Question about 1981 Yamaha XJ 650
If the bike has been stored unused for more than a few months then the fuel will have gone off
As the higher esters of the petrol evaporates it becomes harder to ignite & will eventually just flood the cylinders & foul the plugs
Drain the fuel from the carb bowls by means of the drain plug located on the bottom of each bowl
Drain the fuel tank ( or mix maximum 50/50 with fresh, if its not too bad) & refill with fresh fuel
Then fit NEW plugs
With a freshly charged battery it will roar into life
But if the fuel has been left in the carbs for 5 - 6 months or more then it will have left resinous deposits in the carb jets,airways & float pivots
Strip & clean carbs paying particular attention to the jets - blow these & airways through with compressed air
Make sure to adjust the fuel level to std.
Posted on Aug 03, 2010
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Posted on Jan 02, 2017
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