the choke. could that be from a fouled plug? My plugs are very dark.
to compound things, my left-side pedal just SNAPPED right off, so I gotta find a replacement with metric threads, ugh.