Huzhou Dongyao Chain Industry Co., Ltd. is one of the leading manufacturers and suppliers of 25hh timing chain in China. With abundant experience, we warmly welcome you to buy high quality 25hh timing chain from our factory. Also, custom service is available.
The DYLinkar 25HH Timing Chain is a heavy-duty and precise chain specially designed for the timing system of high-load engines. Model 25HH features thickened chain plates and reinforced alloy steel materials, which offer higher tensile strength and fatigue resistance compared to the ordinary 25N/25H models. It can withstand greater dynamic loads. Its optimized pin shaft and sleeve assembly process reduces friction loss and maintains good high-temperature resistance and dimensional stability. This chain is suitable for timing transmission in modified motorcycles, high-speed racing engines, and small turbocharged engines.
Key Features
The thickened chain plate design significantly enhances the overall tensile strength and impact resistance of the chain.
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Strengthened alloy steel with special heat treatment, featuring a fatigue life superior to that of standard timing chains.
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Low-friction precise fitting reduces power loss in the engine timing system.
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Excellent high-temperature resistance and dimensional stability.
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High-load specialized design, specifically developed for demanding conditions such as modified motorcycles and racing engines.
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Technical specifications
Product Images
Material & Surface Treatment
| Link plate | 40Mn |
| Small tube | AISI 1020 (20#) |
| Pin shaft | 20CrMnTi |
| Part processing | Heat treatment and quenching |
| Service life | Over 50,000 kilometers |
Available Options
| Links | 68 - 102 Links |
| Color | Natural / Yellow / Blue / Gold / Silver / Colorful |
| Type | Heavy duty |
| Master link | Without master link |
| Packaging | Carton / Pallet |
Application
High-performance modified motorcycle: Suitable for modified street or off-road motorcycles with an engine displacement of 125–250cc.
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Competitive small engines: such as two-stroke or four-stroke high-speed engines used in mini road racing cars and karting vehicles.
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Small turbocharged gasoline engine: Suitable for 0.8–1.0L turbocharged micro cars or hybrid engines.
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High-load general-purpose power equipment: such as off-road motorcycles, ATVs, snowmobiles, etc.
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Compatibility
Fits 25H / 25HH timing chain systems - Compatible with standard 25H and 25HH specifications of timing chain wheels, guides and tensioners.
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Direct replacement for OEM 25HH chains – It can be directly substituted for the original or aftermarket 25HH series heavy-duty timing chains.
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Suitable for high-performance engines up to 250cc (motorcycles) / 1.0L turbo (cars) - Suitable for 125–250cc modified motorcycle engines and 0.8–1.0L small turbocharged engines.
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Compatible with leading brands – It can replace the 25HH specification timing chains of brands such as DID, RK, and BorgWarner.
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Wide compatibility for upgraded powertrains – Suitable for high-performance karting cars, mini road racing vehicles, high-powered ATVs and heavy-duty general-purpose power equipment.
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Customization Capability
Product Delivery
About Us
Why choose DYLinkar?
20+ years of expertise in motorcycle chain exports.
Reliable quality & reasonable prices – a winning combination trusted worldwide, especially in emerging markets like Southeast Asia, Africa, South America, and the Middle East.
Customized service – we work closely with clients to develop solutions that suit local lifestyles and promotion strategies.
Win-win cooperation – we believe our top-notch products and excellent service will drive shared success and market expansion.
Let's build a mutually beneficial partnership.
FAQ
Q: What are the differences between oil-sealed chains and non-oil-sealed chains?
A: The oil-sealed chain is equipped with O-shaped or X-shaped sealing rings, which can seal the lubricating oil in the gap between the pin shaft and the sleeve, preventing dust and dirt from entering, reducing wear and extending the lifespan. The non-oil-sealed chain does not have a sealing ring and requires frequent oiling but has a higher transmission efficiency.
Q: Which type does DYLinkar mainly produce?
A: DYLinkar offers a full range of oil-sealed chains and non-oil-sealed chains to meet different riding scenarios and budget requirements. The oil-sealed chain has become the mainstream direction in the current market.
Q: What materials and processes are used for the chain of DYLinkar?
A: The DYLinkar chain is made of high-quality alloy steel. It is manufactured through processes such as precision stamping, heat treatment, and surface treatment. The high-strength material can effectively resist corrosion and rust. The precise craftsmanship ensures the dimensional accuracy and lubrication performance of each link, preventing knots and ensuring smooth chain operation.
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