| Cheers guys.
The rough running is as though the ECU has gone into 'limp home' or safety mode.
Massive bangs on overrun, very hard to accelerate, won't idle and flames out of the exhaust!
The battery is fit and I do keep it on a trickle charger, it has needed recharging after both of these rides.
It runs absolutely beautifully before I turn the lights on which makes me think the additional load is more than the battery can handle because the R/R does not seem to be contributing enough to charge the battery.
Is there a quick, visual way I can check the alternator nut? It was serviced 500 and 900 miles ago by 2 different dealers (big £'s) and given a clean bill of health each time.
Cheers!
Phil | 
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