|APE's Triumph Rocket III and Speed Triple Adjustable Cam Sprocket Installation
The single-dot timing mark indicates the mark used for the Intake (Inlet) cam. The double-dot mark is for the exhaust side. The two APE sprockets are designed to be interchangeable. See the illustrations below for clarification.
Timing marks on the Speed Triple (ACST1050) are similar:
The APE Exhaust sprocket's TWO DOTS will line up with thte Intake sprocket's ONE DOT.
(Photo courtesy of Race Comp - Australia.)