NATURE OF RELEASE: Cylinder head interchangeability
MODELS AFFECTED: All 750 c.c. models
EXPLANATION: Introduction of the. current 32mm carburetter version of the standard Commando engine unit, replacing the previous 'Combat' specification (w.e.f. engine number 211110) has necessitated the introduction of two new cylinder heads which are listed below.

Interchangeability can be effected as shown, utilising the available range of cylinder head gaskets, in conjunction with the deletion of the cylinder base gasket where indicated.

Douglas Kane Loctite "Instant Plastic Gasket" is recommended for the cylinder base joint where NM24249 is deleted. Use H.M.P. grease for both copper cylinder head gasket joints.

September 1972

Norton Villiers Canada Limited