JIMSÂ® now offers Roller Rocker Arms in a 1.745 rocker ratio JIMSÂ® 1.745 ratio rockers are designed to work with JIMSÂ® other valve train components and function with JIMSÂ® total valve train system. Cast from 4340 chromoly and then heat treated for maximum strength. Designed to be used with JIMSÂ® No.17611-83 Rocker Arm Shafts or equivalent. For a custom valve train set up where a super high lift is required, using a small lift cam, this 1.745 ratio rocker allows the engine builder to achieve more lift at the valve. for All Buell models ( not 1125 ), and Xl engines
NOTE: These rockers are not a bolt-in roller rocker. They are designed to be installed by the most advanced engine builder. Modification to the heads and rocker boxes may be necessary to install these rockers.