Thanks for all the tips, but quick question… Are we talking about the same engine??? Super Shifter 175cc??? My engine, the IAME Super Shifter 175cc, came with the HB-15A Tillotson carburetor, you wrote that your carburetor is the HB-10A 
and if I’m not mistaken, the Tillotson HB-10A is the carburetor that comes with the X30 Super 175cc, which is not the Super Shifter, it’s an automatic engine, and the squish on this engine, according to the IAME manual, is 0.95
So based on what you have mentioned, HB-10A, squish 0.9-0.95 I have a feeling that we are talking about two different engines 