Drive Sprockets

[robolots]

Hello,
We are currently building an electronic speedway bike but have hit a slight snag with the drive sprocket.
Our rear sprockets can be 428 chain or 520 chain and we can't seem to find a sprocket in either 428 or 520 that will fit the motor.

It is 19mm with a 6mm keyway.

Does anyone know where we can get some?

 

[Upperfoot]

Hello,
We are currently building an electronic speedway bike but have hit a slight snag with the drive sprocket.
Our rear sprockets can be 428 chain or 520 chain and we can't seem to find a sprocket in either 428 or 520 that will fit the motor.

It is 19mm with a 6mm keyway.

Does anyone know where we can get some?

Found this potentially? It says the key is 7x6mm but you may be able to hand file it - https://evea-kartmasters.fr/en/by-chain-drive/2089-sprocket-chain-428er-shaft-19mm.html