18T Front Sprocket 20mm Centre Hole for 428 Chain Fit 110cc 125cc 140cc Pit Pro Trail Dirt Bike ATV

Product Description

This 18-tooth front sprocket is designed for motorcycles and pit bikes that use a 428 drive chain and a 20mm centre hole. It serves as a suitable replacement for worn or damaged sprockets and helps maintain proper chain alignment and drivetrain function. Ideal for general servicing on pit bikes, trail bikes, dirt bikes, and small ATVs.

Features

18-tooth front sprocket suitable for 428 drive chains.
20mm centre hole designed to match many horizontal pit bike engine outputs.
Durable metal construction appropriate for regular riding conditions.
Simple installation with standard workshop tools.
Suitable for routine drivetrain maintenance and replacement.

Specifications

Tooth Count: 18T
Chain Size: 428
Sprocket Diameter: approx. 78mm
Centre Hole Diameter: approx. 20mm
Mount Hole Spacing (centre to centre): approx. 34mm
Material: Steel

Fitment

Compatible with many 110cc, 125cc, and 140cc pit bikes, trail bikes, dirt bikes, ATVs, and PIT PRO / Thumpstar–style models using a 428 chain and 20mm output shaft. Fitment may vary depending on engine version; confirming measurements is recommended.

Package Includes

1 × 18T Front Sprocket (428 chain type)

Shipping & Handling

Orders are shipped from Australia with next-business-day dispatch. Items are packed securely to prevent damage during delivery.