Description
Sealed Chain 428UO – O-Ring Drive Chain for 150cc Motorcycles
A reliable drivetrain starts with the right chain. The 428UO Sealed Chain is engineered as a durable O-Ring Sealed Chain solution for motorcycles up to 150cc, delivering smooth power transmission, long service life, and reduced maintenance under everyday riding conditions.Designed for commuter bikes, lightweight off-road machines, and classic motorcycle platforms, this chain offers a dependable balance between performance and durability.
Why a Sealed Chain Makes a Difference
Standard non-sealed chains often lose lubrication quickly and allow dust, water, and debris to enter the pin and bushing area. Over time, this leads to faster chain stretch, increased noise, and frequent adjustment or replacement.A Sealed Chain uses an internal sealing structure to keep lubricant where it matters most while blocking external contamination. For 150cc motorcycles used in city traffic or mixed riding environments, this design greatly improves consistency and riding comfort.
Simply put, a sealed chain lasts longer and requires less attention.
428UO as an O-Ring Sealed Chain
The 428UO belongs to the O-Ring Sealed Chain category, the most widely adopted sealing technology in motorcycle drivetrains. Elastic O-rings are positioned between the inner and outer plates, forming a secure seal around each pin and bushing.This structure provides:
- Stable lubrication retention
- Reduced internal friction and wear
- Slower chain elongation
- Reliable performance over long mileage
Precision Engineering and Key Specifications
The 428UO Sealed Chain is manufactured in accordance with international 428 chain standards to ensure accurate fitment and smooth operation.Chain Type: Sealed Chain (O-Ring Chain)
Pitch: 12.7 mm
Inner Link Minimum Width: 7.85 mm
Maximum Roller Diameter: 8.51 mm
Minimum Tensile Strength: 2100 kgf
Average Tensile Strength: 2400 kgf
Recommended Engine Size: ≤150cc
These specifications ensure precise engagement with sprockets and stable load handling during acceleration and cruising.
Performance Advantages in Daily Use
The chain plates are produced through precision forging, with tight tolerances between pins and bushings to minimize power loss. Combined with the sealed lubrication system, the 428UO Sealed Chain can deliver two to three times the service life of a standard non-sealed chain under similar riding conditions.High-precision rollers also contribute to low operating noise and smooth rotation, improving ride quality in urban environments.
Installation and Maintenance Notes
The 428UO is compatible with standard installation tools and original-spec sprockets. When installing, ensure the correct link count and secure riveting for optimal safety.For maintenance, regular surface cleaning with water or neutral detergent is sufficient. Avoid aggressive chemical solvents that may damage the O-rings. Occasional lubrication of the outer plates helps maintain smooth operation.
For best results, pairing the chain with matching sprockets is recommended.
Typical Applications
This O-Ring Sealed Chain is suitable for:≤150cc commuter motorcycles
Lightweight off-road and dual-purpose bikes
Retro and classic motorcycle models
Riders who prioritize durability, low noise, and long service life
It is compatible with most common 428 sprocket systems used across popular motorcycle brands.
Product Summary
The 428UO O-Ring Sealed Chain sets a new performance reference for 150cc motorcycles. By combining precision manufacturing, proven sealing technology, and standardized dimensions, it delivers reliable power transmission with minimal maintenance.Whether for daily commuting or mixed riding conditions, this Sealed Chain is designed to keep your drivetrain running smoothly, mile after mile.
