Procedures for the various applications are constantly being evaluated and improved. Removable liners are removed and cylinders are checked for fit before properly sized sleeves are installed. Once the sleeve is installed 2 cycle cylinder ports are blended to achieve efficient fuel flow.
Cylinders are then bored, less hone stock.
Ports are chamfered and top deck is machined. The cylinder is finally precision honed to the proper clearance fit to the appropriate piston. Any exhaust bridges are relieved. The cost for resleeving is considerably less than a new cylinder. Underneath this very thin coating or plating is aluminum which is an unacceptable surface for piston and ring contact.