Complete 420 Chain Drive Kit with 5/8" Bore Clutch This comprehensive drivetrain kit includes 1x 60-tooth rear sprocket, 1x heavy-duty 420 chain (106 links), and 1x 10-tooth clutch with 5/8" bore and 5/32" keyway. Engineered specifically for Predator 79cc, 60cc engines and compatible with smaller mini bikes, go-karts, and pocket bikes with 5/8" diameter engine output shafts.
60T Sprocket for Maximum Torque and Climbing Power Upgraded from standard 50-tooth to performance 60-tooth sprocket delivers 20% more torque and significantly improved hill-climbing capability. Perfect for small displacement engines that need extra low-end power. The increased gear ratio compensates for smaller engine displacement, providing better acceleration and pulling power for riders up to 150 lbs.
Automotive-Grade Alloy Steel Construction Crafted from high-strength alloy steel with precision heat treatment for superior wear resistance. The sprocket features corrosion-resistant coating to withstand harsh weather and muddy conditions. Heavy-duty 420 chain rated at 3,500+ lbs breaking strength ensures reliable power transfer even on smaller engines. Built to outlast OEM components by 50% or more.
5/8" Bore Designed for GMB100 Industrial-grade 10-tooth clutch specifically designed for 5/8" (16mm) engine output shafts with 5/32" keyway. Perfect fit for GMB100 99cc Mini Bike. Features heavy-duty springs and reinforced construction optimized for smaller displacement engines while maintaining durability for aggressive riding.
Direct Bolt-On Fitment with Complete Hardware Easy installation with no modifications required - direct replacement for stock components. Fits standard 6-bolt pattern for rear sprocket and includes all mounting hardware. Compatible with most go-kart and mini bike rear wheel hubs. Chain pre-measured to perfect length for 60T configuration. Professional results in under 30 minutes with basic hand tools.