BELT DRIVE AND CLUTCH FOR TRIUMPH UNIT 650 C.C. T120 TR6

Harley Belt Drive Primary | A belt drive and clutch setup for the Triumph Unit 650cc models such as the T120 Bonneville and TR6 is a popular upgrade over the traditional primary chain drive. It provides improved reliability, smoother operation, and reduced maintenance for classic Triumph motorcycles.

Key Features | Buy Harley Belt Drive Primary Online

1. Compatibility:
   • Designed for Triumph Unit 650cc motorcycles, which include models like the T120 Bonneville and TR6.
   • Fits models typically manufactured between 1963 and 1972, which use the unit construction engine where the engine and transmission share a common housing.
2. Advantages of Belt Drive over Chain Drive:
   • Reduced Maintenance: Belt drives do not require regular lubrication or adjustment, unlike primary chains.
   • Quieter Operation: Belt drives provide smoother and quieter operation, reducing the noise and vibration often associated with chain drives.
   • Less Wear and Tear: Belts are less prone to stretching and do not wear out sprockets like chains do.
3. Clutch Integration:
   • The kit usually includes a high-performance clutch that is designed to work with the belt drive system.
   • The clutch typically features modern friction materials and stronger springs, providing improved engagement and durability.
   • Upgraded clutch baskets may be included, offering better alignment and performance compared to stock components.
4. Belt Size and Construction:
   • The belt is usually made from high-strength composite materials, such as Kevlar-reinforced rubber, to ensure durability and resistance to wear.
   • It may come in various widths, commonly around 1.5 inches, providing sufficient strength for the power output of a 650cc engine.
5. Open or Enclosed Primary Options:
   • The belt drive can be used in an open primary configuration, which is popular for custom builds, allowing better cooling and easier maintenance.
   • For a more classic look, it can be run with the stock primary cover, though some modifications may be required for clearance.

Installation Considerations:

1. Primary Cover Modifications:
   • If using an enclosed primary, ensure there is adequate clearance for the belt. Shimming or trimming may be necessary to fit the belt properly.
2. Alignment:
   • Proper alignment of the front pulley, clutch basket, and belt is crucial to ensure smooth operation and prevent premature wear.
3. Clutch Adjustment:
   • Make sure the clutch is properly adjusted after installation, as the new clutch components may have different tolerances than the stock parts.
4. Ventilation for Open Primary:
   • When running an open primary, be aware that while it improves cooling, it also exposes the belt to dirt and debris, requiring periodic inspection.

Benefits:

• Enhanced Performance: Upgrading to a belt drive and modern clutch provides smoother power delivery and more reliable clutch engagement.
• Reduced Vibration: Helps to dampen engine vibration, improving ride comfort.
• Classic Aesthetic with Modern Functionality: The belt drive can add a custom touch while retaining a vintage appearance.

This upgrade is ideal for those looking to modernize their classic Triumph without sacrificing the bike’s iconic character.

• Complete 30mm Belt Drive And Clutch
• Fits Triumph Unit 650 C.C. T120 And TR6 Motorcycles
• 6-Spring Pressure Plate And Hardware
• Gates HTD 800/8M Length 25mm Belt

Bob Newby Racing produces the highest-quality, no-hassle belt drive and clutch available for vintage British motorcycles. This kit includes everything you need to replace your stock primary drive and clutch. The front engine pulley is one-piece, hard-anodized aluminum and fits right onto your stock crankshaft splines. The hard-anodized aluminum clutch basket features enclosed bearings, no hassles with installing loose ball bearings, it slips right onto your transmission mainshaft the same as a stock clutch hub center.

New steel and fiber clutch plates are included, as is a 6-spring pressure plate and hardware, and a Gates HTD 800/8M length 25mm belt capable of handling much more power than stock and able to be adjusted with more finesse. No more adjusting a primary chain, checking your chaincase oil or trying to fix primary drips with the Gates HTD Belt and your new dry primary.

Here at Lowbrow Customs we are big fans of the Newby Belt Drive. They are race-proven on three land speed motorcycles here at the shop, with a total of six world land speed records having been set at various SCTA events including Bonneville Speed Week and Bonneville World Finals. All of the power driven to the rear wheel runs through the Bob Newby Belt Drive, and we have never had a single issue with the clutch nor ever broken a belt!