Bore: Yes Stroke: No Actual Displacement 270.43cc

Engine Modifications Included:
Cylinder: OEM Cylinder bored and re-plated with Apticote 2000
Fuel Required: 91 octane - Options Available
Piston: CP Piston 13:1
Gaskets: Top end gaskets included.
Crankcase/Head: No modification required

This is a bored and plated OEM cylinder. We has done significant local testing on it and have not seen any failures as of yet.

However our gut says that the skirts may crack with a fast rider after significant run time, they have not failed for us yet but it is experience with OEM castings that makes us aprehensive.

If you want to make sure you have zero problems then you should go for the 278cc kit that has the forged liner installed in it. Those have been tested at the MX national level with no failures.

We offer this kit as an economical option and since we have not actually seen a failure yet we feel confident most rides will not have any troubles.