Here's what I see happening as it's idling.
Cam chain turning.
Cam chain tensioner tensioning.
Cam shaft turning.
Cam sprocket turning.
Rockers rocking.
Valves moving.
Springs springing.
Spring retainers retaining.
Valve cotters holding.
Valve stem seals sealing.
Clutch wheel bearings turning.
Primary clutch shoe assembly turning.
Crankshaft turning.
Connecting rod reciprocating.
Crank pin bearing turning.
Washers centering.
Crank bearings turning.
Oil pump drive gear turning.
Piston poppin aint no stoppin now!
Rings sealing.
Piston pin reciprocating.
Clips holding.
Seal sealing.
Valve guides guiding.
Spark plug sparking.
Rotor turning.
Oil pump pumping.
Pump driven gear turning.
Starter cup turning.
Starter clutch clutching.