RFX Race 12 Teeth Gearbox output pinionRef : RFX00548A / 1123267001

RFX — Race Sprocket 12 Teeth (ref. FXFS 25-12 55ST)
Compact front sprocket designed for 420 transmissions, aimed at urban riders and motocross enthusiasts looking for a robust and reliable part for their chain. CNC machined from alloy steel, this sprocket features a hardening of 60 Rockwell for improved wear resistance and increased longevity under repeated load.

• Number of teeth: 12
• Chain pitch: 420
• Material: Alloy steel, silver finish
• Version: Standard
• Manufacturing: CNC machining and hardening

Ideal for adjusting the gearing and fine-tuning the handlebar response, this RFX front sprocket easily fits into the drivetrains of smaller displacement bikes. Its construction is aimed at durability and repeatability of ratios, whether for city sessions or motocross track outings.

Common compatibilities: KAWASAKI KX 85 II (2026), YAMAHA TT-R 110 E (2022), SUZUKI RM 65 (2005). Check the chain pitch and spacing before installation to ensure proper fit on your machine.