Engine’s tougher on modern versions, less likely to die an early death if neglected and thrashed. Expect 40k from a reasonably treated example, half that when oil changes neglected. Engines on the way out churn out loads of noise, vibes and oil. Chassis rot can be a problem, especially swinging arm bearings.
'80-85,’93 on 249cc OHC single 21hp 80mph 85mpg 310lb