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Old 04-01-2017, 06:16 AM   #20
Frank Miller
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Join Date: May 2010
Location: Auburn, MA
Posts: 2,106
Default Re: No. 7 Cyl never gives evidence of a power stroke on '46 Flathead

A friend's Harley stopped firing on one cylinder riding to NY. After much fiddling around we noticed the intake pushrod lock nut came loose not letting the valve open. That seems to be the logical place to look. I am not sure how a compression tester would work but if you hold your finger over the spark plug hole while cranking you will fell a difference from a healthy cylinder. If you can determine the crank is in a position where the #7 intake is open or should be, blowing air into the cylinder should let you hear it coming through the carb.
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