RFX Pro Series Elite Aluminium - 428 SprocketRef : RFX00359A / 1123229009

The RFX Pro Series Elite crown made from 7075 aluminum is designed for motocross riders looking for a lightweight, precise, and durable component. CNC machined and CAD designed, it features an optimized profile to reduce weight without compromising stiffness. The mud evacuation grooves facilitate self-cleaning of the chain/crown triangle in muddy conditions, thus extending the lifespan of both the chain and the crown.

Technical specifications:

• Material: CNC machined 7075 aluminum.
• Number of teeth: 50 teeth (profile 428).
• Chain pitch: 428, compatible with standard transmissions.
• Color: anodized blue, brand-coded for quick identification.
• Laser-engraved RFX logo for a polished finish.
• CAD design and tight tolerances for a precise fit with the chain.
• Stiff design to increase resistance to torsion during loads and accelerations.

Ideal for 85cc machines and other motocross models using the 428 pitch — notably including YAMAHA YZ 85 and SUZUKI RM 85 depending on the setup. Manufacturer reference: FXRS 35-50 99BU. A reliable crown for those seeking lightweight, durability, and a racing look on their motocross bike.