420-11T Front Engine Sprocket (20mm) for 50cc–125cc Dirt Pit Bike & ATV

Product Overview

Upgrade your drivetrain with this 420-11T Precision Front Sprocket, engineered for small-displacement engines ranging from 50cc to 125cc. Built from high-strength steel and refined through a rigorous heat-treatment process, this sprocket is designed to survive the high-impact environment of off-road riding. The 11-tooth design offers a versatile balance between acceleration and top speed, ensuring your pit bike or ATV performs reliably on various terrains.

Product Compatibility

Component Type	Specification
Engine Displacement	50cc, 70cc, 90cc, 110cc, 125cc
Vehicle Types	Dirt Pit Bikes, Mini Bikes, ATVs, 4-Wheelers, Mopeds
Chain Size	420
Engine Type	Standard Horizontal & Vertical Engines with 20mm Shafts

Specifications

Feature	Details
Tooth Count	11T (11 Teeth)
Shaft Diameter	20mm (0.78")
Chain Pitch	420
Material	Heat-Treated High-Strength Steel
Manufacturing	Full CNC Precision Machined

Key Features

• Advanced Heat Treatment: Subjected to a strict hardening process to significantly improve impact strength and wear resistance, reducing the need for frequent replacements due to tooth rounding.
• Precision CNC Machining: Every tooth is CNC-cut to ensure an exact mesh with the 420 chain. This precision engineering virtually eliminates "chain jump" and significantly reduces operational noise.
• Balanced Performance Profile: The 11-tooth configuration provides a smooth power curve, offering better low-end response than larger sprockets while maintaining a respectable top speed.
• High Stability & Durability: Designed to handle the sudden torque loads of off-road riding, the high-strength steel construction ensures the sprocket remains stable on the output shaft under heavy use.
• Quiet & Smooth Operation: By improving the accuracy of the chain-to-tooth interface, this sprocket enhances the overall smoothness of your drive system, making for a more enjoyable and controlled riding experience.