Jims Machine JM-5835 On Bike Valve Spring Compressor for all Milwaukee-Eight Touring 17-Up/Softail 18-UpDescription for JIMS Valve Spring Compression Tool 5835 Eliminates the need to remove the cylinder head from the engine when changing valve springs or replacing leaking valve seals Simply remove the rocker box covers and rockers arms to install compressor on the rocker arm shaft Once the cylinder is filled with compressed air, easily rotate the tool and compress the top collar of the valve spring, exposing the keepers to remove the top collar, valve