Spoiler AMA California Speedway 21 Mar 09

[z06boy]

Originally Posted by Rsv1000R

Comparable liter twins make about the same hp as a 600 I4, it's a matter of valve area. The twin will make more torque, but they also get a 20 lb weigh penalty (subject to increases based on performance).

Ok I did notice the weight differences...

Inline 4's 365 lbs.

675 375 lbs.
848 375 lbs. (I think)

Aprilia 385 lbs.
Buell 385 lbs.