Renthal Steel Self-Cleaning 503 - 428 Gearbox output pinionRef : RT00067A / 1074310002

Renthal Steel Mud-Resistant Sprocket 503 - 428 (Ref. 503--428-14GP)

Designed for the Motocross world, this 14-tooth Renthal sprocket with a 428 pitch combines durability and mud evacuation to maintain performance in muddy conditions. Made from high-strength steel and precision machined, it easily fits into competition transmissions where reliability and consistent performance are essential.

• Type: Sprocket 503, mud-resistant version
• Material: High-strength steel
• Teeth: 14 teeth (428 pitch)
• Mud-resistant profile for better evacuation and less accumulation between teeth
• Reduced weight compared to original parts, for a balance of efficiency and longevity
• Designed and appreciated in competition for its precise machining

The Renthal 503--428-14GP sprocket is a suitable choice for 85cc machines and other models requiring a 14-tooth sprocket in 428. Common applications include: GAS GAS MC 85, KTM 85 SX, and HUSQVARNA TC 85 (models listed for reference). Replace your original sprocket while adhering to the mounting specifications and recommended chain tension to preserve the transmission and extend the lifespan of the components.