JIMS® Big Twin Case Lap Tool

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This tool allows the engine builder to achieve the best of both worlds: removal of more material in less time with greater accuracy than a conventional lap. Both ends of the lap are supported in precisely the same centerline as the flywheel assembly. Use with conventional hand crank or with this extremely rigid arrangement it is possible to power the lap with a low speed drill motor without fear of chatter in the lapped bearing race. All wear surfaces are hardened and ground tool steel for a lifetime of service. Fits 1958-1999 Single-Cam Big Twin