Since you have a still have a clutch on the crank, The inner rotor will be more beneficial. You need some weight on the crankshaft for flywheel effect or you'll find yourself over the bars going off jumps. If you can afford it, go with the inner rotor and you'll feel much better acceleration out of turns. Top end power will be the same as before. If you ever go to the Takegawa 5 disk clutch though, you'll want to go back to the stock setup on the ignition. The inner rotor and takegawa clutch creates a bike that is very hard to ride in moto applications. For motard though, the IR and 5 disk clutch are the way to go. BUT, a lightned flywheel will still give a noticeable increase in the torque curve whatever the rest of your engine mods and application. Don't expect too much though as only about 2.5 to 3 oz. of material are removed from the stock flywheel whereas the IR weighs less than a pound.