Harley J question

[Jerry Wieland]

What is the standard bore on a J cylinder - 61 cubic inch?

Thanks Jerry

[23JDCA 808]

3 5/16 inches; from inside the front of the reprinted Spare Parts booklet. Probably increased a bit going from 1922 thru 1928.

[Jerry Wieland]

Thanks Bill:

Somehow I was thinking it was different from the later 61 OHV's.

Jerry