I had a slight problem starting my Fazer (2004) on new years day, which ended with the bike at the mechanic and a hefty bill for jump stating the bike and changing the spark plugs. Since then the Fazer is misbehaving badly, the fuelling is not right, it is snatchy, it sounds like the bike runs on 3 cylinders, the fuel consumption is off the scales (14lit for 70 miles!!!) and lately it didn't hold tic over. I changed the battery, oil and oil filter and it looked that the issue was fixed but this morning the first symptoms started to appear again, the response feels snatchy again and when down sifting the dash shows that the rpm are 0. I have only done 60miles since the battery change.
Anybody has any idea to what is causing the problem? can a faulty rectifier be the cause? Am I seeing the last days of my engine  , mind that my beloved has 85000miles on the clock.    

Does anybody know if the 2004 FZ6S has an exup valve and where it is located?