428-19T Front Engine Sprocket (20mm) for 50cc–90cc Pit Bike & ATV

Product Overview

Maximize your top-end potential with the 428-19T High-Performance Front Sprocket. Specifically designed for engines with a 20mm output shaft, this 19-tooth sprocket is the ultimate "high-speed" gearing upgrade for 50cc to 90cc pit bikes and ATVs. By increasing the tooth count, you allow your vehicle to reach much higher top speeds while reducing engine strain at cruising velocity. Built from high-strength, abrasion-resistant materials, it ensures every ride is smooth, efficient, and reliable.

Product Compatibility

Component Type	Specification
Engine Displacement	50cc, 70cc, 90cc
Vehicle Types	Dirt Pit Bikes, ATVs, 4-Wheelers, Mini Bikes
Chain Pitch	428 (Heavy Duty)
Shaft Fitment	20mm Countershaft
Common Brands	TaoTao, SSR, Coolster, Apollo, Kazuma

Specifications

Feature	Details
Tooth Count	19T (19 Teeth)
Inner Diameter	20mm (0.78")
Chain Style	428 Style
Material	High-Strength Alloy Steel
Properties	Abrasion & Corrosion Resistant

Key Features

• Ultimate Top-Speed Optimization: The 19-tooth configuration is engineered for "gearing up," providing a significant boost in top-end velocity and making it ideal for open trail riding or road cruising.
• Precise Tooth Engagement: Featuring an optimized tooth shape, this sprocket bites tightly into the 428 chain. This precise fit reduces "chain jump" and minimizes power loss, ensuring a more responsive and fun driving experience.
• Extreme Durability: Manufactured from high-strength materials with excellent abrasion and corrosion resistance, this sprocket is built to maintain stable operation even in harsh off-road environments.
• Smooth Power Transmission: The precision-machined tooth profile enhances the vehicle’s power transmission performance, leading to a quieter drivetrain and a more refined feel at high RPMs.
• DIY-Friendly Installation: Designed with a compact and reasonable layout, the installation process is fast and simple. No complex tools or professional skills are required, allowing users to handle the replacement themselves with ease.