Brand new big bore cylinder / barrel kit to fit:
AJS JSM 50.
This cylinder kit has been manufactured to replace the original top end on an AJS JSM 50 for the years and models shown above.
The kit includes:
- cylinder / barrel / jug
- head
- piston kit
- gaskets
To upgrade the original from 50cc to 70cc. 47mm bore.
To replace OEM: TBC (AM6 engine).