bad compression!

my motor has 120 psi compression with the puch head. have to measure how much it has with the stock one. oh yea and im going lo lower the puch head maby 0.5-1mm and see how much compression rises
 
i got a kit off e-bay and it only has 90psi would be glad for any help/sugestions thanks gotgas?
How many miles (tanks of fuel) have you run that engine? A new, not broken in engine will have lower compression that one that has burned a few gallons of fuel. The piston rings and cylinder will wear into each other which will raise the compression. My advice is always to not jump into modifications or trouble shooting until the engine has some miles on it. Preferably at the least, two to three gallons of fuel. The more the better.
Tom
 
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