RFX Motorcycle crown Fantic XX 125 [125]/Yamaha YZ 250 F (CG33) [250]

The RFX Pro Series Hi-Carbon Steel (HCS) sprockets are perfect for riders looking for longevity and great value for their sprockets, while offering authentic quality that can't be found anywhere else.
The certified high-carbon steel provides 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 tolerance levels.

Features

• Certified high-carbon steel
• CNC laser cutting.
• CAD-designed profile for added lightness.
• Mud evacuation grooves to reduce wear.
• Sturdy design increases torsion resistance.
• Tighter tolerances enhance performance.

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 with a spanner.
• Remove all nuts and the worn sprocket.
• Clean the area around the hub, ensuring it is free from debris.
• Take the new sprocket and place it on the hub, making sure it fits well and the bolt holes are correctly aligned.
• Clean the bolts and nuts for 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 that the chain is properly aligned and tightened according to the manufacturer's specifications.

Specifications:

• colour: Silver
• material: Steel
• v-colour: Silver
• weight (g): 500
• width (mm): 315
• height (mm): 20
• length (mm): 305
• volume (cm³): 1922
• chain pitch: 520
• sprocket version: Standard
• v-number of teeth: 50 teeth
• number of teeth (sprocket): 50