H HATE Member Mar 18, 2004 9 0 Jan 5, 2005 #1 Does anyone know about what the compression reading should be for an '05 YZ125 using a standard tester that screws in the spark plug hole? I can't find a value anywhere in the manual. I'm reading about 130-135 psi. Seems kind of low. Thanks.
Does anyone know about what the compression reading should be for an '05 YZ125 using a standard tester that screws in the spark plug hole? I can't find a value anywhere in the manual. I'm reading about 130-135 psi. Seems kind of low. Thanks.
marcusgunby LIFETIME SPONSOR Jan 9, 2000 6,450 2 Jan 6, 2005 #2 You expect about 150-185psi, you need to hold the throttle fully open and kick like mad.
I i_955 Member Dec 18, 2004 265 0 Jan 6, 2005 #3 I just picked up a compression tester and a YZ250. Would the compression be simular for the 250?
darringer LIFETIME SPONSOR Dec 2, 2001 1,029 0 Jan 6, 2005 #5 Should be closer to 200psi or higher for the 250.