Vendor: Warp 9
Warp 9 Jack Shaft Sprocket
This part = 22 entries to win the ETM RTR
Description
The OEM jack shaft sprocket is soft metal that wears fast, especially if you're riding hard or running higher power. Warp 9 machines this one from hardened tool steel so it actually holds up, and offers it in two tooth counts so you can pick between stock gearing or a bump in top speed. Either way you're getting a part that outlasts what came on the bike.
Compatible With:
- Sur-Ron Light Bee
- Ventus One
- 79Bike Falcon
Features:
- Hardened tool steel construction — outlasts the soft OEM sprocket by a wide margin
- Black oxide coating resists corrosion and wear
- 14 tooth option is stock size — drop-in replacement for a worn OEM sprocket
- 15 tooth option raises top speed and extends range by lowering RPM, at the cost of some torque
- Precision-cut teeth for smooth chain engagement and reduced drivetrain wear
- Simple swap during routine drivetrain service — no special tools beyond what a chain job already needs
- Backed by riders who've burned through multiple soft OEM sprockets before switching
Whether you're just replacing a worn sprocket or regearing for more top-end, this is the one to reach for, and it'll outlast the stock part by a wide margin either way. Ships fast from the USA, straight to your door.
Frequently Asked Questions
What's the difference between the 14 tooth and 15 tooth options?
14 tooth matches the stock gearing, so it's the pick if you just want a durable factory-ratio replacement. 15 tooth lowers RPM at a given speed, which raises top speed and extends range, but costs you some acceleration and torque.
Is this a direct replacement for the stock jack shaft sprocket?
Yes, the 14 tooth version is sized to match the OEM part exactly, so it installs the same way — no other drivetrain changes required.
Will running the 15 tooth sprocket hurt my chain or other drivetrain parts?
No, it's designed to work with your existing chain and primary sprocket, but check your chain length after the swap since a tooth-count change can affect proper chain tension.
Bike fitment
Check fitment before you send it.