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Posted by: stuntin andy

thanks for all the info yall... but i dont know how to tell the psin in a pistion and all thta im more of a 4 stroke dude but i wanted to try a 4 stroke the last 2 stroke i had was a blaster and it waz the biggest pos on the face of the earth it was allways broke and how do i know if the jet is perfect?

Posted by: 660r2a400ex

banshee and blaster is nite and day difference, psi is how much compression your motor is putting out, they sell the tool almost anywhere and you just unscrew your spark plug and turn the tool in there, kick it or crank it over a couple times and it will give you a number, the lower compression(psi) the more chances of you rebuilding, the higher the number the better shape the motors in, on the shees, you want over 100 psi 135 psi is like brand new anything over 135 and theres serious motor work done anything lower then 100 psi you need a rebuild