At about one third the weight of stock units, these lightweight transmission pulleys from Californian manufacturer Belt Drives Ltd (BDL) weigh in at a mere 2 ¼ lbs, according to the company.
The high-tech pulleys are precision-machined to aircraft tolerance from rugged 7075 aluminum, making them suitable for high-performance applications as well as stock replacements. The significant weight saving reclaims horsepower while lightening the load on associated bearings.
A durable, hard anodized finish is said to ensure durability. Currently available for 4-speed Big Twins from 1979 to 1983, 5-speed 1986 to present and 5-speed Sportsters from 1992 up.
Also seen here, BDL’s new CC-140-BB Competitor clutch conversion is a 140-tooth version of their popular Big Twin Competitor clutch series - engineered specifically for stock 1991 and later Sportster clutch baskets.
BDL’s patented Ball Bearing Lock-up Clutch is said to "significantly lighten pull at the lever while providing smooth, slip-free lock-up". Each unit incorporates a designated number of steel ball bearings set in a model-specific diaphragm assembly.
Conversion is a straightforward install, replacing the factory pressure plate, springs and hub.
BELT DRIVES LTD
www.beltdrives.com