ive been working on tuning a new to me r also my first two stroke
i bought it running but with no power got a decent deal on it
bike starts first kick and runs great up to where the powerband should hit and it falls on its face
i put a fresh top end (new piston and a hone it is one over) in it and inspected the crank and rod when i was in there everything looks good and tight
reeds are good
i did a leak down test no leaks
standard compresson piston, bored one over boysten reeds, fmf gold series dg scilencer uni air filter with lid on no holes im on long island at 12' above sea level
it has a 142 main jet in it
i got a few main jets and started going up first it just got worse
dropped down and it got better i have a 130 in it now and it makes a bunch of power hits the powerband still breaks up sometimes but a lot better
im concerned that it is too lean and im scared to do a plug chop at full throttle for that long i did a short(maybe 1 seconds) full throttle plug chop ill attach a picture
is there possibly something else going on here other then jetting