These pictures are from a 2003 Buell® XB9R which was converted into a race bike for CCS/ASRA. In 2004, we installed a Nallin 1169cc conversion kit with oversized valves & a port job. The compression ratio is 13.1:1 and was running with a Zipper’s 585 cam. We had an oiling problem the first season which damaged the cams, pistons, valves and guides. At that point, Nallin was unable to provide us the same pistons, and when re-working the heads installed the wrong size valves and seats. Our machinist had to make pistons to work with the heads. No problem.

After getting it running again for the 2006 racing season, a valve seat fell out of the head after a few dyno pulls while we were tuning the fuel injection. Loss of compression soon followed. This damaged both cylinders, heads & pistons.

Starting from scratch once again, we got a set of stock heads with stock valves, and with minor porting got higher flow numbers and a better curve that the Nallin heads with oversized valves (edit: different flow bench and operator.) We are currently waiting for the cylinders to be repaired or replaced. Hopefully we’ll be running in May 2006 for Autobahn.