LATE O.H.V SINGLES VALVE SPRING SEAT
Part No
20179
LATE O.H.V SINGLES VALVE SPRING SEAT
THE LATER SMALLER NORTON O.H.V SINGLE VALVE SPRING SEAT 1 3/16" (30MM) OUTSIDE DIAMETER. 5/8" (16.1MM) BORE USED WITH THE SMALLER VALVE SPRING, FOUND 1959 ON.
SEE A3/148 FOR THE EARLIER LARGER SPRING SEAT.
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