Bel-Ray Semi-Synthetic 3-Hole Complete Oil Change Kit for 1984-Up Harley Davidson Big Twin and Sportster
Keep your Harley performing confidently at every service interval without compromising on protection. Engineered for the practical rider who wants a meaningful performance upgrade over conventional oil on a regular maintenance schedule, this 3-hole kit delivers complete drivetrain coverage — smooth shifting, quieter running, and reliable engine protection mile after mile. Every critical lubrication point is covered so you can focus on the road ahead.
Key Features
- Covers all three drain points for a complete 3-hole service: engine, transmission, and primary chaincase — everything needed in a single purchase
- Synthetic Ester base blended with select synthetic and petroleum components delivers high film strength at a practical price point
- High viscosity index provides stable viscosity protection across a wide operating temperature range
- Improved oxidation resistance helps the oil withstand breakdown between drain intervals
- HiFlofiltro HF171 series oil filter included in black or chrome with a pre-welded hex nut for tool-assisted removal
- O-rings included where required — no additional hardware needed to complete the service
- Sportster kit includes Bel-Ray V-Twin Sport Transmission Fluid — services both the transmission and primary chaincase in a single compartment
Technical Specifications
- Engine Oil: Bel-Ray V-Twin Semi-Synthetic 20W-50
- Engine Oil Base: Synthetic Ester blended with select synthetic and petroleum components
- Engine Oil Rating: API SN / JASO MA2
- Transmission Oil Rating (Big Twin): API GL-5
- Oil Filter: HiFlofiltro HF171 series — Black or Chrome
Kit Contents by Platform
| Kit | Engine Oil | Transmission Oil | Primary Oil | O-Rings |
|---|---|---|---|---|
| Big Twin | ||||
| Evolution / Twin Cam (1984-2017) | 4 Liters | 1L Big Twin 85W-140 | 1 Liter | 3 |
| Milwaukee-Eight (2017-Up) | 5 Liters | 1L Big Twin 85W-140 | 1 Liter | 3 |
| Sportster | ||||
| XL Sportster (1986-2022) | 4 Liters | 1L Sport Transmission Fluid | Not Included | 2 |
Fitment Notes
- A dry fill of the primary chaincase on Twin Cam and M8 drivetrains requires one additional quart of primary chaincase lubricant beyond what is included in the kit
- The Sportster XL transmission and primary chaincase share a single oil compartment — no separate primary oil is required
- Riders with a 2017 model year should confirm their engine generation (Twin Cam or Milwaukee-Eight) before selecting a kit, as both were produced that year
- Please review the Fitment tab for the complete year and model compatibility breakdown
