420-10T Front Engine Sprocket (20mm) for 110cc–125cc Dirt Pit Bike & ATV

Product Overview

Boost the low-end torque of your small-displacement engine with this 420-10T Heavy-Duty Front Sprocket. Designed for 110cc and 125cc horizontal engines, this 10-tooth sprocket is the ideal choice for riders looking for more "punch" out of corners or better climbing power. Crafted with high machining accuracy, it ensures a perfect mesh with your 420-size chain, providing reliable power transfer and precise mechanical timing.

roduct Compatibility

Component Type	Specification
Engine Displacement	110cc, 125cc (Horizontal Engines)
Vehicle Types	Dirt Pit Bikes, Mini Bikes, ATVs, 4-Wheelers
Chain Size	420
Common Brands	Coolster, SSR, Apollo, TaoTao, Piranha

Specifications

Feature	Details
Tooth Count	10T (10 Teeth)
Shaft Diameter	20mm
Inner Diameter (Gear)	17.5mm (0.68")
Outer Diameter	45mm (1.77")
Chain Pitch	420
Material	Heat-Treated High-Strength Steel

Key Features

• Enhanced Low-End Torque: The 10-tooth configuration is optimized for better acceleration and torque, making it perfect for technical trails and off-road mini-bike applications.
• Precision Machining: Manufactured with tight tolerances to ensure the sprocket sits perfectly on the 20mm output shaft, reducing vibration and protecting your engine’s crankshaft.
• Superior Thermal Stability: Engineered to resist high-temperature oxidation, this sprocket maintains its hardness even during prolonged, high-RPM operation in air-cooled engines.
• Wear-Resistant Finish: Treated for high abrasion resistance, the sprocket teeth are built to survive the grit and mud of dirt bike riding without premature rounding or hooking.
• Reliable Power Transmission: Acts as a critical link in your vehicle's drive system, ensuring the transmission of power is smooth, consistent, and accurately timed with the engine's output.