Renthal Steel Self-Cleaning 257 - 428 Output sprocketRef : RT00338A / 1077790001

RENTHAL Mud-Resistant Steel Sprocket 257 - 428, 13 Teeth (Manufacturer Part No: 257--428-13GP)

Designed for the motocross world and developed in competition, this Renthal sprocket combines precision machining with a mud-resistant profile to keep the transmission clean and efficient in muddy conditions. Its specific geometry facilitates mud evacuation and limits accumulation between the chain and the sprocket, ensuring consistent performance in technical sections.

• Type: Sprocket 257, mud-resistant version
• Material: Steel (nickel-chrome-molybdenum alloy known for its strength)
• Number of Teeth: 13
• Chain Pitch: 428
• Terrain Advantages: Better mud evacuation, reduced weight compared to the original part, good balance between efficiency and longevity
• Recommended Use: Competition / demanding riding

This sprocket is aimed at 85cc riders and motocross machines requiring a robust solution specifically designed to withstand muddy conditions. Compatible with certain YAMAHA YZ 85 models (e.g., YZ 85 LW BIG WHEELS 19/16 CB10, YZ 85 2026, YZ 85 CB09 2012) — check the original sprocket number before installation.