Clutch Spring Kit - TRW - MEF129-5
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Product Information
Full details
The TRW Lucas Clutch Spring Kit MEF129-5 is an essential upgrade for motorcycle enthusiasts and mechanics looking to restore or improve clutch performance. Designed for riders who experience clutch slippage under load, these springs offer a 10% increase in hardness over stock components to ensure firm engagement, though this may result in a slightly firmer clutch lever pull compared to standard factory springs.
All features
| Model Part Number | MEF129-5 |
|---|---|
| Brand | TRW |
Extended Product Information
FAQs
How many springs are included in the MEF129-5 kit?
The kit includes 5 pieces, providing a full replacement set.
Will these springs fit my specific motorcycle?
The MEF129-5 is compatible with various models from Honda, Kawasaki, and Triumph. Please verify your specific bike model against the MPN compatibility list before installation.
Do I need special tools for installation?
You will need standard metric hand tools and a torque wrench, along with a new clutch cover gasket specific to your bike.
Why are these springs harder than the original ones?
They are designed with 10% more hardness to provide better engagement and prevent power loss caused by clutch slippage during high-torque scenarios.
Can I use these springs for daily commuting?
Yes, they are suitable for daily use, though you may notice the clutch lever feels slightly heavier in stop-and-go traffic.
Troubleshooting
Clutch lever feels significantly stiffer than expected
This is a normal characteristic of the 10% stiffer springs; ensure your clutch cable is lubricated and properly routed to minimize added drag.
Clutch still slips after installation
Verify that your clutch plates are not worn beyond their service limit. Stiffer springs cannot compensate for severely worn friction discs.
Pros and Cons
Pros
- Significantly reduces clutch slippage
- Improves power transfer from engine to transmission
- High-grade material construction for long-term consistency
- Direct fit for multiple major motorcycle brands
Cons
- Requires more lever pressure during operation
- Not suitable for riders preferring a very light clutch pull
- May require engine cover gasket replacement during installation
Setup, Compatibility & Care
Installation of the MEF129-5 kit typically requires removing the clutch cover of your motorcycle. It is recommended to perform this maintenance when the engine is cool. Ensure you have the manufacturer's specified clutch cover gasket on hand, as original gaskets often tear during removal. When installing the springs, tighten the clutch pressure plate bolts in a cross-pattern to ensure even tension across the assembly. Always refer to your motorcycle’s service manual for specific torque specifications for the pressure plate bolts to prevent stripping the threads or damaging the clutch basket.