Beefed Up 420 Chain Kit With 132 Links And 45 Tooth Rear Sprocket Plus 12 Tooth Front Sprocket With Seventeen Millimeter Bore Fit Chinese 50cc To 170cc Pit Dirt Bike Off Road Motorbike

Beefed-Up 420 Chain Kit: 132-Links & 45T/12T Sprockets
✔️ Pack: 1 kit; 132-link chain; 45T rear; 12T front; 17mm bore

Our beefed-up 420 chain kit is designed for rugged off-road riding on Chinese 50cc to 170cc pit bikes, SSR clones, ATVs, and go-karts. It pairs a heavy-duty chain with matched sprockets for durable, reliable performance in tough terrain.

✅ 420 chain, 132 links, includes chain breaker
✅ 45T rear drive sprocket, 12T front sprocket, 17mm bore
✅ Mounting hole distance 92 mm (3.62"), center bore 76 mm (2.99")
✅ Fits Chinese 50-170cc pit dirt bikes, SSR and similar go-kart/ ATV platforms
✅ High-strength components built for off-road use

💡 What is a chain and sprocket kit used for in a small displacement dirt bike setup?

This handy upgrade helps you tailor gearing for better launching and drivetrain life.

- improves drive efficiency and power transfer between engine and rear wheel
- allows dialing in final drive ratio for specific cc range (50-170cc)
- reduces chain wear when used with correct tension and length
- simple bolt-on upgrade with included chain breaker