Idle Speed

[unfazed]

Doesn't sound right to me - I'd expect idle speed to drop as it warms up, if anything.
Mine idles 1100-1200 cold, and about 900 warm (it's a tad low, I know), although there's no choke on mine. 1200-1300 is about right.

Thats because your S2 is fuel injected. The fuel injection bikes and cars have a fuel enrichment system like the manual choke on the carburettors which causes the fuel injected bike to idle faster when cold and slowly drop to the operating temperature idle speed as the engine warms up.
Most people if they use the choke on a carburettor engine turn it off when the engine can tick over without stalling before it reaches it operating temperature and it would not have the optium fuel air mixture for a cool engine and idle lower, then when it reaches the normal operating temperature the idle increases as the fuel air mixture is correct.
Technically you bike has a choke but it is controlled by the electronics using the temperature sensors