Welcome to the forum. I reckon i saw that CBX250 on Facebook for sale today ? Not sure about the CBX, but my FZR250 has just hit 60,000km's and is still running well and that's an inline 4cyl with an 18,000+ rpm redline
To me , it's like everything , it depend's how it's ridden and what level of maintenance it was kept at. But i still think that at 60,000km's it's due for some work.I have pictures of a certain Yamaha SRX 250 that had just over 50,000Km's and there where sign's of it burning oil in the top end.Other's that have a lot more knowledge will chime in soon.
There were 2 for sale on slumtree now there is one Ive seen em get up around 90k and still running....just. They have issues as do most honda singles but nothing to serious. I owned one in the 80's and they are a good little fun,easy to maintain bike....
Yes; sadly, it has been sold, but I know the owner and will keep in touch with how it goes! Have a Motorcycle Expo on at Lockleys here in Adelaide this Sunday; have purchased a 96 KLR 250 in Immaculate condition with just under 20,000 ks; Should last quite a while? Have ridden an FZR 250, verrrry smooth bike. Good to see the littleys last almost as long as the biggey's when it comes to longevity! Cheers! Gary