Abstract: Cruise control apparatus for releasably holding a hand grip throttle at any given throttle position comprises a fixed position slip ring slidably riding around the outer periphery of a collar securely fastened to a rotatable hand grip throttle control. The slip ring comprises an open section with tabs extending from opposed ends of the slip ring facing the open section. A thumb actuated cam lever is employed to selectively squeeze the tabs of the slip ring together so as to clamp the slip ring on the periphery of the secured collar and hold the throttle in any desired position. The cam lever is easily released to effect immediate release of the cruise control whenever manual control is desired.