Hi Folks. I'm new to the forum (but not new to the SV..!).
My 2003 SK3 has been standing still for a few months owing to bad weather and my reluctance to get cold/wet (it's my age!). It's previously been running fine and I recently changed the magneto and flywheel (magnet issues), and battery and reg/rec. Used it for some time after that and it's been fine.
After standing still for some time, I got round to starting it this weekend. Took a good few goes but fired into life. Smoked a load, smelled rich and ran lumpy as hell. Had to keep the throttle twisted to keep it alive. Anyway, it finally settled down and seemed to idle ok-ish.
Rode into work this morning (Kent to London, 45 miles) and it was rough as hell at slow speeds/revs, but seemed to run fine on the motorway at higher speeds (70-90mph). Then, slow speeds around town, chugging and lumpy again. I managed to get it here without stalling, but I had to give it a handful and slip the clutch a lot away from the lights, as it loses power, stutters, kicks into life/full power, then drops down to 'crappy power' when I'm back at low revs/idle again.
It feels to me like either fuel starvation or lack of spark? Any bright ideas anyone? I don't have any warning lights and I topped the fuel tank up before I left home this morning.
I would assume the fuel's got a bit mucky over time, so I've put some fuel/injector cleaner in it and it showed signs on some improvement later on in my journey. I've seen the fuel residue left behind in the carbs of my old Kawasaki ZZR that stood for some time, so I know what issues it can cause. But maybe the spark is weak too?
Anyway, I'd be grateful for any pointers
Any questions, ask away.