i had similar problem and i took apart the carb's and cleaned them out. jets also cleaned. put everything back together and the shee ran like a charm.. try the same and see what happens. doesnt hurt to try it out.
I went riding today and all of the sudden while under half throttle the shee seemed to lose alot of power.. I noticed the rubber gasket between the motor and exhaust pipe has broken and there was a leak.. I replaced the rubber gasket but still no power.. I noticed that when i put my hand up to the pipes the left cylinder didnt have nearly the exhaust pulse as the right cylinder..
What could b wrong????
mods are
wiseco top end
v force 3 reeds
toomey t5
jetted
k&n filter
thanks