Sounds like a rectifier problem. They can go at any time/age.
Classic case of stuff just âdyingâ, and the bike cutting out. A temp charge will get you âso farâ, but wonât sort out the problem. Prob around ÂŁ100 to sort out (unless you get the part elsewhere, and a mate to fit?).
But check thatâs the problem first before buying bits. A multimeter and someone who knows what theyâre doing should be able to diagnose pretty quickly.