I wouldn’t worry too much just yet. It could be a bit of moisture in the electrical connector behind the dash. Then again it could be a wire starting to break down between the headset and the coil (I think that’s where the tacho gets it’s feed from)
Whilst it’s working generally ok, on a scoot of that age I wouldn’t fret as you’re likely going to get a few foibles.
I have an intermittent issue with the left hand bulb on my instrument binnacle deciding whether it wants to work or not. I’ll deal with it next time I have the cowl off. I’d recommend you adopt a similar approach and when next you have occasion to whip your cowl off, have the instrument connector off and give it a good squirt of WD or Wurth.
If it’s sporadic, diagnosis is going to be difficult as the Law of Sodde will probably guarantee that if you get a multimeter on the wiring, all will be appear fine.
If it ain’t broke don’t fix it or you’ll fix it ‘til it’s broke.
Sent from my iPhone using Tapatalk
