Bonz, as long as you keep up on the maintenance, buy a new or needed piece now and then and still like to look at her and ride it for fun, then enough will never come. I quit riding because my aches and pains said it was time, but parts of my bike are still in service, the engine most notably still punishes the back roads of Montana, in the frame of one of our long time Bonnie cohorts from back in the day. Look at all the clapped out or basket case Triumphs we looked at before we bought our bikes.No rule says your 50 year old bike needs to fall into those former categories to deserve some love and sprucing up. She’s still a fantastic looking bike..