DS3603-0013, PRIMARY CHAIN OIL, 84-UP, Quart Order Here
Specially designed to use with the type of clutch used in sealed primaries on the 84-up Big Twins. (not for XL). So many riders do not change their transmission and primary oils on a regular schedule. You must change these oils after the first 1000 miles and at least every 10,000 miles after that. The transmission and primary oils collect gear and chain particles and can ruin gears and bearings if not serviced regularly.