420 Split Sprocket GREHUA Aluminum Sprocket for Mini Bike and Go Kart

Description

Product Overview

The GREHUA 420 split sprocket is engineered for high‑performance mini‑bike and go‑kart applications. Constructed from a premium aluminum alloy, the sprocket combines lightweight characteristics with exceptional durability, resisting wear even under aggressive riding conditions. Its split‑ring design allows for easy chain tension adjustment while maintaining precise tooth alignment for optimal power transfer. The component measures 7.17 by 6.73 by 0.67 inches and weighs just 1.1 pounds, making it a compact yet robust solution for small‑engine vehicles.
Designed to replace the original OEM part, the 420 split sprocket fits a wide range of models including Coleman CT200U, Baja Warrior, Motovox, and many other 212cc to 196cc engines. The included hub adapter features a special center hole that can be modified to accommodate DB30, CT100U, and other common configurations, ensuring a universal fit across multiple brands. The precise cutter tooth geometry reduces friction at high speeds, delivering smoother chain operation and higher output without sacrificing reliability.
The product carries the model number GR‑SA‑420LH05 and has earned a strong reputation in the powersports community, ranking #14 in the Powersports Sprockets category on a major online marketplace. Customer reviews average 4.3 out of 5 stars, reflecting consistent satisfaction with the balance of performance, ease of installation, and value. GREHUA’s commitment to quality control is evident in the tight tolerances and finish of each sprocket, which passes rigorous testing before shipment.

Usage

Ideal for racing enthusiasts, hobbyist builders, and everyday riders, the 420 split sprocket excels in environments where rapid acceleration and reliable chain engagement are critical. Whether navigating tight indoor tracks, off‑road trails, or street‑legal go‑kart circuits, the sprocket’s aluminum construction helps keep rotating mass low, improving handling and response. Its compatibility with both 42‑tooth chains and the optional adapter makes it adaptable for a variety of drivetrain setups.
Installation is straightforward thanks to the split‑ring architecture. Users can remove the old sprocket, place the new split halves, and secure them with the supplied six screws and nuts, completing the process in under thirty minutes for most riders. The design also allows for quick chain tension adjustments without disassembling the entire drivetrain, reducing downtime during maintenance or track sessions. Regular lubrication of the chain and periodic inspection of the sprocket teeth will extend service life and maintain optimal performance.

Why Choose Us

GREHUA has built its brand on delivering high‑quality components for powersports applications, and the 420 split sprocket exemplifies this philosophy. Each unit is forged from a single block of aluminum alloy, eliminating weak points that can arise from welded or cast constructions. The manufacturing process includes CNC machining for exact tooth spacing, followed by a protective anodized coating that resists corrosion and wear in harsh environments.
Beyond the material advantages, GREHUA provides comprehensive after‑sales support. Buyers receive access to detailed installation manuals, video tutorials, and a responsive customer service team ready to answer technical questions. The company also offers a limited warranty covering manufacturing defects, giving customers confidence that their investment is protected. This combination of engineering excellence and service commitment sets GREHUA apart from generic aftermarket alternatives.

Key Features

• Premium aluminum alloy construction delivers lightweight strength and long‑lasting durability for demanding riding conditions
• Split‑ring design enables easy chain tension adjustment and quick installation without full drivetrain removal
• Precision‑cut teeth reduce friction, providing smoother power transfer and higher output efficiency
• Universal hub adapter with modifiable center hole fits multiple engine models and common sprocket standards
• Dedicated customer support and warranty ensure reliable after‑sales service and peace of mind

Installation Guide

Begin by safely elevating the vehicle and removing the existing sprocket using the supplied hex key. Clean the hub surface to remove debris, then position the two halves of the GREHUA split sprocket on either side of the chain. Align the pre‑drilled holes with the hub bolt pattern, insert the six screws, and tighten each nut in a star pattern to ensure even pressure. Verify chain tension by checking the slack at the midpoint of the chain; adjust as needed by loosening the nuts slightly, moving the sprocket halves, and retightening. Once satisfied, spin the wheel to confirm smooth operation and re‑check all fasteners after the first 20‑minute ride.

Maintenance Tips

Regular maintenance prolongs the life of the split sprocket and the drivetrain as a whole. After each riding session, wipe the sprocket and surrounding hub with a clean cloth to remove dust, oil, and grit that can accelerate wear. Apply a light coat of high‑temperature chain lubricant to the chain links, allowing the lubricant to penetrate the teeth of the sprocket. Inspect the teeth for signs of wear or deformation periodically; replace the sprocket if the tooth profile becomes rounded or chipped. Keep the hub adapter bolts torqued to the manufacturer’s specification, typically around 8‑10 Nm, to prevent loosening under vibration.

Performance Benefits

The combination of reduced rotating mass and precise tooth geometry translates into measurable performance gains on the track. Riders report quicker acceleration off the line, smoother gear shifts, and a noticeable increase in top‑end speed when using the GREHUA 420 split sprocket compared to standard steel alternatives. The aluminum material also contributes to better heat dissipation, helping to maintain chain lubrication and preventing overheating during prolonged high‑speed runs. These advantages are especially valuable in competitive racing environments where every fraction of a second counts.

Customer Experiences

Feedback from the community highlights the ease of installation and the immediate improvement in ride quality. Many users appreciate the ability to fine‑tune chain tension without disassembling the entire rear wheel, a feature that saves time during practice sessions. Several long‑time enthusiasts have upgraded multiple bikes with the same model, noting consistent performance and durability across different chassis. The positive reviews often mention the responsive support team, which assists with fitment questions and provides guidance for custom adaptations.

FAQ

What chain size does the 420 split sprocket support?

The sprocket is designed for a 42‑tooth chain, which is the standard size for most 212cc to 196cc mini‑bike and go‑kart engines. The included hub adapter also accommodates the chain width, ensuring a secure fit.

Can the hub adapter be modified for other engine models?

Yes, the adapter features a special center hole that can be drilled or re‑tapped to match DB30, CT100U, Motovox, and other common configurations. This flexibility allows the sprocket to serve a broader range of vehicles.

Is the aluminum sprocket compatible with high‑torque applications?

Absolutely. The high‑grade aluminum alloy provides a strong yet lightweight solution that can handle the torque demands of racing and aggressive riding. The precision‑cut teeth further distribute load evenly, reducing stress on individual teeth.

What warranty does GREHUA offer on this sprocket?

GREHUA provides a limited warranty covering manufacturing defects for a period of one year from the date of purchase. This warranty does not cover damage caused by improper installation or misuse.