Aprilia RSV4 and Tuono V4 Dry Clutch Conversion Kit, KTT-3600 STM

Description

Aprilia RSV4 and Tuono V4 Dry Clutch Conversion Kit

The STM Aprilia RSV4 and Tuono V4 Dry Clutch Conversion Kit (Part# KTT-3600) is the ultimate racing conversion for the Aprilia V4. By transitioning your engine from a standard “wet” oil-bath system to a mechanical “dry” setup, you eliminate oil drag on the clutch assembly, leading to increased engine response, reduced power loss, and a significant reduction in rotational mass.

The EVO SBK Technology Advantage

STM Dry Clutch Conversion Kit represents the pinnacle of STM’s WorldSBK development. Unlike the factory wet clutch, this system uses a patented ramp-and-ball slipper mechanism that offers more predictable and reliable shifting during aggressive deceleration.

• 48-Tooth (48D) Design: The kit features a specific 48-tooth basket and disc pack, which distributes the mechanical load more evenly across the teeth to prevent the “notching” common in high-horsepower applications.
• Complete Mechanical Overhaul: This is a comprehensive conversion that includes the specialized clutch basket, 48D clutch plates, primary/secondary diaphragm springs, and all necessary mounting hardware.
• Aerospace Materials: Constructed from forged Ergal (7075 aluminum) and high-tensile steel, providing a lighter yet more durable alternative to the OEM assembly.
• Customizable Braking: You can fine-tune your engine braking by swapping the secondary diaphragm spring to adjust how much “slip” is allowed during high-speed corner entries.

📊 Technical Specifications

🛠️ Essential Installation Notes

Converting to a dry clutch is a professional-level modification that requires specific tools and attention to detail:

1. Required Tool: You must use the STM Slipper Clutch Tool (UTL-0030) to safely and accurately torque the assembly. Using standard tools can damage the delicate aluminum components.
2. Case Modification: Depending on your specific year and cover choice, some minor machining or modification to the outer clutch cover area may be necessary to ensure proper clearance for the dry assembly.
3. Torque Specs: The clutch cover mounting bolts should generally be torqued to 12Nm (8.85 ft-lbs). Always refer to your specific model’s shop manual for internal engine mount specs.

❓ FAQ: Performance Insights

Why choose a dry clutch for the Aprilia V4?

Beyond the iconic “rattle” of a racing machine, a dry clutch keeps friction debris out of your engine oil. This results in cleaner oil for your internal bearings and reduces the overall operating temperature of the engine oil.

Is it suitable for street riding?

While developed for the track, the EVO SBK system is very manageable on the street. It provides much smoother downshifts and eliminates the “rear-wheel hop” often felt on stock V4s when downshifting into first or second gear.

What is the maintenance interval?

For high-performance dry clutches, we recommend inspecting the disc pack thickness every 2,000–3,000 miles. Dry plates wear slightly faster than wet plates but are much easier to swap out without needing an oil change.

Installation instructions/KTT-3600