Cylinder Heads

The cylinder heads are semi permanent mold cast aluminum with powdered metal valve seat inserts and valve guides. Two 36.2 mm (1.425 in) intake valves and two 28 mm (1.102 in) exhaust valves are actuated by roller finger followers pivoting on a stationary hydraulic lash adjuster (SHLA). Separate intake and exhaust camshafts are supported by 5 bearings machined into the cylinder head with camshaft thrust taken by the first bearing (the left hand intake cam has an additional bearing to accommodate the water pump drive). The combustion chamber is roughly in the shape of a clover leaf with a nominal volume of 48.6 cu cm (2.965 cu in) and a centrally located spark plug.