86-20 Sportster, 97-02 M2, 97-98 S1, 97-99 S3, 99-02 X1, 03-10 XB
Required to accurately bore late-model aluminum cylinders. Simulates stress deformation of installed cylinder. Drilled for multiple applications up to a 4"-bore. The plates for Twin Cam 88 models also fit Screamin‘ Eagle big bore cylinders. Optional bolts are available for use with Evolution Sportster and Buell cylinders.