Ajs_Service_Bulletin_6-80_Cylinder_and_piston_dimensions_G2_G9_G12_G80

The AJS Service Bulletin 6-80 Cylinder and Piston Dimensions G2 G9 G12 G80 is a handy workshop reference for owners and mechanics looking up cylinder and piston dimensions for AJS G2, G9, G12 and G80 motorcycles. A factory service bulletin like this usually adds technical details to the main repair manual—the kind of information that helps with inspection, measurement and engine repair decisions. Dimensional guidance is useful when checking cylinder wear, verifying piston fit, or discussing machining requirements with an engine specialist.

For maintenance and overhaul work, use this AJS service bulletin together with the appropriate factory workshop manual. General repair documentation typically covers dismantling procedures, diagnostic checks, assembly methods and torque specifications, while parts references help confirm component numbers and model compatibility. A bulletin focused on dimensions is especially useful when comparing measured components against published specifications instead of relying on appearance alone. Confirm the model and applicable specifications before ordering replacement pistons or authorizing cylinder work. The PDF is available for download.