Full-synthetic engine-side service, ready to go. The Bel-Ray Synthetic Engine Oil Change Kit family is pre-bundled per platform so each variation carries exactly the engine fill the bike asks for - no over-bought parts and no half-used jugs on the shelf afterward.

Every kit centers on Bel-Ray V-Twin Synthetic Engine Oil 20W-50, a full-synthetic blend built on a polyalphaolefin (PAO) and synthetic ester base and rated API SN and JASO MA2 for V-twin wet-clutch compatibility. The Sportster XL and Big Twin Evolution/Twin Cam variations ship 4 liters of engine oil; the Milwaukee-Eight variation ships 5 liters to match the M8's larger sump. Every variation includes a HiFloFiltro HF171 racing-style oil filter in Black (HF171BRC) or Chrome (HF171CRC) with a pre-welded 17 mm hex nut and one engine drain-plug O-ring.

Fitment covers 1986-2022 Sportster XL, 1984-1999 Evolution Big Twin, 1999-2017 Twin Cam, 2017-Up M8 Touring, and 2018-Up M8 Softail at all current M8 displacements (107, 114, and 117 cubic inches). This kit intentionally does not service the transmission or primary; for a one-box full service, see the matching 3-hole complete kit family.

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