Valve control means

Valve control means for an internal combustion engine comprising valve means, cam means comprising a rotatable camshaft having a first cam member and a second cam member having a different profile from said first cam member, means for transmitting reciprocating movement to the valve means from said cam means, said transmitting means comprising a first cam follower member in engagement with said valve means and a second cam follower member movable relative to said first cam follower member, and locking means to enable said follower members to be linked so as to move together, wherein

• when the follower members are not so linked the valve means is controlled by the first cam follower member in engagement with and following the profile of the first cam member and when the follower members are linked the valve means is controlled by the second cam follower member in engagement with the following the profile of the second cam member and wherein
• the second cam follower member has a bore therethrough and the first cam follower member is in the form of an inner member located within the bore, said first cam second cam follower member when the cam follower members are not linked to move together.