1st ya need to get the carbs synced, via vacuum gauge.
http://www.denniskirk.com/jsp/produc...d=41804&mmyId=
to make sure they're opening @ the same time.
no you can't just guess.
here's another A/F gauge that works well.
http://store.summitracing.com/partde...5&autoview=sku
the a/f gauges are nice for fine tuning. though EGT, exhaust gas temp, would be better. you can get some multimeters w/ thermocouple plugin and check each cylinders temp.
just goin up a couple jets probably won't solve your issues as the mains only come into play after 1/2 throttle. you probably need to richen your pilots, effect 1/4-1/2 throttle. change or raise your needles. so more fuel comes thru main earlier compared to stock. to get main size right ride along preferably in 5th and run wide open, the just slightly back off throttle. if bike slows down you're close or a lil rich. if bike picks up a lil then you're just a lil lean. come up 1 size jet @ a time.
with a a/f gauge just cruising along should be reading lean. cruising/no load engine runs fine @ 15:1
plug reading is still the best method, run good ngk stock heat range plugs.
these are cv carbs right? not flat/round slides. make sure vacuum diaphragm
is in good shape and slide ride smoothly up and down bore.
cv's are harder to tune than flatslides.
as for pulling airbox cover off, did you change jets then?
cuz it probably was running lean, as said earlier if you back off throttle and it picks up r's, you're lean. 80's bikes were notoriously lean, for emissions
if you're shooting fireballs might wanna check your timing too. i like the fireball via running wide open, hit kill switch for a sec then flip back on.
