just tried a 200 main jet banshee pulls better still shut down right jug but at slightly higher rpm did a 10 min ride left plug was wet and black right plug was a light brown and wet! so my game plan is im building a leak down tester,i ordered a cool head o ring kit im going to change all the head o ring, and i will buy some yamabond and coat every gasket in the intake and then ill try some more jetting, i really got a feeling that at some rpm range the right cylinder his pumping some air ! but at full throttle they both scream fine