FRT Race Clutch Cover for Vespa Largeframe – Fully Pre-assembled
The FRT Race clutch cover is a high-quality, fully pre-assembled solution for Vespa Largeframe engines from the early 1960s through the PX/Cosa series. It combines a robust aluminum housing with a precision rack-and-pinion mechanism, a double-bearing release system, and a spacious interior with a diameter of 122 mm.
The design aims to provide precise, smooth, and durable clutch operation—particularly beneficial for high-performance and sport-tuned engines with increased clutch forces.
FRT Race
122 mm inner diameter
Rack-and-pinion mechanism
double-bearing
Viton seals
Pre-assembled
Key advantages
Precise clutch actuation: rack-and-pinion mechanism instead of a simple lever transmission
Double-bearing design: more stable guidance of the release mechanism
Ø122 mm interior space: plenty of room for large-frame clutches
High-quality sealing: Viton O-rings and double-lip shaft seal
Fully equipped: pressure plate, 2-mm extension, bracket, adjuster, spring, and cable clamp included
Pre-assembled: the cover is delivered fully assembled
FRT Race – Technical Specifications
The “Race” designation identifies this FRT version. According to the manufacturer’s specifications, it features G-AlSi7 aluminum, a rack-and-pinion mechanism, dual roller bearings, Viton seals, and a Ø122-mm interior. No further technical differences from the Road version are listed in the available data.
Rack-and-pinion mechanism for precise actuation
Instead of a purely direct lever movement, the FRT Race clutch cover uses a rack-and-pinion mechanism. This ensures that the movement of the clutch arm is transmitted to the release system in a controlled manner.
Especially for clutches with high spring force, a mechanism that is as play-free and smoothly guided as possible is important. The FRT design aims for even force transmission and precise clutch modulation.
Double-Bearing Clutch Arm
The release mechanism is guided by two roller bearings or needle roller bearings. This provides more stable guidance for the clutch arm and reduces lateral tilting.
Advantages of the double-bearing design
Reduced tilting of the release mechanism
More uniform guidance under high loads
Less friction at the bearing points
Particularly useful with powerful clutch springs
Case-hardened and ground release shaft
The shaft of the release system is case-hardened and ground. This creates a hard, wear-resistant surface while ensuring a precise bearing surface.
This finish is particularly advantageous where the shaft operates continuously under varying loads at the bearing seats.
122 mm inner diameter for large-frame clutches
The inner diameter of the cover is 122 mm. This gives the FRT Race ample installation space for standard Vespa Largeframe clutch designs.
Sufficient free play is particularly important for modern reinforced clutches. However, before final assembly, you should always check whether the clutch actually being used runs freely over its entire actuation stroke.
Viton O-rings and double-lip shaft seal
For sealing, FRT relies on Viton O-rings and a double-lip shaft seal. Viton is characterized by high resistance to oil, fuel vapors, and temperature, making it very well-suited for use in the engine compartment.
The double-lip design of the shaft seal improves sealing of the moving shaft compared to a single sealing lip.
Pressure plate with central bore and 2-mm extension
The system includes a clutch pressure plate with a central bore. A 2-mm extension is also included.
This allows the position of the release system to be adjusted to different clutch assemblies.
Dedicated Mounting Bracket and Adjustment Screw
FRT supplies a mounting bracket specifically designed for the cover, complete with an adjustment screw. This ensures that the cable guide is precisely aligned with the clutch arm.
The system is complemented by a dedicated cable clamp and a galvanized return spring for the clutch lever.
Fully pre-assembled
Delivered ready for installation
The FRT Race clutch cover is delivered fully pre-assembled. The clutch arm, bearings, seals, and associated components are already installed.
Compatible with Vespa Largeframe 1962–2016
The FRT Race is designed for a wide range of classic Vespa Largeframe models, including:
Vespa PX80, PX125, PX150, PX200
Vespa T5 125
Vespa Cosa
Vespa Rally
Vespa Sprint
Vespa VNB4T, VNB5T, VNB6T
Vespa VBB2T
Vespa VNC1T
Vespa VLA1T
Vespa VBC1T
Vespa VNL2T and VNL3T
The key factors are the large-frame engine design and the corresponding clutch cover geometry. For early or already modified engines, the existing design should be compared with the FRT cover before ordering.
Technical Specifications
| Manufacturer | FRT |
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| Series | Race |
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| Part | Complete Clutch Cover |
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| Vehicle range | Vespa Largeframe, approx. 1962–2016 |
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| Material | G-AlSi7 aluminum, heat-treated |
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| Color | Silver |
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| Actuation | Rack-and-pinion mechanism |
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| Disengagement shaft | Case-hardened and ground |
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| Bearing | Double roller/needle roller bearings |
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| Inner diameter | 122 mm |
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| O-rings | Viton |
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| Shaft seal | Double-lip |
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| Pressure piece | With central bore |
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| Accessory | 2-mm extension for pressure piece |
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| Cable guide | Special bracket and adjustment screw |
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| Return spring | Steel, galvanized |
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| Cable clamp | FRT-specific |
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| Delivery condition | Fully pre-assembled |
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Scope of delivery
FRT Race aluminum clutch cover
Clutch arm / release mechanism
Double roller/needle roller bearings
Viton O-rings
Double-lip shaft seal
Pressure plate with central bore
2-mm extension for the pressure plate
Special mounting bracket and adjustment screw
Galvanized return spring
Special cable clamp
Installation Instructions
Check the coupling and cover for full freedom of movement before final assembly
Route the coupling cable neatly and without tension to the adjustment screw
Select the pressure piece or 2-mm extension that matches the coupling configuration being used
Adjust the clutch play correctly after installation
Check the operation and cable play after the first few rides
Conclusion
The FRT Race clutch cover is a high-quality, complete solution for Vespa large-frame engines. Its rack-and-pinion mechanism, dual bearings, hardened release shaft, and high-quality Viton seals create a precise and durable foundation for modern clutch setups.
Thanks to its large interior diameter of Ø122 mm, the optimized cable routing, and the fact that it comes fully pre-assembled, the cover is particularly well-suited for high-performance and sport-tuned large-frame engines that require clean and reliable clutch operation.
FAQs about the FRT Race Clutch Cover
The movement of the clutch lever is transmitted to the release mechanism via a rack-and-pinion mechanism. This allows for precise and smooth operation.
The cover has an inner diameter of 122 mm and is designed for Vespa large-frame clutches. For custom or tuned clutches, clearance should be checked before final installation.
Viton is resistant to high temperatures and various media, making it ideal for seals in the oil- and heat-loaded engine environment.
The 2-mm extension complements the pressure plate and allows the release geometry to be adjusted to the specific clutch assembly being used.
Yes. According to FRT, the cover is shipped fully assembled.
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