A carbon fiber sprocket cover for the Honda CBR1000RR replaces the stock plastic front-sprocket (drive) cover with a lighter, stiffer pre-preg carbon piece that resists chain-lube staining, boot scuffs, and sun damage. Bestem's version is 100% pre-preg Toray carbon fiber, autoclave-cured in matched-metal molds, finished with a proprietary UV-resistant clear coat rated to roughly 3,000 hours of exposure — about three times the ~1,000-hour rating of standard OEM clear coat — and backed by a lifetime warranty against sun-ray yellowing.
What does the sprocket cover do on a CBR1000RR?
The sprocket cover sits over the countershaft (front) sprocket on the left side of the engine. It does three jobs: it keeps chain lube and grit from flinging onto the engine cases and your left boot, it shields the sprocket and lower chain run from road debris, and it puts a barrier between a spinning sprocket and anything that should never touch it. Honda fits injection-molded ABS plastic from the factory — functional, but it scuffs, stains with chain wax, and can crack around the bolt holes as it ages.
Why upgrade to a carbon fiber sprocket cover?
The honest answer first: on a part this size, weight savings are measured in tens of grams, not kilograms. Riders make the swap for four practical reasons:
- Durability. Pre-preg carbon shrugs off the boot scuffs and lube splatter that permanently mark