Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit

Tired of snapping belts every time you twist the throttle? The Heavy Hitter Primary Drive Conversion Kit is built for the WFO (Wide-Open Throttle) riders who refuse to let a broken belt ruin their ride. If you're pushing your bike to its limits, it's time to upgrade to a rock-solid chain drive that keeps up with your need for speed.

💡 Important Note: When installing, keep that chain loose! A tight chain is a sad chain. And a sad chain means a sad rider.

Why Choose Heavy Hitter?

We know that chain drives sacrifice some efficiency compared to belts—but they win in strength and durability. That’s why we designed the lightest primary chain drive kit on the market to minimize power loss while maximizing toughness. The 7075 T6 billet aluminum sprockets are hardened and anodized in sleek black, giving you high-performance durability without unnecessary weight.

🔥 Features:

✅ Precision-Machined 7075 T6 Billet Aluminum Sprockets – Lightweight & performance-driven.
✅ Gold 42-Link O-Ring Chain – Built for longevity with a master link for easy replacement.
✅ Bonus! 42-Link Non-Sealed Japanese Chain Included – Want max power transfer? Swap to this chain (just know it won’t last as long).
✅ OEM-Friendly Fitment – Maintains original gear ratio & motor alignment.
✅ Designed for Maximum Performance – Less weight, more strength, all gas, no breaks!

🚨 Heads Up! Aluminum sprockets wear out faster than steel, but if you’re looking for maximum performance, this kit is the way to go. If you're more about durability than shaving weight, steel setups might be more your speed.