DELKRON ENGINE CASE ASSEMBLY-STANDARD BORE. FITS EVOLUTION BIG TWIN MODELS 1984-91. INCLUDES INSTALLED TIMKEN BEARING CYLINDER STUDS AND PINION RACE WHICH IS ALSO LINE LAPPED TO STANDARD SIZE.
Source: Custom Chrome
Computer designed and CNC-machined cases are permanent mold cast of 356-T6 aluminum with 1/2"-thick wall sections, have cast-in gray iron inserts and use standard fasteners. A removable high-performance sump plate permits inspection of the bottom end, and is finned for additional cooling. Permanent mold casting is superior to sand casting providing more exact duplication, closer tolerances, better mold adhesion and precision race insert location. Other innovations include: " Extra rib on left front motor mount to prevent ear breakage " Oversized front and rear cylinder pad areas " Alternator stator plug moved outboard to eliminate thin area near left case race. Nylon set screw holds plug in place " Relocated primary O-ring groove provides positive seal and eliminates weak register lip " Rerouted oil passages eliminate thin areas around cylinder and lifter blocks " Roll-formed threads eliminate tap galling and ensure accurate thread size " Work on forward or mid-shift models " All cases complete with torque specs and instructions.