You could try replacing the exhaust cam with an intake cam. Fastdude, one of our Swedish members, has done it on his bike, he said 76hp.
Steelheart- '03 Speedmaster Black/Yellow
The Hayabusa Killa
16" Shorties/140 mains/Airbox drilled
Procom CDI
"There is no cure for Celibacy. But we can treat the symptoms."