Open primary belt drives offer improved cooling, easier maintenance, and enhanced performance for many motorcycle setups. This guide highlights five reliable options that align with the “open primary belt drive” concept, showing how each product supports open primary configurations, durability, and compatibility across popular models. Read on to compare features and find a solution that fits your needs.
| Product | Brand | Key Feature |
|---|---|---|
| Belt Drives 8MM FL,FX REPL DRIVE BELT Driveline Open 2″ | Belt Drives | 8mm, 3in. Primary Belt, 140T |
| V-Twin 20-0613 – BDL Belt Drive Kit 8mm | V-Twin | BDL Belt Drive Kit 8mm |
| Belt Drives Ltd EV2PH-B17-B 2in. Open Belt Drive Kit – Black | Belt Drives | Two-piece motor plate design, 2in. primary belt |
| Belt Drives Ltd. Replacement Primary Drive Belt BDL-142-2 | Belt Drives | Replacement primary drive belt |
| BDL371443 Primary Drive Belt 8mm x 3″ 144 Tooth | Gaimeila | 8mm x 3″, 144 Tooth, wide compatibility |
Introduction to how open primary belts fit different bikes, what to look for when choosing a kit, and how these options stand up to real-world use. The selections below cover kits, replacements, and upgrades designed for open belt or tin primary configurations, with attention to compatibility, belt width, and mounting hardware.
Belt Drives 8MM FL,FX REPL DRIVE BELT Driveline Open 2″
This belt is designed for open primary applications, featuring an 8mm drive specification and a 3-inch primary belt with 140 teeth. The kit is positioned as a direct replacement for Harley-Davidson style open or tin primaries, supporting easy installation and maintaining drive alignment. Key considerations include ensuring pulley compatibility and confirming the 2-inch belt drive configuration matches your primary housing. The product emphasizes durability and straightforward maintenance for riders seeking a reliable open belt setup.
V-Twin 20-0613 BDL Belt Drive Kit 8mm
The V-Twin kit centers on an 8mm belt drive configuration, marketed as a BDL Belt Drive Kit. It’s intended for open belt primary setups, with emphasis on compatibility and kit completeness. Practical considerations include whether the kit includes mounting hardware and whether the 2-inch or 3-inch belt dimensions suit your primary cover. Riders evaluating upgrades to an open belt system may find this option aligns with mid-range performance needs and straightforward installation.
Belt Drives Ltd EV2PH-B17-B 2in. Open Belt Drive Kit
This open belt drive kit features a two-piece motor plate design and a 2-inch primary belt, aiming to simplify alignment and reduce vibration. The two-piece mounting approach may help with installation clearance on certain frame designs. When evaluating, check your motor plate compatibility, the belt width, and whether the kit includes the necessary spacers or fasteners for a clean, secure fit in an open primary configuration.
Belt Drives Ltd Replacement Primary Drive Belt BDL-142-2
Replacement primary belts are essential for maintaining open belt drive performance. This Belt Drives Ltd option presents a straightforward belt replacement for existing open primaries, reinforcing reliability and reducing downtime. Prospective buyers should verify belt length, tooth count, and compatibility with their specific primary drive kit or housing to ensure proper fit and longevity.
BDL371443 Primary Drive Belt 8mm x 3″ 144 Tooth
Gaimeila-branded BDL371443 belt matches an 8mm width and a 3-inch length with 144 teeth, designed for broad compatibility with open primary drivetrains. It’s positioned to address wear and material fatigue on original belts, offering a replacement that supports reliable power transfer. Consumers should confirm compatibility with their rear pulley tooth count and ensure adjustments do not compromise belt tension or alignment during operation.
Buying Guide: Key Purchase Considerations
When selecting an open primary belt drive, consider the following factors to ensure you get a configuration that fits your motorcycle, riding style, and maintenance preferences.
- Compatibility: Verify pulley tooth counts, belt width, and overall spacing against your frame and primary cover. Some belts are designed for specific OEM setups and may require adapters or different motor plates.
- Belt Type and Width: Common widths include 8mm belts. Ensure the belt width aligns with the pulleys and provides adequate load capacity for your horsepower and torque.
- Drive Kit Completeness: Some listings are full kits with motor plates, spacers, and hardware, while others are belts alone. Determine what your installation requires to avoid missing parts.
- Maintenance Access: Open primary designs can simplify inspection and cooling. Consider how the setup impacts routine maintenance and cleaning intervals.
- Material Durability: Look for belts with reinforced cords and heat-resistant compounds suitable for high-load, sustained operation. Replacements should be readily available.
- Brand and Support: Reputable brands offer clearer compatibility information, warranties, and technical support—valuable for first-time open primary users.
- Installation Ease: Some kits feature two-piece motor plates or quick-release components. If you’re not an experienced technician, choose options with documented installation guidance.
- Heat and Vibration Considerations: Open primary systems may experience different vibration profiles; ensure mounting hardware and belt tensioning are designed to handle these conditions.
Different riders prioritize factors such as upgrade potential, ease of sourcing replacement belts, and the balance between performance and maintenance. The selections above provide a cross-section of options—from replacement belts to complete drive kits—allowing riders to tailor open primary setups to their bikes and riding philosophies.