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2001 Kawasaki W650, 11k babied miles, I've had it a year/2k miles.
I'm just back from an evening joyride (my 4th since bringing her out of winter hibernation) and am a bit worried by a hesitation issue she displayed. We'll be humming along nicely, and occasionally out of the blue a little blip...pause...dip in power. As if tapping the front brake. Not enough to worry about being thrown, but certainly noticeable and enough to bum me out at the thought of bringing it to a dealer...varies between a barely perceptable hiccup to actually making it dive a bit. During a 45-minute ride it happened 3 times in the first half-hour and then three times within a couple of minutes at the end. Some were during acceleration, some while just maintaining speed.
This may not be totally new – could have happened a bit last year, but nowhere near this often, below the levels that caused me to think twice about it. I thought it might be the plugs, so I changed 'em out, but it's still happening. Air filters were thoroughly cleaned before putting it back on the road. It doesn't feel like a chain/sprocket skipping issue...altho that's never happened to me so I don't really know.
Any ideas?