• Heavy rate for reduced slip in boosted applications.
• Durable black finish resists wear from frequent adjustments.
• Individual sale enables progressive spring combinations.
• Engineered for even compression, avoiding coil bind.

Feel the surge in acceleration as it organizes firm response, helping you blast out of hairpins. Versatile for wet or dry tracks, it maintains consistency. A favorite among tuners for dialing in pro-level feel. SKU: SMC-4059 – the grip behind your glory.

Frequently Asked Questions

Q: Why should I choose the Black Vortex spring over other colors?

A: The Black Vortex spring is a heavy-rate spring designed for high-output karts. It provides increased pressure to reduce clutch slip, making it ideal for engines that require a firmer, more authoritative engagement to prevent power loss.

Q: Can I mix and match these springs with other colors?

A: Yes. Because these are sold individually, many tuners use a combination of different spring rates to dial in a specific engagement RPM and "feel" that suits their driving style and track conditions.

Q: How do I know if my clutch needs a heavier spring?

A: If you notice your kart hesitating or experiencing excessive clutch slip during acceleration out of corners, a heavier spring like the Black Vortex can help the clutch engage more firmly and transfer power to the wheels more efficiently.

Q: Are these springs compatible with all SMC clutches?

A: These are designed for use within the SMC Vortex system. Always ensure your specific clutch model supports the use of these springs and check for proper clearance to avoid coil bind during full compression.

Related Products From Vendor

• SMC Vortex Two-Disk Clutch REV3 Style for Superior Kart Engagement
• SMC Vortex Two-Disk Clutch Rebuild Kit - SMC-5072 - 4-Cycle Racing
• SMC 12-Tab Clutch Disk - High-Grip Friction - 4-Cycle Racing
• Vortex Gold Spring for Premium Kart Clutch Adjustability
• Vortex Silver Spring for Tunable Kart Clutch Tension