June 29, 20179 yr Can anyone tell me what compression should be on 07 TXT Pro 300 ? Thanks Jim A Edited June 29, 20179 yr by jimbike64 needed to delete word
June 30, 20179 yr I don't know what the actual compression ratio is on the 300, but imagine it would be around 9:1. Therefore if you used a compression tester screwed into the spark plug hole and kicked the motor over, you would expect to read 14.7 x 9 psi, or approx 130 psi from a healthy top end. Bye, Peter B.
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