In real world use, rear master cylinders found on a wide variety of H-D models from the late 50s through the early 80s have performed well, but now require regular rebuilding or replacement. GMA, a subsidiary of Belt Drives Limited, manufactures complete direct bolt-on replacement units for both Kelsey Hayes and Wagner style rear master cylinders.
 |
| BDL rear master cylinders |
Designed and manufactured using up-to-date technology and materials, the cylinders are direct bolt- on replacements for the OEM parts, provide superior performance, reliability and longevity and are available in black, polished and raw finishes. They have 5/8” bore, with a 1/8” NPT port that will accept various inverted flare adaptor fittings; rebuild kits available.
Also seen here, these premium quality ‘Black Out’ levers are “as rugged, durable and dependable as they are hi-tech in appearance”. They have a master cylinder with 5/8” bore and threaded ball end plunger. This design is said to provide positive engagement and precise movement of the piston and rubber cup reservoir seal for positive, smooth stopping performance.
 |
| ‘Black Out’ levers |
GMA controls are secured to bars with camlocks, and the switch housing “blends in for an exceptionally clean profile.” An available hydraulic clutch master features a 9/16” bore to match common aftermarket slave cylinders; designed for use with 1” bars and also available with chrome and polished finish.
Finally, these sideways adjustable, custom exhaust compatible, ergonomic “rider friendly” floorboards have a non-skid rubber cushioning insert and unique profile that provides plenty of room and comfort for rider and passenger; a replaceable skid button on the bottom protects the boards in aggressive cornering.
 |
| Vintage style floorboards for early and late Big Twins |
Each board is CNC-machined from a solid block of 6061 billet aluminum and finished in durable high luster chrome or black anodize; the kits are available as a complete set or individual pairs.
BELT DRIVES LTD
www.gmabrakes.com