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Fully wraps the chain to guide it onto the rear sprocket. Stainless steel hardware, anodized aluminum plate, and plastic buffer for low friction. Saves expensive engine cases.

Black hard anodized alloy sprocket. Machined sprockets made from 7075 T651 aluminum reduces distortion and provides optimal thickness, to extend sprocket and chain life.

Complete big bore kit. Bolt it on and ride!

• Includes a pre-bored, big-finned aluminum cylinder for improved cooling
• Cylinder, rings, piston pin, & clips
• BBR exclusive performance camshaft
• Heavy-duty valve springs
• Rockers with tappet adjusters
• Gasket kit

Heavy duty springs help prevent clutch slip in high-performance motors.

• Custom wound from chrome-silicon wire
• Preset for long life
• Higher spring seat pressure to resist clutch slip