Nor-Am NA108 Green Clutch Spring - 3700 RPM Star / 2550 RPM MiniCup Stall - Racing Kart Class
$8.32 USD
Sale price
$8.32 USD
Regular price
Dialing in your clutch engagement is the most critical tuning adjustment you can make on a racing kart, dictating exactly how power transfers from the crank to the asphalt. The Nor-Am NA108 Green Spring is engineered specifically for stall specialists who demand absolute reliability under extreme heat and relentless friction. By holding back engagement until the engine reaches peak torque, this spring unleashes power in a violent, controlled torrent. Whether you are running a high-output kart racing motor or a standard clone, maintaining consistent spring tension lap after lap is what separates podium finishers from the rest of the pack.
Unmatched Durability for Your Kart Racing Motor
Clutch springs endure brutal thermal loads, but the NA108 Green Spring thrives in the redline's fire. Manufactured from high-tensile, heat-treated steel alloy, it resists the dreaded spring sag that plagues inferior components. This means your engagement RPM remains dead-on throughout a grueling enduro sprint or a rapid-fire drag launch. If you've been browsing for a new go kart motor for sale because your current setup feels sluggish off the line, the culprit might just be a fatigued clutch spring. Upgrading to the NA108 ensures your engine's power crests exactly when you need it, maximizing acceleration out of tight hairpins without compromising the integrity of your drive-line.
Consistent Launches and Better Traction
Power is useless if you can't put it to the ground. By delaying engagement to a precise 3700 RPM on Nor-Am Star clutches (and 2550 RPM on MiniCup setups), the NA108 allows the engine to spool up into its optimal powerband before the shoes bite the drum. This precise lock-up prevents bogging and ensures that your go kart tires receive a smooth, predictable surge of rotational force. For racers searching for go karts for sale near me or building a custom chassis from the ground up, integrating a reliable, heat-resistant clutch spring like the NA108 is a fundamental step in building a bulletproof drivetrain.
- Precise Engagement: Delivers a dead-on 3700 RPM stall on Star clutches and 2550 RPM on MiniCup setups.
- Heat-Treated Alloy: Resists thermal fatigue and spring sag during extreme endurance races.
- Consistent Tension: Maintains peak load integrity, ensuring your launch RPM never drifts.
- Optimized Power Transfer: Allows the engine to reach peak torque before clutch shoes engage the drum.
- Visual Identification: Bright green marker streamlines pit-box inventory and quick trackside tuning.
- Universal Reliability: Built to handle the aggressive vibrations of a high-revving kart racing motor.
- Drag-Style Burst Capability: Perfect for aggressive standing starts and tight corner exits.
Frequently Asked Questions
Q: How do I know if the NA108 Green Spring is the right choice for my kart?
A: The NA108 Green Spring is designed for racers who need a higher stall speed to reach their engine's peak torque before engagement. If you are experiencing "bogging" off the line or out of tight corners, this spring helps the engine spool up to 3700 RPM (Star) or 2550 RPM (MiniCup) before the clutch bites, providing a more aggressive launch.
Q: Can I mix and match different color springs in my Nor-Am clutch?
A: It is highly recommended to use a matching set of springs across all clutch shoes. Mixing spring tensions will cause uneven engagement, leading to premature shoe wear, vibration, and inconsistent handling on the track.
Q: How often should I replace my clutch springs?
A: Clutch springs are wear items subject to extreme thermal stress. You should inspect them for "sag" or loss of tension if you notice your engagement RPM dropping over time. If you race competitively, replace them periodically to ensure your launch RPM remains consistent throughout the season.
Q: Is the NA108 Green Spring compatible with both Star and MiniCup clutches?
A: Yes, this spring is versatile and fits both systems, though it provides different stall characteristics depending on the clutch type: 3700 RPM for Star clutches and 2550 RPM for MiniCup setups.