Wholesale The Motorcycle Sprocket 15*42 Suppliers, Exporter

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Wholesale The Motorcycle Sprocket 15*42 Suppliers, Exporter

The Motorcycle Sprocket 15*42 is a heavy-duty drivetrain component engineered for 420-series chains, featuring 15 teeth for optimized torque transfer and compatibility with mid-displacement motorcycles. It delivers reliable power transmission and long-lasting performance for on/off-road use.

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Product Description

Product Overview

The Motorcycle Sprocket 428-42T is a core rear (or countershaft) sprocket designed to pair with 428-standard roller chains—widely used in mid-displacement motorcycles. Its "428" designation aligns with the industry 428 chain pitch (12.7mm), ensuring seamless meshing with 428 chains (e.g., 428H, 428X). The "42T" denotes 42 teeth, a popular specification that balances torque output and top speed: more teeth enhance low-end pulling power (critical for off-roading or heavy loads) without excessive speed loss.

Key Advantages

1. Optimized Torque & Speed Balance: 42 teeth design boosts low-to-mid range torque (ideal for climbing or accelerating with loads) while maintaining usable top speed for highway riding.

2. Superior Wear Resistance: Heat-treated (HRC 55–60) steel construction hardens tooth surfaces, reducing abrasion from chain contact and extending service life by 35% vs. standard sprockets.

3. Perfect 428 Chain Compatibility: Precision-machined tooth profile matches 428-series chains (12.7mm pitch), eliminating chain slip, noise, or premature wear.

4. Impact-Resistant Build: Alloy steel core absorbs shock from rough terrain (e.g., dirt roads, potholes) without chipping or bending, ensuring durability in harsh conditions.

Applications

1. Mid-Displacement Street Motorcycles: Fits 125–400cc sport bikes, cruisers, and naked bikes (e.g., Honda CB300R, Yamaha MT-03) as a rear sprocket for balanced performance.

2. Dual-Sport & Off-Road Bikes: Used in 200–400cc dual-sports (e.g., Suzuki DR650S, Kawasaki KLX300) to enhance off-road torque for climbing and trail riding.

3. Light Utility Motorcycles: Compatible with 150–300cc cargo bikes or delivery scooters (e.g., TVS XL100 Heavy Duty) to handle load-bearing demands.

4. Custom Drivetrain Upgrades: Ideal for riders modifying mid-displacement bikes to prioritize low-end power (e.g., off-road conversions, urban commuting tweaks).

Product Specification

Specification Item	Details
Sprocket Type	Motorcycle Rear/Countershaft Sprocket (428-Spec)
Chain Compatibility	428-Series Roller Chains (Pitch: 12.7mm / 0.5 inch)
Tooth Count (T)	42 Teeth
Construction Material	Heat-Treated High-Carbon Steel (1050) or Alloy Steel (42CrMo)
Surface Treatment	Black Oxide / Zinc Plating (anti-rust) or Hard Chrome Coating
Tooth Hardness	HRC 55–60 (Surface), HRC 30–35 (Core, for toughness)
Mounting Hole Pattern	Universal fit (varies by model; typically 4–6 bolt holes, 50–70mm PCD)
Outer Diameter	~170mm (calculated as: Pitch × (Tooth Count / π) + Pitch)
Thickness	6–8mm (standard for mid-displacement motorcycles)
Compatible Engine Range	125–400cc 4-Stroke Gasoline Engines
Typical Service Life	15,000–25,000 km (paired with regular chain maintenance)

Frequently Asked Questions

Q1: What does the "428-42T" specification mean?

The "428" indicates compatibility with 428-standard roller chains with a 12.7mm pitch, while "42T" specifies that the sprocket has 42 teeth, designed to balance acceleration torque and top speed.

Q2: Which motorcycle displacements is this sprocket suitable for?

This sprocket is engineered for mid-displacement motorcycles ranging from 125cc to 400cc, including street bikes, dual-sports, off-road bikes, and light utility cargo vehicles.

Q3: How durable is the 428-42T sprocket under heavy usage?

Built from heat-treated high-carbon steel (1050) or alloy steel (42CrMo), the teeth boast a surface hardness of HRC 55–60. This setup extends its service life by 35% compared to standard, non-hardened sprockets.

Q4: What is the expected service life of this product?

With standard regular chain cleaning and lubrication maintenance, the sprocket typically lasts between 15,000 to 25,000 kilometers.

Q5: Does this sprocket offer rust resistance?

Yes. The sprocket undergoes professional anti-rust surface treatments, such as Black Oxide, Zinc Plating, or Hard Chrome Coating, to protect it against corrosion and harsh outdoor elements.