PBR Steel Standard 577 - 428 Gearbox output pinionRef : PBR00955A / 1077761001

PBR Standard Steel Sprocket 577 - 428 (manufacturer reference: 577 14 18NC) — a drive sprocket designed for demanding riders, stemming from PBR's experience in competition. Designed for Cross and Roadster uses, it fits transmissions that require a 428 chain pitch.

• Material: high-quality 18NCD5 steel alloy for a robust structure.
• Number of teeth: 14 teeth — standard ratio to preserve transmission longevity.
• Type / version: sprocket 577, standard version, ready to replace your original engine sprocket.
• Compatibility: suitable for 428 pitch chains.
• Advantages: high resistance to corrosion and abrasion, strict manufacturing process, and treatments that reduce friction.

Whether you are preparing for an off-road outing or refurbishing the running gear of a roadster, this sprocket offers a reliable and durable solution. Simple installation as a standard replacement, machined finish for optimal contact with the chain. Particularly suitable for the models listed below (check compatibility by year and reference):

• YAMAHA YZ 85 LW BIG WHEELS 19/16 (2026)
• KAWASAKI Z 125 (2024)
• MZ 125 SM (2008)