Well basicly this is what it's all about;
If you like to have a significant increase of torque and hp in low and mid range, up to 6 500/7 000 rpm - then the 904 is the way to go!
If you like to have a significant increase of hp above 7 000 - go for hi-comp pistons and a tweeked CDI
If you want more in both ends - do both and a proper top job with bigger valves, new or bored out carbs, new cams etc, etc
Hasse
Last edited by Hasse; 10/13/2009 4:26 AM.
