Speedwerx BCC-ADAPT-858 Billet Primary Clutch Cover for 2025 Yamaha 858 Models

The Speedwerx BCC-ADAPT-858 Billet Primary Clutch Cover is engineered specifically for 2025 Yamaha 858 models, offering enhanced durability and performance. Crafted from high-quality billet aluminum, this clutch cover features increased material thickness and larger corner radiuses, reinforcing areas prone to failure and ensuring long-lasting strength. Its revised design incorporates additional support webbing and tie points that connect clutch towers securely, preventing flexing and maintaining optimal clutch engagement under demanding conditions. This upgrade does not sacrifice shift range, thanks to the innovative tower bushing material that maintains smooth operation while providing a tighter tolerance for improved feel and responsiveness. The lightweight construction makes it lighter than stock components, reducing overall weight and contributing to improved handling and acceleration. Designed with precision and attention to detail, the Speedwerx Billet Primary Clutch Cover is a reliable upgrade for serious riders seeking durability, precision, and enhanced performance on their Yamaha 858 models.

Features:

• Added tower bushing material without sacrificing shift range

• Tighter tower bushing tolerance for improved shift feel

• Additional support and webbing to tie clutch towers together and prevent flexing

• Lighter than stock to reduce overall weight

• Increased material thickness and larger corner radiuses to strengthen vulnerable areas

• Revised design for 2025 Yamaha 858 models with steel spider clutch