Old Part Numbers: KU181Air compressor unloader valve, includes washer. If your unit is using too much oil or is not performing like it once did, then you may need to replace the valves. 

Old Part Numbers: K25For flywheel. Replace when rebuilding pump. Included in the KU Rebuild Kit.

Old Part Numbers: K133This air compressor pump ring kit includes rings for two pistons. Order two sets for v-twin air compressor pumps. Stagger rings and hone cylinders.  Replace if the pump is losing compression or using too much oil.Technical...

Old Part Numbers: L21K, 310-1001-01Replace this if worn or damaged. Torque to 120 in lbs. (Includes bearing shell inserts). NOTE: These new-style rods will install on old-style (non-bearing insert) pumps, as well as on the new-style pumps! For older...