i have been looking around and talking to people. i just purchased my first bike an 05 cbr 600 rr. alot of people who i have talk to do not use the clutch to shift unless its shifting down. whats the reason for this are the transmissions synchronized ( referring to car transmissions) sorry all i really know. i know that clutch-less shifting in my car is terrible and wrecks synchos. why is a bike any different or is it not?