GSX750f running lumpy

[Wil]

My bike has started behaving oddly in the last day. It was fine on the way to work yesterday, but on the way home, after I left the soggy M5, it was sounding a bit like a tumble drier and a bit like it was running on 3 cylinders. Jerky at low revs, but riding reasonably smooth at higher rpm. I felt the downpipes after riding to work this morning and they were all hot, although the far left one seemed a little cooler than the others. Hard to tell without burning my hand, it was still quite hot!

I initially thought it might be water shorting an HT lead or something, but it was bone dry on the way in today so that's that theory out. Any ideas?
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'07 Triumph Speed Four

Aw look, a baby driving a car. And look, there's a dog driving a bus!

[Grav]

A plug may have fouled when it dropped to 3 cylinders so try cleaning the plugs first before looking further.
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Dark Lord Of Custard

snigger.....