Starting a Jawa DT500 Four Valve

Starting a Jawa DT500 4 valve speedway bike. This bike was rotting away in storage for over 20 years, before being retrieved, cleaned and repaired. Note that a full inspection and assessment should be carried out before attempting to start any motorcycle having been stored for a long period of time, especially those which have had castor oils used in the lubrication system and/or racing methanol in the fuel system. Other than that, enjoy!