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Bridging the gap between high engine power and optimal friction performance in modern multi-plate wet clutch systems.
In the global motorcycle manufacturing and aftermarket ecosystem, the lubrication of wet clutch multi-plate systems represents one of the most complex challenges in tribological engineering. Unlike passenger vehicle engines, which utilize separate engine oils and dry-plate clutches, most motorcycles integrate the engine, transmission, and wet clutch system into a single shared oil sump. This configuration requires the lubricant to perform contradictory tasks simultaneously: minimizing friction within the cylinder and valve train while maintaining a critical level of dynamic and static friction within the clutch plates to prevent slippage.
As a leading Wholesale Top Wet Clutch Motorcycle Oil Factory Supplier & Exporter, we leverage advanced chemistry to formulate fluids that conform rigorously to the JASO T 903:2016 specification (primarily the JASO MA, MA1, and MA2 categories). By carefully managing dynamic frictional characteristics, static friction indexes, and clutch slip limits, our formulations provide smooth gear shifts, maximum power transfer, and prolonged clutch system lifespan even under extreme thermal and mechanical shear stresses.
An Industry Pioneer with Over 15 Years of Dedicated Manufacturing and Formulation Development
Established in 2009 and headquartered in Zibo, Shandong, Shandong Longhai Lubrication Technology Development Co., Ltd. is a state-recognized high-tech enterprise integrating research and development, manufacturing, and international trade operations. Over the past 15 years, we have built a fully integrated industrial supply chain, providing world-class lubrication solutions for both heavy industrial machinery and demanding automotive or transport sectors.
Longhai Technology takes pride in its domestic brand "Century Longhai" alongside our international strategic partner brand, the British "A Ba" series. Our comprehensive product spectrum ranges from heavy-duty diesel and gasoline engine oils, industrial gear oils, premium hydraulic fluids, special machinery oils, automotive urea solutions, eco-friendly coolants, and specialized motorcycle wet clutch oils. Crucially, all products are fully backed by PICC (People's Insurance Company of China) quality liability insurance, offering ultimate reliability to importers and distributors worldwide.
Guaranteed supply security, high blending precision, and adherence to rigorous quality standards.
Our facilities are fully certified under ISO-9001-2015 Quality Management, 14001 Environmental Management, and 18001 Health and Safety standard systems. Additionally, we hold Mercedes-Benz certification for automatic transmission fluid formulations, highlighting our elite status in international lubricant manufacturing.
Spanning 131 acres with an annual production capacity of 200,000 tons, our facilities feature intelligent fully automated blending lines. Weighing and feeding systems ensure a filling accuracy rate of 1‰-2‰ while boosting production speed by 20%-35% compared to semi-automated lines, minimizing lead times.
Our commitment to continuous formulation evolution is backed by over 5% of annual revenue reinvestment into R&D laboratories. Strategic cooperation with key universities and scientific institutions enables us to develop highly customizable lubricants optimized for severe extreme weather profiles and heavy work loads.
Empowering global distributors with advanced insights into shifting engine profiles and stringent legislative standards.
The global motorcycle lubricant market is experiencing structural changes driven by two primary forces: shifting environmental mandates (such as Euro 5 and Bharat Stage VI emissions standards) and the rising demand for lightweight, high-displacement commuter and performance motorcycles. In major two-wheeler growth regions—specifically Southeast Asia (Vietnam, Indonesia, Thailand, India) and Latin America (Brazil, Colombia)—lubricants must operate effectively across high ambient operating temperatures while keeping engines clean and preventing clutch slippage.
Modern motorcycle wet clutches are constructed with specialized friction papers, metals, and composite matrices. As a results-driven factory, we formulate our motorcycle line specifically to combat the common issues associated with modern formulations: friction coefficient decay, thermal oxidation breakdown, and viscosity shear degradation. Standard automotive oils contain heavy doses of friction modifiers (such as organic molybdenum) to increase fuel efficiency by making parts slippery. If used in a motorcycle, these modifiers coat the wet clutch plates, reducing friction and causing severe clutch slippage, gear engagement delay, and ultimately clutch plate burn-out.
Longhai Technology has established a dominant presence in China, serving 139 cities across 29 provinces, autonomous regions, and municipalities. Beyond domestic trade, our products are exported extensively to Southeast Asia, Central Asia, South America, and Eastern Europe, where our wet clutch formulation options are trusted by leading automotive networks and industrial fleets.
Compare standard parameters of our high-performance wet clutch formulations optimized to exceed JASO and API standards.
| Lubricant Viscosity / Grade | Base Oil Technology | JASO friction rating | Dynamic Friction Index (DFI) | Static Friction Index (SFI) | Key Application Profile |
|---|---|---|---|---|---|
| 10W-40 Synthetic Blend | Group II / Group III | JASO MA2 | 1.85 | 1.90 | High-stress urban commuter fleet delivery systems |
| 15W-50 Heavy Duty | Refined Mineral / Ester | JASO MA2 | 1.92 | 1.98 | Off-road enduro, air-cooled engines, hot climates |
| 5W-30 Fully Synthetic | PAO (Group IV) / Ester | JASO MA2 | 1.75 | 1.82 | Modern high-rpm performance engines, cold climates |
| 10W-30 Premium | Group III Synthetic | JASO MA1 / MA2 | 1.68 | 1.75 | Fuel-efficient OEM compliance for modern engines |
Our formulation strategy emphasizes the balance between wear protection and clutch friction dynamics. By maintaining a high Dynamic Friction Index (DFI), we ensure that power transmission from the engine crankshaft to the gearbox is instantaneous, eliminating power lag. Simultaneously, our high Static Friction Index (SFI) prevents slippage under high loads or torque spikes, protecting the clutch assembly from excessive heat generation.
From initial design to global delivery, we support custom packaging, labeling, and specialized chemical development.
Longhai Technology offers comprehensive private label, OEM, and ODM services to brand owners, distributor networks, and regional suppliers. We understand that local markets demand tailored viscosity ranges, specific packaging formats, and distinct marketing claims. Our services cover every phase of production, providing fully custom solutions:
Analyzing local specs, market placement, target base oil types, and packaging designs.
Lab blending of custom additive packages to meet API and JASO specifications.
Testing shear stability, wear limits, and wet clutch friction profiles.
Blending and filling via our automated 1‰ precision lines.
Fast ocean container dispatch from major Chinese ports with full documentation support.
Preparing wet clutch oil technology for electric transitions, hybrid architectures, and sustainability targets.
As the automotive sector looks to reduce emissions, motorcycle lubricants are facing new requirements. Viscosity trends are shifting downward, moving from traditional 20W-50 oils to more fluid 10W-30 and 5W-30 formulations. Lower viscosity reduces internal drag and improves fuel economy, but it also thins the oil film, putting components at risk. To keep wet clutches and gear trains protected, our technical team utilizes advanced synthetic base oils (PAOs and Esters) along with shear-stable viscosity index improvers (VIIs). This combination maintains an effective lubricating film at high operating temperatures while ensuring excellent low-temperature flow.
Additionally, the rise of hybrid drivetrains and electric two-wheelers introduces new friction requirements. In high-torque electric layouts where electric motors connect directly to wet clutch systems, lubricants must offer specific electrical properties and resist oxidation under high thermal loads. Shandong Longhai is actively developing the next generation of multi-fluid lubricants, preparing our partners to meet these emerging market demands.
Deep-dive answers to technical questions commonly faced by motorcycle oil importers, distributors, and workshop engineers.
A: The JASO T 903 standard divides motorcycle lubricants into MA (wet clutch suitable) and MB (clutch slip prone, low friction). The MA category is split into MA1 and MA2 based on friction properties. JASO MA2 delivers the highest friction coefficients, preventing wet clutch slippage in high-torque, heavy-duty applications. JASO MA1 is ideal for smaller engines or light-duty platforms with lower friction requirements.
A: Passenger car oils are formulated with friction modifiers (like organic molybdenum and soluble zinc packages) designed to reduce friction and improve fuel efficiency. When used in a motorcycle engine with a shared wet clutch, these friction modifiers attach to the clutch plates, reducing friction. This causes clutch slippage, heat buildup, and eventually leads to clutch plate glazing and transmission damage.
A: We blend our oils using premium Group III synthetic, PAO, or Ester base stocks, paired with high-performance, shear-stable polymer viscosity index improvers (VIIs). This ensures our lubricants resist mechanical shear, maintaining their specified viscosity even under heavy loads and high-rpm conditions.
A: Our standard MOQ for custom packaging and private labeling starts at 5,000 liters per viscosity grade. We also offer lower MOQs for standard formulation runs in bulk drums or wholesale container lots. Please contact our export team to discuss your specific requirements.
A: Every batch of raw materials and finished products undergoes testing in our precision laboratory before shipment. We provide full certificate analysis sheets (COA), safety data sheets (SDS), and hold ISO 9001, 14001, and 18001 certifications. Our products are also insured by the People's Insurance Company of China (PICC), offering peace of mind to our global partners.
A: Our heavy-duty 10W-40 and 15W-50 formulations feature high thermal-oxidative stability and elevated High-Temperature High-Shear (HTHS) viscosity. This maintains a strong lubricating film at high operating temperatures, protecting the engine and clutch in hot regions like Southeast Asia, the Middle East, and Latin America.
Explore our additional high-performance formulations for gasoline, diesel, and industrial applications.
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