Just letting ya'll know. I've got the Powroll 61mm piston ready to go in next week (160cc). RRR Cycles is going to get the valves done at the same time (seat angles and cut off some of the extra material around the stem). The cases need to be split to pull out the balancer and maybe some light machining. I've already got just over 12hp at the rear wheel. Can't wait to see the end result - I'm aiming for 110% increase over stock hp. By the way, I'll be selling the BBR cylinder, piston, and cam on ebay once they're out.