{"product_id":"viper-3-5-clutch-spring-silver-090-wire-all-applications","title":"Viper 3.5\" Clutch Spring - Silver .090\" Wire - All Applications","description":"\u003cp\u003eAchieving optimal clutch lock-up requires precision-engineered kart parts, and the Viper Silver .090\" Wire Clutch Spring (SKU: FCDC-SP90S) delivers the exact tension necessary for explosive corner exits. Designed by Brian Barnes for the Surge line and compatible with Viper and most 3.5\" clutches, this spring provides the perfect balance of engagement and slip. Whether you are running a high-horsepower modified engine or a standard clone, maintaining consistent clutch engagement is critical for maximizing corner exit speed and straightaway momentum.\u003c\/p\u003e\u003ch2\u003eSeamless Integration with Go Kart Axles and Drivetrains\u003c\/h2\u003e\u003cp\u003eYour clutch is the vital link between engine power and your \u003cstrong\u003ego kart axles\u003c\/strong\u003e. If your clutch springs are fatigued or improperly tensioned, you lose valuable power transfer, resulting in sluggish acceleration and inconsistent lap times. The .090\" wire thickness of this silver Viper spring offers a medium-stiff engagement profile, making it highly versatile across various track conditions and engine packages. Unlike a heavy-duty \u003cstrong\u003ego kart torque converter\u003c\/strong\u003e setup that relies on belt friction, a disc clutch demands precise spring tension to lock up at the optimal RPM. This silver spring ensures your clutch shoes engage with authority, preventing excessive heat buildup and premature wear on your friction discs.\u003c\/p\u003e\u003ch2\u003eUnmatched Durability Alongside Your Brake Cylinder\u003c\/h2\u003e\u003cp\u003eJust as you rely on a responsive \u003cstrong\u003ebrake cylinder\u003c\/strong\u003e to dive deep into the corners, you need a clutch spring that snaps back into position the moment you lift off the throttle. The high-tensile steel construction of the Viper .090\" spring resists heat fade and mechanical fatigue, ensuring your engagement RPM remains identical from the green flag to the checkered. The distinct silver hue isn't just for aesthetics; it allows mechanics and drivers to perform rapid visual inspections in the pits, ensuring the correct spring rate is installed before hitting the grid.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e.090\" Wire Diameter:\u003c\/strong\u003e Provides a versatile, medium-stiff tension profile suitable for a wide range of engine classes and track layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal 3.5\" Compatibility:\u003c\/strong\u003e Engineered to fit Viper, Surge, and virtually all standard 3.5-inch disc clutches on the market.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Steel Construction:\u003c\/strong\u003e Resists heat cycling and mechanical fatigue to maintain a consistent engagement RPM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistinct Silver Color-Coding:\u003c\/strong\u003e Enables rapid visual identification in the pits, eliminating setup guesswork during frantic tuning sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Power Transfer:\u003c\/strong\u003e Ensures crisp, predictable clutch lock-up to maximize acceleration and reduce friction disc wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrian Barnes Design:\u003c\/strong\u003e Developed by an industry expert to deliver championship-winning reliability and performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll-Application Versatility:\u003c\/strong\u003e Ideal for both sprint racing and endurance events where consistent clutch performance is mandatory.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the .090\" wire diameter affect my kart's performance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The .090\" wire diameter provides a medium-stiff tension profile. This is designed to offer a balance between engagement and slip, helping your clutch lock up effectively for better acceleration out of corners without causing excessive heat buildup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this spring compatible with all 3.5\" clutches?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this spring is engineered for universal compatibility with Viper, Surge, and most standard 3.5-inch disc clutches used in karting applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the silver color-coding important?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The distinct silver finish allows for rapid visual identification in the pits. This helps mechanics and drivers quickly verify that the correct spring rate is installed before hitting the track, saving time during tuning sessions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: When should I replace my clutch springs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e You should inspect your springs if you notice sluggish acceleration, inconsistent lap times, or if the clutch engagement RPM begins to drift. If the springs show signs of mechanical fatigue or heat fade, replacing them with a fresh set is essential for consistent power transfer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use these springs for both sprint and endurance racing?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Absolutely. The high-tensile steel construction is designed to resist heat cycling and mechanical fatigue, making these springs reliable for both short sprint races and longer endurance events.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/viper-clutch-pressure-plate-fcdc-pp\"\u003eHigh-Performance Viper Clutch Pressure Plate for Superior Engagement\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/viper-clutch-floater-plate-optional-090-fcdc-fp090\"\u003eOptional Viper Clutch Floater Plate .090 Inch for Custom Builds\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/viper-clutch-inner-thrust-bearing-fcdc-itb\"\u003eViper Inner Thrust Bearing for Clutch Durability\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/viper-clutch-drive-hub-3-disc-fcdc-dh3\"\u003eReinforced Viper Clutch Drive Hub for Triple-Disc Applications\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/viper-clutch-lever-support-fcdc-ls\"\u003eSilver Aluminum Viper Clutch Lever Support for Small Pin Levers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SwiftKarting","offers":[{"title":"Default Title","offer_id":48157967384835,"sku":"FCDC-SP90S","price":5.93,"currency_code":"USD","in_stock":true}],"url":"https:\/\/phishstonesproducts.myshopify.com\/products\/viper-3-5-clutch-spring-silver-090-wire-all-applications","provider":"PhishStones Products","version":"1.0","type":"link"}