• 420-19T Front Engine Sprocket (20mm) for 50cc–125cc Pit Bike & ATV - goofitmoto
  • 420-19T Front Engine Sprocket (20mm) for 50cc–125cc Pit Bike & ATV - goofitmoto
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GOOFIT

420-19T Front Engine Sprocket (20mm) for 50cc–125cc Pit Bike & ATV

420-19T Front Engine Sprocket (20mm) for 50cc–125cc Pit Bike & ATV

$12.99
$12.99
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Product Overview

The 420-19T Front Sprocket is the ultimate gearing solution for riders looking to maximize the top-end speed of their small-displacement engines. Specifically designed for the 20mm countershaft, this massive 19-tooth sprocket allows your 50cc to 125cc engine to cruise at much higher velocities while keeping RPMs low. Crafted from hot-treated steel, it is built to survive high-speed friction and deliver a smooth, efficient power transfer for your go-kart, dirt bike, or ATV.

Product Compatibility

Component Type Specification
Engine Displacement 50cc, 70cc, 90cc, 110cc, 125cc
Vehicle Types Dirt Pit Bikes, ATVs, Go Karts, 4-Wheelers
Chain Pitch 420
Shaft Fitment 20mm Countershaft
Compatible Brands TaoTao, Buyang, Kazuma, Sunl, Roketa, Coolsport

Specifications

Feature Details
Tooth Count 19T (19 Teeth)
Inner Diameter 20mm (0.78")
Mounting Hole Distance 30mm (1.18") center-to-center
Chain Style 420
Material Hot-Treated High-Strength Steel
Package Includes 1 x Sprocket, 1 x Locking Holder, 2 x Bolts

Key Features

  • Ultimate Top-End Velocity: The 19-tooth configuration is one of the largest available for this engine class, drastically increasing your top speed and making it perfect for flat-track racing or road cruising.
  • Complete Installation Kit: This sprocket comes as a full bundle, including a free locking holder (retainer clip) and mounting bolts, allowing for a direct and secure swap-out without needing extra hardware.
  • Hot-Treated Steel Construction: The steel undergoes a specialized thermal treatment to increase surface hardness, ensuring that the teeth resist wear and deformation even under sustained high-speed use.
  • Vibration Reduction: By lowering the engine RPM required to maintain speed, this sprocket helps reduce the numbing vibration often felt in the handlebars and footpegs of 110cc and 125cc bikes.
  • Precision Mechanical Fit: Designed to 420-chain standards, the precision-cut teeth ensure a perfect mesh that minimizes chain jump and mechanical noise.
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Fitment FAQ

Will this part fit my specific model and year?

This replacement part is intended for 50cc–125cc Pit Bike & ATV. It is best matched to original part number(s) 420-19T. Key physical/spec details from the product data include Tooth Count: 19T (19 Teeth), 19T (19 Teeth), Inner Diameter: 20mm (0.78"). Use the compatibility table and product photos together before ordering.

Do I need to match the OEM part number?

Yes. Match your original part number to 420-19T before purchase. For this replacement part, also compare the OEM number, dimensions, connector or mounting style, engine/model year, and product photos.

What models or situations does this part not fit?

Do not order this replacement part for machines outside the listed compatibility, or for units with different OEM numbers, dimensions, mounting points, connectors, or year-specific configurations. If your original part number does not cross-reference with 420-19T, treat the fitment as unconfirmed. Do not rely only on the model name or engine size.

What should I check before ordering?

Before ordering, compare your original part with the photos and check the OEM number, dimensions, connector or mounting style, engine/model year, and product photos. Confirm OEM/cross-reference number(s): 420-19T. Recheck listed specs such as Tooth Count: 19T (19 Teeth), 19T (19 Teeth), Inner Diameter: 20mm (0.78"). If any connector, mounting point, size, or year detail is different, confirm fitment before installation.