45t rear sprocket.

[bigjay]

Std K8 Busa with RS3 yoshi cans, lowered, stock length, but exta link with 45T r/spk, reverse pattern gearchange + quickshifter, + TRE and PC3. Dynoed at 175 rwhp @ 105 Ft/ibs torque on our dynojet dyno.
With 45T best 60ft 1.66 and 6.49/115.15 mph at 660ft. 43T= 1.65/60ft 6.31/118.64 and 42T= 1.59/60ft 6.23/117.89. Obviously some of the improvement is getting used to riding again [we dont actually have a dragstrip in SA] cheers Jim

I'm not surprised that going to a 42 rear made the bike quicker. I was told to do that on more than 1 occasion and also from a KNOWN racer in the states too.....