RFX Motorcycle crown Gas Gas MC 250 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 centre made of 7075-T6 aluminium, and longer tooth life due to the special high-density carbon steel exterior.

The Armalite sprockets also feature a hexagonal interface between the inner and outer rings, a revolutionary technology for sprockets that maximises the transmission between the two parts and eliminates the 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 lightweight construction.
• New mud-release groove style to reduce wear.
• Stiff design enhances torsional strength.
• Anodised colour

Installation instructions:

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

Features:

• colour: Orange
• material: Aluminium
• v-colour: Orange
• weight (g): 500
• width (mm): 315
• height (mm): 20
• length (mm): 280
• volume (cm³): 1764
• chain pitch: 520
• sprocket version: Standard
• v-number of teeth: 49 teeth
• number of teeth (sprocket): 49