RFX Pro Series Elite Aluminium - 420 SprocketRef : RFX00297A / 1123219009

RFX Pro Series Elite Aluminum Sprocket - 420 (manufacturer part number: FXRS 15-53 99RD): a sprocket dedicated to motocross, machined for the demands of off-road final drive. Made from 7075 aluminum using CNC machining, it combines lightweight construction with precision manufacturing for consistent performance on muddy trails or bumpy tracks.

• Material: CNC machined 7075 aluminum
• Color: anodized red, color code by model
• Number of teeth: 53 teeth
• Chain pitch: 420
• Design: lightweight CAD profile, mud evacuation grooves
• Finishes: laser-engraved RFX logo, tight tolerances
• Type: standard, optimized rigidity against torsion

The grooves help limit mud accumulation around the teeth and contribute to cleaner chain engagement. The CAD-designed profile and reduced tolerances aim to improve chain/sprocket engagement, while the anodization protects the aluminum and provides a track-visible look.

Common compatibilities: Honda CRF 150 R (2026), CRF 150 R Big Wheels 16/19 (KE03) 2022, and CRF 150 R Std Wheels 14/17 (KE03) 2020. Before installation, check the chain pitch and positioning on your sprocket to ensure proper final drive adjustment.