A degree wheel was also used to check marks and to set up the crankcase breather. Since we were using the new breather with the elongated oil evacuation hole, the breather timing was set to open at 17 degrees after T.D.C. and closing at 82 after B.D.C. JIMS lifter blocks and lifters were installed with a clearance .001 between lifter and housing.

    The 4-valve heads were cleaned up by relieving the area behind the valve in the combustion chamber and then rechecked to make sure they were the same cubic centimeters The intake runners were ported, matched to the heads and rough casting removed. It should be noted that no extra material was removed or polishing done to the intake.

     The cylinder head valve seats were cut with seven angles using a Sunnen VGS with cutters supplied from Sunnen. Valves were updated to stainless with a hardness of 55 on the C Rockwell Scale. The valves were coated on the stem with a dry-film, thermal-dispersant coating; the face of the valves and the neck of the exhaust valve were coated with ceramic. The combustion chamber is ceramic coated. The heads were flowed on a SuperFlow SF300/600 using a single-spigot intake manifold plenum and installed using the Harley-Davidson pattern.

    The rocker boxes were torqued and a set of adjustable pushrods used to determine the length of the pushrod we would use. A set of chrome-moly, one-piece pushrods were then made and their lengths recorded for future reference.

    The intake plenum intake port was modified to accept a bolt and eliminate the need for a nut. A 42-mm Mikuni carburetor was installed with the idle setting adjuster modified by shortening the brass flange and the spring to get a slightly higher idle setting.

    A Dyna 20001 Programmable Digital Ignition System was chosen because it has a timing mode for 25 degrees.

    All parts were pre-lubed during assembly. The engine was put on the test stand and the oil pump bled, timing checked, and it fired right away.

    I have over 10,000 miles on this motor, and the only thing I have done to it is change the oil, and the only problems that I have is keeping the front wheel on the ground and wearing out the rear tire.

The heads are tested on a elaborate flowbench.

The heads are carefully torqued,

 using a torque wrench.

The 96 roars to life for the first time,

 and get's a break-in.