F f15ejedi Well-known member Dec 10, 2009 #1 What should the compression be for the 900? I couldn't find it in the manual.
B BB454 Free Member Dec 11, 2009 #2 Depends on several things, elevation, gauge, hot or cold motor, etc. Old rule is no more than 10% differenct between each cylinder. Also a 2 stroke will not run with compression below 90 PSI. I would think average would be in the 135+ range.
Depends on several things, elevation, gauge, hot or cold motor, etc. Old rule is no more than 10% differenct between each cylinder. Also a 2 stroke will not run with compression below 90 PSI. I would think average would be in the 135+ range.
B BIGGDAWG Well-known member Dec 11, 2009 #3 on our 900's after we had done pistons on a stock motor at sea level we had 145-150 psi
F f15ejedi Well-known member Dec 11, 2009 #4 Cool thanks, I'm just above 145 on both and I'm at sea level.
