I've a '90 engine, and was wondering if his head mod is applicable or not. Jeff Fredette says not to as his requires race fuel - I want to stay with premium pump. Ron (RB) hasn't answered my two e-mail messages, therefore I assume he must be busy or out of the area.
I think Wibby has it on his 92. Living down around sea level like you do I don't know that i'd worry too much about getting it done, seems to be a common mod though for the people who ride at elevation.