compare stock reeds to Boyesen rad valve cages
SkiDoo XP800R trail mod Boyesen Rad Valve test
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2011 Polaris ProR 800 Pipe Shootout, and cheap engine mods
Compare stock to Aaen, BMP, DynoPort, SLP then raise cylinders with a shim kit and hang on!
March schedule, update
2/25-3/2 reengineering, updating dyno drive system. The big dyno starter drive is mounted to the high speed dyno drive shaft used by 99.99% of the engines we tune. From experience I know that the "blower" (Gates PowerGrip toothed) belt drive...