420DX Motocross Chain — 125cc Ready
420DX Motocross Chain Product data information
| Model No | Pitch (mm) P | Roller Link Width (Min.) (mm) W | Roller Diameter (Max.) (mm) D | Pin Link Plate Thickness (mm) T1 | Inner Link Plate Thickness (mm) T2 | Inner Link Plate Height (mm) H | Pin Diameter (mm) d | Overall Width Riv. (mm) L | Overall Width Con. (mm) G | Minimum Tensile Strength (kgf) | Average Tensile Strength (kgf) | Displacement Application (Max.) (cc) |
| 420DX | 12.7 | 6.25 | 7.77 | 1.8 | 1.8 | 11.8 | 3.95 | 16.25 | 17.7 | 2100 | 2350 | 125 |
420DX Motocross Chain 125cc
The 420DX Cadena de motocross is engineered for riders who demand stable performance, extended durability, and reliable power delivery on 50cc–125cc off-road motorcycles. Upgraded alloy steel, triple-seal technology, and precision-matched components make this chain ideal for harsh riding conditions including mud, rocks, sand, and wet terrain.
Designed and manufactured in our China factory, this chain gives OEM brands, distributors, and racing teams a durable and economical solution for motocross applications.
What Is the 420DX Motocross Chain?
The 420DX is a lightweight yet reinforced off-road motorcycle chain optimized for 125cc engines. It features a triple-barrier O-ring sealing system, brass-coated bushings, and chromated pins to maintain lubrication, block mud infiltration, and reduce internal wear.
Max displacement: 125cc
Average tensile strength: 2350 kgf
Available colors: gold, blue, red, original
Lengths: multiple options with clip-type master link included
This chain is suitable for riders who need smooth power transfer but also want components that can survive rough motocross environments.
Key Features of the 420DX Motocross Chain
Triple-Seal O-Ring System
A thin, heat-resistant fluoropolymer O-ring sits between the inner and outer plates. It serves two core functions:
- Blocks mud, sand, and fine debris
- Locks in high-viscosity lubricant to maintain long-term smooth rotation
- This design increases lifespan up to 3× longer than non-sealed chains
Upgraded Alloy Steel Components
Every component is engineered to resist impact and fatigue:
- Seamless rollers
- Seamless bushings
- Thickened, chromated alloy pins
- Strengthened inner and outer plates
- In-house heat treatment for added toughness
Despite being compact and lightweight, the chain withstands aggressive clutching, sharp acceleration, and constant vibration on dirt tracks.
Optimized for Small-Gap Motorcycles
The 420DX uses an ultra-thin sealing ring that reduces friction and avoids power loss on bikes with tight chain guide spacing.
Cold-start resistance is minimized due to reduced seal contact at low speed.
Performance Advantages on 125cc Motocross Bikes
- Stable Acceleration & Low Friction:The chain maintains lubrication internally at all times, which reduces horsepower loss and supports clean throttle response.
- Reliable in Muddy & Sandy Terrain:The sealing ring prevents mud and sand from damaging internal components, a common failure point in non-sealed chains.
- Longer Track Time, Fewer Replacements:Its 3× lifespan means riders spend more time riding and racing and less time replacing chains.
Aplicaciones
The 420DX Cadena de motocross is ideal for:
- Motocross
- Trail riding
- Desert racing
- Pit bikes
- Small competition off-road motorcycles
Engine displacement recommendation: Up to 125cc
Especificaciones técnicas
| Especificación | Valor |
|---|---|
| Modelo | 420DX Motocross Chain |
| Max Displacement | 125cc |
| Resistencia media a la tracción | 2350 kgf |
| Estructura | Seamless bushing + seamless roller |
| Tipo de sello | Ultra-thin triple-barrier O-ring |
| Colors | Gold / Red / Blue / Original |
| Material | Upgraded alloy steel |
| Campo de golf | Multiple length options |
Why Choose Our Factory?
As a China-based manufacturer, we supply OEMs, wholesalers, and global racing teams with:
- Full production capacity
- Stable material quality
- Custom color, length, and packaging
- Competitive B2B wholesale pricing
- Strict QC from raw steel to assembly
Preguntas frecuentes
The 420DX is specifically designed for 50cc–125cc off-road motorcycles, offering high performance, durability, and stable power delivery.
With its triple-seal O-ring system, the 420DX chain lasts up to 3 times longer than non-sealed chains, even in harsh riding conditions.
The chain features a triple-seal O-ring system, upgraded alloy steel components, seamless bushings, and brass-coated bushings for improved longevity and performance.
Yes, the 420DX is ideal for racing, trail riding, desert racing, and pit bikes, designed to withstand aggressive riding and harsh environments.
Yes, the 420DX chain is available in multiple colors (gold, red, blue, original) and lengths, with custom options available for bulk orders.
The 420DX chain is proudly manufactured in China, ensuring high-quality standards, strict QC, and competitive pricing for OEMs and wholesalers.
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