86 250r compression?

[harrisonmichaelm]

just got an 88 250r with an 86 motor the compression was about 100psi so i tore
it down and rebuilt the top end now it is at 130psi with 18cc cool head but it seams to be running good any advice

[bushwesl]

Is your gauge trustworthy? 130 psi with an 18cc dome is ridiculously low. With a fresh rebuild you should be around 175 psi with a standard head/dome. An 18cc dome is typically a race gas dome, which should give you around 200 psi. Like I said, make sure your gauge is giving you accurate readings.

[harrisonmichaelm]

i will check it with another gauge thank you
at what comp do you need to run race gas

[fulltiltrider]

about 185-190