ETM RTR 420 Replacement Chain and Sprocket Kit: Complete Drivetrain Refresh in One Box
Chains and sprockets are some of the most important wear items on your bike. Neglecting them leads to poor performance, premature component wear and unexpected failures. This kit gives you a full 420 front sprocket, rear sprocket and chain in one order, sized for the ETM RTR XL, RTR Sport with a 14in rear wheel, and RTR with the Alpha Revolver Kit.
✅ BIKE FITMENT
- ETM RTR XL (96L)
- ETM RTR Sport with 14in rear wheel, Big Wheel kit or Supermoto (92L)
- ETM RTR with Alpha Revolver Kit and 14in rear wheel (92L)
Warning: Only works with RTR Sport / XL / Alpha motors. Does not work if your motor originally used #35 chain.
Features
- Complete 420 chain and sprocket refresh in one kit
- 420 63T rear sprocket and 420 8T front sprocket
- Chain length matched to your bike: 96L for the RTR XL or 92L for 14in rear wheel setups
- Regular chain and sprocket replacement helps prevent premature wear and unexpected failures
92L (RTR Sport 14in Rear Big Wheel or Supermoto)
Best for: ETM RTR Sport with a 14in rear wheel, Big Wheel kit or Supermoto setup, and ETM RTR with the Alpha Revolver Kit and 14in rear wheel.
What's Included:
- 420 63T rear sprocket
- 420 8T front sprocket
- 420 92L chain
Not included: Motor, wheels or sprocket bolts. Not for motors that originally used #35 chain.
96L (RTR XL)
Best for: ETM RTR XL owners refreshing the stock 420 drivetrain.
What's Included:
- 420 63T rear sprocket
- 420 8T front sprocket
- 420 96L chain
Not included: Motor, wheels or sprocket bolts. Not for motors that originally used #35 chain.
Frequently Asked Questions
Which chain length do I need?
Choose 96L for the ETM RTR XL. Choose 92L for the ETM RTR Sport with a 14in rear wheel, Big Wheel kit or Supermoto, or an RTR with the Alpha Revolver Kit and 14in rear wheel.
Will this work on my standard RTR with #35 chain?
No. This kit only works with RTR Sport / XL / Alpha motors. It does not work if your motor originally used #35 chain. For #35 setups, see the ETM RTR Extreme High Performance #35 RLV Chain.
What sprockets come in the kit?
Every kit includes a 420 63T rear sprocket and a 420 8T front sprocket, plus the chain for the length you select.
Can I buy the sprockets separately?
Yes. See ETM RTR 420 Sprockets and the ETM RTR 420 Replacement Motor Sprocket.
How often should I replace my chain and sprockets?
They are wear items. Inspect them regularly and replace them as a set when you see stretched chain, hooked or worn sprocket teeth, or the chain no longer holds proper adjustment.
