A remachined 350cc crankcase which has been machined to take the 500cc Crankshaft. and cylinder. The spigot has been machined, and new 5/16 CEI holes have been tapped for the cylinder head studs.
The timing side crankcase has been machined to take the timing side crank seal to help stop wet sumping.
Comes complete with tiiming cover, No cam gears or idler gears are included.
New studs and nuts have been used on crankcase halves