Rear Sprockets


I am thinking about going to a 42 on the rear.  

Does anyone know what the stock rear sprocket is, Alum or Steel?

Sprockets Specialists say use the Steel on the Busa, but I want a 42 Alum, Titan Tough, Black.

Any comments?

Depends on your HP. If you are stock up to about 165hp + - you will be ok with a Alum. However you have to ask yourself, is just OK good enough. Alum. at the very least will bend the teeth forward. Take the advise and stick with steel. have it coated if you do not like the look. Other then that you will change sprockets and chains more often using Alum. The weight is not a factor to worry about.