04-05-12, 11:03 AM
Maybe dodgy fuel. If the spark plugs have been in since new might be worth changing them-the colour of the originals may give you a clue -if sooty black too rich-check air filter. You say bike starts from cold ok so a rich mixture when engine warm could cause difficult starting. Just steadily working through the fuel system from tank( tap/breather pipe/fuel filter/hoses) to carbs. Also check the float bowls-there is a drain screw-you may have collected sediment or water over time. Its probably something simple.Let us know how you get on :rolleyes