two stroker

I know exhaust timing and blowdown plays an important role with compression. that might be the compression limiting factor with the banshees. In my experence compression always bumps up useable power to a certian point, then you start loosing power from too much comp. Whats the all around happy medium comp # for a banshee?

I guess that my saw "skills" dont apply to well with atv 2 strokers LOL. I would have got some 17 cc domes to fit and run pump gas but that dont sound like a good idea after researching this forum.

kinda confused about the banshee compression. I usta build race chainsaws that were 2100 husqvarnas. 99 cc engine running about 6 degrees of advanced timing and 190 psi compression on pump gas with very aggressive chains that load up the engine pertty good. never had an issue with detonaton or overheating and that was with a air cooled engine. Now why cant we run higher comp numbers with the banshee on pump gas? oh and the rpm of the saws was 12,500 rpm

Been doing some research and discovered that cpi's need smaller jetting than toomeys and others. Is this jetting size that is being refered to a "smaller" near stock jetting fuel rate?. I will be getten a newer stock banshee and want to start with pipes first then build the top end slightily later down the road as long as that green paper stays trickling in LOL. Elevation were Im at is 2100 ft but majority of riding will be at 2800 to 4500'. lots of trails and some field riding. gearing will be 12 tooth on the front and 43 rear. Thanks guys and gals for any help. ohh and great forum here