also. if ya want to rev the thing like a motorbike your gonna have to spend som decent dollars up staris to do that. not to mension the oiling system.
cubes and 8k would be the most cost efective. and most of the 2.8 engines in japan stop making power at around 8.5k. evan with 3240's etc etc.
id say the tomie kit is better. just in finish and build quality