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View Full Version : compression test for viper 70


vindell
04-12-2009, 04:15 AM
what is acceptable copression, pulled 80lbs with throttle wide open.
TeamNeilson
04-12-2009, 04:33 PM
under 90 and you consider rings and check the cylinder walls for deep scratches.
vindell
04-24-2009, 07:33 PM
checked compression a week ago around 70, had a inkling test was unaccurate due to bad tool. re-checked tonight, pulled a little over 100. am i happy. what should a new 70 cc read