@Nortoon:
I bought a Yamaha RD250/350 3 times:
1. Was my first motorcycle at all, bought it 1977, rode it 5 years, sold it with 92,000 km on the clock. I knew every single screw of this machine by name.
2. 1983 I had a Honda CB500T, but stumbled over a used RD250. Bought it as a second ride, rode it, remembered, why I liked the CB500T more and sold it a year later to my brother.
3. 1988 While my main ride was a Yamaha XS650, I bought the RD250 back from my brother as I still was taken with it. I built it up to the 350 ccm displacement but rode it very seldom. I sold it 2007, when I was divorced.
No regret to sell it. I really enjoy, when I see a RD on the road or at a gathering. However, I'm perfectly happy without owning one.
It's like Nortoon says...