Chain Guide Protector for 420 & 428 Chains | Fits CRF, EXC, YZF, Apollo, & BSE Pit Bikes

Product Overview

The Universal Heavy-Duty Chain Guide is your first line of defense against drivetrain failure. Designed to fully wrap around the chain, this protector ensures perfect alignment as the chain feeds onto the rear sprocket. By preventing derailment during aggressive off-road maneuvers or high-speed jumps, it effectively eliminates the risk of the chain "bunching up" and shattering your engine case. Whether you are racing a CRF 250 R or trail riding on a 125cc pit bike, this guide provides essential security for your drive system.

Product Compatibility

Component Type	Specification
Chain Pitch	420 and 428
Engine Displacement	50cc, 110cc, 125cc, 140cc, 150cc, 160cc, up to 250cc
Bike Models	Honda CRF, KTM EXC, Yamaha YZF, Kawasaki KXF
Chinese Brands	Apollo, BSE, Bosuer, Xmotos, SSR, Thumpstar
Vehicle Types	Dirt Pit Bikes, Motocross, Off-Road Motorcycles

Specifications

Feature	Details
Dimensions	4.33" x 1.38" x 2.76" (110mm x 35mm x 70mm)
Mounting Bolt Pitch	38mm (1.5") center-to-center
Material	High-Impact Reinforced Polymer
Protection Style	Full-Wrap (Enclosed)
Function	Derailment Prevention & Sprocket Alignment

Key Features

• Anti-Derailment Safety: The enclosed "full-wrap" design keeps the chain securely on track, even when riding through deep ruts, mud, or over large obstacles where chain slack is common.
• Engine Case Protection: Acts as a critical safeguard; by preventing the chain from jumping off the sprocket, it protects the expensive engine crankcase from being cracked or damaged.
• Universal 420/428 Compatibility: Precision engineered to work seamlessly with both standard 420 and heavy-duty 428 pitch chains, making it a versatile upgrade for most small-to-mid displacement dirt bikes.
• Rugged Construction: Manufactured from high-strength materials designed to endure constant chain friction and resist impacts from rocks, roots, and trail debris.
• Standard Fitment: Featuring a universal 38mm screw pitch, this guide is a direct replacement for many factory guards on major pit bike brands like Apollo and BSE.