Your cases and cylinder are dry fit several times before final
assembly.  Your cases are not just merely sanded to look pretty,
but are purpose ground to flow more    ie..pretty isn't
necessarily FAST !!!
Opening up of a cylinder to flow the maximum amount of atomized
fuel. The port openings at the piston are reshaped, height and angles
changed to create desired flow patterns.
New crankshafts installed and centerd to the cylinder with new class
3, class 4 or ceramic bearings.  Ports are enlarged and matched to
cylinder along with the base gasket.
For ALL Your Porting Needs Contact:
Tommy Alley @ (469)348-4988