RFX Motorcycle crown Fantic XEF 450 Rally [450]/Yamaha WR 250 F (CG30) [250]

The RFX Pro Series Hi-Carbon Steel (HCS) sprockets are perfect for riders seeking durability and good value for their sprockets, while providing a quality that can't be found anywhere else.
The certified high-carbon steel offers unbeatable wear properties and its high strength compared to mild steel allows for a lighter profile, meaning the weight increase compared to aluminium is kept to a minimum.
The RFX HCS sprockets are laser cut for more precision and tighter tolerances.

Features

• Certified high-carbon steel
• CNC laser cutting.
• CAD-designed profile for added lightness.
• Mud evacuation grooves to reduce wear.
• Stiff design increases torsional strength.
• Tighter tolerances improve performance.

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 with a wrench.
• Remove all nuts and the worn sprocket.
• Clean the flange of the hub, ensuring it is clear and free of debris.
• Take the new sprocket and place it on the hub, making sure it fits properly and the bolt holes are correctly positioned.
• Clean the bolts and nuts for the sprocket.
• Apply blue Loctite to 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.
• Replace the wheel on the bike, ensuring that the chain is properly aligned and tensioned to the manufacturer's specifications.

Specifications:

• colour: Silver
• material: Steel
• v-colour: Silver
• 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