RFX Motorcycle crown Yamaha WR 450 F Pro Series 520

The RFX Pro Series Armalite sprockets are designed and tested at the highest level by racing teams in world and British championships.

The dual-sprocket design offers optimal performance, reduced weight thanks to a 7075-T6 aluminium centre, and longer tooth life due to the high-density carbon steel outer.

The Armalite sprockets also feature a hexagonal interface between the inner ring and the outer ring, a groundbreaking technology for sprockets that maximizes transmission between the two parts and eliminates any force exerted on the rivets.

Features:

• CNC machined 7075 aluminium inner ring
• HCS outer ring
• Hex-Drive placement between the inner and outer rings
• CAD-designed profile for added lightness.
• New style of mud clearance grooves to reduce wear.
• Stiff design increases torsion resistance.
• Anodised colour

Installation instructions:

• Start by placing the bike on a stand, with the rear wheel off the ground.
• Remove the chain and the wheel from the bike.
• While holding the hex key, loosen the nuts using an adjustable wrench.
• Remove all the nuts and the worn sprocket.
• Clean the hub perimeter, ensuring it's clean and free from debris.
• Take the new sprocket and place it on the hub, making sure it fits snugly and the bolt holes are properly aligned.
• Clean the bolts and nuts of the sprocket.
• Apply blue Loctite to each bolt and insert them into the holes.
• Screw the nuts onto the bolts by hand, ensuring the seals are intact and in good condition.
• Hold the hex key in place and tighten the nuts evenly.
• Tighten the nuts and bolts according to the user manual.
• Reattach the wheel to the bike, ensuring the chain is properly aligned and tightened per the manufacturer's specifications.

Features:

• colour: Black
• material: Aluminium
• v-colour: Black
• weight (g): 568
• width (mm): 310
• height (mm): 20
• length (mm): 310
• volume (cm³): 1922
• chain pitch: 520
• sprocket version: Standard
• v-number of teeth: 52 teeth
• number of teeth (sprocket): 52