taco eater :
Rob Rob from San Francisco, CA United States
Bats Approved http://www.bayareatwostroke.com
This is a high RPM pipe with the performance band from 10K to ~14K. The Derbi crank can handle this, however upgrading the bearings would be a good idea.
The pipe comes restricted, and this can be easily removed. Installation is straight forward, for a clean looking upgrade.
Currently we are seeing over 12 HP with this pipe and the modified Airsal kit.
Installation photos and report on Bats: http://www.bayareatwostroke.com/forum/showthread.php?t=3144