I recently bought a second hand Sym Mio 100 from 2005 with only 1700km on the clock.
Last week I drove it for the first time during the night and saw that the light inside the "dashboard" or speedometer changes colors after a while. It started out green but after 15 minutes driving it became red. I've also seen it turn blue once.
Is there any indication behind these colors ? Should I be worried when my speedometer turns red?

Thanks