Fitment

• 2014-2019 BMW S1000XR

GFRS "GoFast" 520 Conversion Street kit with laser cut steel rear sprocket. Gearing one down in front, stock rear. RX3 Vortex Chain.

Vortex Steel Front Sprocket

• Drilled lightening holes reduce rotating mass
• High carbon steel for maximum strength
• Special Vortex Nichel plating to resist corrosion
• Induction hardened to reduce surface wear
• Precise tolerances to ensure concentricity

Vortex Steel Rear Sprocket

• Black satin electro-plated finish to resist corrosion
• Manufactured from carbon steel
• Ideal Tooth Design for perfect chain hold and release
• Each sprocket is cupped down from the tooth ring to the body to reduce as much weight as possible
• Maximum wear resistance. Hardened teeth ensure that the sprocket will hold up to many miles without affecting strength
• Precision manufactured and induction hardened to precise tolerances.

Vortex RX3 Chain

• Drilled links reduce rotating mass
• X-ring seals to reduce friction
• Improved tensile strength
• Includes rivet type connecting link

Specs

• Series: GFRS
• Ratio: 2.81
• Front Sprocket Teeth: 16
• Rear Sprocket Teeth: 45
• Front Sprocket Type: Steel
• Rear Sprocket Type: Steel
• Chain Size: 520
• Chain Links: 128
• Chain Color: Black
• Chain Strength: 9400

Brand: Vortex Racing
Part Number: CK6431