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View Full Version : Does any one know the compression of stock 86 250r in psi. Please help



wwclea01
03-19-2004, 07:28 PM
Ok I just got finished rebuilding bike, and have rode about 3 times. Hes seems to have lost some compression. I can move the kick start down by hand, I could do that when I just finished the rebuild. I am wanting know the compression it is supposed to have. I know that it is 7.5 to 1.

powerslider
03-19-2004, 09:15 PM
150psi minimum with a good compression gauge (Snap-on) My 88 stock was 170.....

250rpilot
03-20-2004, 09:29 AM
yeah 150 minimum. a fresh bore on mine is usually around 160-165.