Jump in and correct me if I'm wrong but the engine on anything no matter how it is mounted is rotating mass that acts like an internal gyroscope, the faster it spins the more resistant it is to change direction.

Lets say I'm cruising down a big hill at about 65mph with the engine turning 7,000rpms, when I try to turn the bike from side to side it feels pretty heavy and take some effort. When I pull in the clutch and just coast with the engine idleing at 1,200 rpms it is a lot easier to turn because the only rotating mass I'm trying to fight is whatever is attatched to the axles.

I think, but I'm not sure, that the same concept applys to to cars.

Busa, what are you going to school for?