I got a different new compression tester that has a schrader valve in the tip. With the throttle wide open I'm only building 95 psi.
I've got new head, cylinder, piston, rings and gaskets. Ring gap is well within spec. Head is torqued per the manual. Rings lined up on the pins as they should be.
What else can affect compression? Could an issue with the reeds or intake cause problems?
This thing is kicking my butt so I sure could use some advice. Thanks!