Almost all since 2003 have a belt drive system.....execept if you actually look at the specs on the harly-davidson.com site, almost all are "chain" drive... you can modify them to be belt driven aftermarket, but most all are chain stock.
You could find a Harley Davidson key chain at a Harley Davidson store. You could also find a Harley Davidson key chain at any website that would sell stuff online.
Chain too tight
Get the repair manual, follow the steps
No Harley Sportster has ever had a cam chain. The camshafts are gear driven, directly off the crank. No tension adjustment required.
The primary oil does three things. Lube the clutch. Lube the primary chain . And cool the stator. If Harley thought Dextron would do this, they would have recommended the use of it. Keep your Harley a Harley.
Yes, technically overdrives do exist in motorcycles (Output of transmission faster than input). It is moot point for motorcycles however. Chain driven motorcycles can be re-geared simply by changing the rear chain sprocket to a smaller one.
The service manual recommends to have it checked every 10,000 miles.
Left side of engine commonly called the "primary" chain case side of the engine
Its all to do with the design of the gearbox and mounting of the back brake. Royal Enfield still chain on the right and Harley Davidson run belts on either side.
http://www.hdtalking.com/transmission_clutch_and_primary/3173-how_to_adjust_primary_chain_video.html Try this website it is a video that features the 2003 road king, chain tighten and fluid change
No it is driven by a drive shaft. The cam is driven by a chain.