Description

This is a fully reconditioned 37A style bottom end.

New main bearings,  new Viton drive side seal, new big end and little end.

The drive side has been machined so a smaller primary sprocket can be fitted if required.

5 1/2″ rod length

Machined down timing side from a siba start style. You may need a new armature plate depending on what you currently have.

Can come with or without the armature plate, please select from the drop down.