An aftermarket or custom transmission unit, a 6 Speed RSD (Right Side Drive) Chrome Transmission Assembly is primarily utilized in wide tire applications or custom chopper designs. When wide rear tires are used, its right side drive design ensures the best drivetrain balance, and the chrome finish adds a high level of visual appeal.

Key Features

6-Speed Gearbox

• Provides smooth, progressive shifting

• Lower first gear for easier take-off

• Overdrive sixth gear reduces RPM at highway speeds, improving fuel efficiency and reducing vibration

Right Side Drive (RSD)

• Moves the final drive (belt or chain) to the right side of the motorcycle

• Ideal for wide rear tires (240mm, 250mm, 300mm+) to maintain centerline balance and prevent offset drivetrain geometry

Chrome Finish

• Durable show-quality chrome plating

• Matches other chrome components for a unified custom appearance

• Requires care to avoid pitting or peeling over time

Heavy-Duty Construction

• CNC machined billet aluminum or forged casings (depending on manufacturer)

• Hardened gears and shafts for reliability under high torque

• Often uses precision sealed bearings for smooth operation

Compatibility

• Typically built for custom chopper frames or Harley-Davidson Softail-type frames modified for RSD

• Uses standard Harley clutch components (in most brands)

• May require custom primary and secondary drive alignment setups

Assembly Components Include

• Complete assembled transmission case

• Gears (1st to 6th), shift drum, shift forks

• Mainshaft and countershaft

• Chrome end cover and top cover

• Bearings and seals pre-installed

• Some models include a hydraulic or mechanical clutch actuator

Advantages of RSD vs. LSD (Left Side Drive)

Balanced Look & Performance – Chain or belt aligns with rear tire center
Better handling feel on wide tire customs due to drivetrain symmetry
Preferred in high-end custom builds for aesthetics and engineering

Installation Notes

 Must ensure frame compatibility with RSD setups
May require custom rear wheel hubs or sprocket/brake assemblies designed for RSD
Professional installation recommended due to drivetrain alignment precision

Common Applications

• Custom choppers with 250mm to 330mm rear tires

• Show bikes requiring full chrome drivetrain aesthetic

• Builders seeking optimal drivetrain geometry on wide-tire setups