You mean to tell me that know one knows the compression of a .040 over Banshee with 20cc domes maybe I should have bought a Honda. Just kidding.

ttfn
Dale

 

If you can find or order (free) a RockyMountainATV catalog, they list all the compression for each dome on a stock bore Banshee. (www.rockymoutainatv.com) I have stock bore with 21cc domes at around 800ft elevation with 150-151 PSI each side.

 

Why don't you just do a compression test? Much easier that way.