im running a cr head gasket and i was wondering how mych i could mill my head and still rin pump gas! does anyone know? need anymore info let me know!

 

None.

That's why you run the CR head gasket. The head gasket is about 40 thousandths thinner, so in effect it's the same as decking the head 40 thou. Past the CR head gasket you need to start looking at reconfiguring the squish band and pocket shape. Even with higher octane gas the benefits of decking more off the head without re-cutting the squish and optimizing the pocket shape are null.

 

It sounds like you are talking about rechambering the head, Backcountry. This is usually most effective in conjuction with porting. Am I correct?

 

Any two stroke engine when the configuation is altered any will often respond favorably to a differnt squish band and combustion pocket shape, even as simple as an aftermarket pipe. The stock head is woefully sloppy(squish clearance too large) and the pocket shape is not optimized(re-chambereing) for most applications. A head can be re-cut whenever, it's just usually done to compliment the porting alterations, or the porting alterations require a differnt configuration to function properly(prevent detonation, etc.)

 

i know all this i was just wondering how much i could do it untill i get my esr head! i have a mill and can do it in like 10 min and wanted to get the most compression i could w/o race gas for a temp fix!