Tidy bike for 20yrs old. I would have the biggest lock I could find leaving it unattended. I wonder if its had some Dave Lambeth treatment, he specialised in the old XT's. I had the pleasure of going to his workshop once & he had 3 XT600's with the small petrol tanks in white & red in various state's of restoration. They looked as though they had just rolled off the production line at Yamaha. Dave was in Surrey or Sussex I think, he used to organise bike expeditions too.