The 18 sprag clutch will only work with a new engine sprocket 06-4681 and Gear Crank 06-4731. It will not work with the old 14 sprag mating parts.
OEM: 06-4733, 69-0617
NB. Backfire during start-up will quickly destroy the sprag clutch part 06-4733.
To avoid this situation, ensure that: