How many compression rings in marine engines normally have?

1995 Rm250 with new piston and rings has low compression.?

  • I just picked up a 1995 Rm250 off a buddy who I know did the piston and rings and didn't even ride the bike before I bought it. The bike runs great, has tons of power, starts up within 3 kicks, doesn't smoke much but has low compression. I can't kick it with my hand but it is pretty easy to kick over with shoes on. My buddies rmz250 4 stroke with compression release valves is harder to kick. What could this mean if the bike has low compression with a new top end?

  • Answer:

    Jamie, Do a compression test with an actual compression gauge. Your feel test may be [is] inaccurate.

Jamie at Yahoo! Answers Visit the source

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Other answers

a 2 stroke only runs at about 9-10:1 compression while the newer 4 strokes run at 12-13:1 compression

Most of the time this is due to problems with the valves sealing, unless somehow the ring job was botched.

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