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An open primary belt drive is a vehicle-specific conversion, not a universal Harley part. Match the kit to the engine, transmission, starter arrangement, control position and model years before ordering. An exposed belt and clutch also add pinch-point and debris hazards, so retain every supplied guard and follow the kit maker’s installation instructions.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | BDL 2 Inch Open Belt Drive Kit TC2PS-2-B | $3,400 to $3,700 | Amazon · eBay |
| 2 | BDL 2 Inch Open Primary Kit EVO-8S-2B | $2,700 to $3,500 | Amazon |
| 3 | BDL 2 Inch Open Primary Kit EV-725B | $3,100 to $3,500 | Amazon |
| 4 | BDL 3 Inch Shorty Open Belt Drive SHS-630 | $1,900 to $2,100 | Amazon |
| 5 | BDL 8mm 1 1/2 Inch Primary Belt Drive 62-40SK-3 | $600 to $700 | Amazon |
| 6 | Primo Brute IV Open Belt Drive Kit | $1,900 to $3,100 | Amazon |
| 7 | Exile Cycles PBK-5 3 Inch Open Primary Belt Drive | $2,200 to $2,500 | Amazon |
| 8 | Exile Cycles PBK-6 3 Inch Open Primary Belt Drive | $2,200 to $2,500 | Amazon |
| 9 | Exile Cycles PBK-M 2 Inch Open Primary Belt Drive | $2,200 to $2,500 | Amazon |
The picks, in detail
BDL 2 Inch Open Belt Drive Kit TC2PS-2-B
A 2-inch BDL open primary for listed 2006-2017 Dyna and 2007-2017 Softail applications with forward controls.
- 2-inch primary belt
- 52/69 pulley combination
- Ball-bearing lock-up clutch
- Published vehicle-specific fitment
- Includes a belt guard
- Forward-controls fitment only
- Exposed-drive conversion requires careful installation
BDL 2 Inch Open Primary Kit EVO-8S-2B
A BDL 2-inch open-primary kit for 2006-2017 Softail and Dyna applications, with a 142-tooth belt, starter housing and guards listed by the retailer.
- 2-inch 142-tooth belt
- 69-tooth rear pulley
- Starter housing and guard
- Kit contents are clearly listed
- Ball-bearing lock-up clutch
- Confirm the exact controls and transmission
- Availability varies
BDL 2 Inch Open Primary Kit EV-725B
A 2-inch BDL kit for 2007-2017 Harley Softail models, supplied with a seven-Kevlar-fiber and seven-steel ball-bearing clutch assembly.
- 2-inch proprietary belt
- Ball-bearing clutch
- Top belt guard
- Designed for a defined Softail generation
- Guard is included
- Not a Dyna kit
- Confirm current stock and exact application
BDL 3 Inch Shorty Open Belt Drive SHS-630
A 3-inch BDL Shorty kit for 1970-1978 Harley Shovelhead Big Twins with electric start; it is designed to use a 1989-2006-style starter that is not included.
- 3-inch 141-tooth belt
- 72/47 pulley combination
- Clutch plates and pressure plate
- Specific early Big Twin fitment
- Electric-start components are identified
- Starter is not included
- Not for rotary-top transmissions
BDL 8mm 1 1/2 Inch Primary Belt Drive 62-40SK-3
A 1 1/2-inch BDL primary belt-drive kit for kickstart-only 1971-1978 Harley FX models including the Super Glide and 1977-1978 Low Rider.
- 8mm 1 1/2-inch belt
- Kickstart-only application
- 1971-1978 FX fitment
- Narrowly defined fitment
- Current retail listing
- No electric-starter provision
- Not an open-drive solution for later models
Primo Brute IV Open Belt Drive Kit
A Primo open primary family whose complete kits include a heavy-duty aluminum motor plate, belt guard and bearing support; kickstart-only versions omit starter housing parts.
- Open belt drive
- Motor plate
- Bearing support
- Starter support is explicitly differentiated
- Guard included on complete kits
- Choose the exact application code
- Kickstart-only kits need different planning
Exile Cycles PBK-5 3 Inch Open Primary Belt Drive
An Exile kit for five-speed Harley Twin Cam Softails using a 3-inch Primo belt, complete clutch, starter support plate and side guard.
- 3-inch Primo belt
- Complete clutch
- Bearing and starter support plate
- Starter support is part of the kit
- Side guard supplied
- Five-speed Twin Cam Softail application only
- Custom-build price level
Exile Cycles PBK-6 3 Inch Open Primary Belt Drive
An Exile 3-inch kit for six-speed Harley Softails and Dynas with a complete clutch, pulley cover, bearing and starter support plate.
- 3-inch Primo belt
- Complete clutch
- Starter support plate
- Defined six-speed application
- Includes guard and hardware
- Requires exact Softail or Dyna confirmation
- Not interchangeable with five-speed kits
Exile Cycles PBK-M 2 Inch Open Primary Belt Drive
A 2-inch Exile kit for six-speed Dynas with mid-controls and six-speed Twin Cam Softails with mid-controls; it retains the stock shift-shaft location.
- 2-inch Primo belt
- Complete clutch
- Stock-position shift-shaft bushing
- Made for mid-controls
- Includes starter support and side guard
- Limited to the listed six-speed applications
- Confirm engine and control layout before purchase
Buying tips
- Do not treat belt width, finish or a pulley cover as a different kit. Start with the transmission, starter and foot-control layout, then use the maker’s exact application list.
- An open belt drive leaves moving parts accessible. Use the supplied guards, keep hands and loose clothing away from the drive, and have a qualified Harley technician confirm alignment and starter support.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.