Have the Takegawa inner rotor kit and clutch on a 106. Agree with the above about great on the top end, not so much on the low end. At first I kept killing my engine because i was used to all the inertia of the flywheel and clutch hooked directly on the crank in the stock set-up. With the extra weight on the crank, it takes longer to get to max revs, but it also helps at lower speed, because there is more momentum retained in the engine. If you are using a lower cc engine, and tend to always be WOT, you might like the inner rotor. With a more powerful engine, not so much. Some people don't recommend the inner rotor unless you have one of the Daytona or takegawa style clutches. The idea being that if you are taking weight off one side of the crank, you should take it off the other side as well. Don't know if that is true, but seems reasonable to me. There are guys who lighten flywheels (just got a couple done at FPM,) which might be a good compromise for you.