CX500 & CX650 Technical Forum Blog :

The CX series feature a crankshaft configuration aligned longitudinally with the axis of bike. The included angle of the CX is 80°, and the heads are twisted 22° so that the inlet tracts do not interfere with the rider's legs.

A camshaft nestles at the base of the V between the cylinders. Although Honda generally favors OHC engines, the cylinder head twist necessitated the use of stubby pushrods to operate the four overhead valves per cylinder, with a forked rocker arm acting off each pushrod.