As Charlotte sez..seized rose joints on the suspension loop have been known to snap off!!, painted swingarms can rust quite badly where the crud gathers and the good old flaking engine paint thing (which can be fixed quite easily/cheaply)
This is an obvious thing to look for but many 600's seem to have small dinks in the tank, where they have been dropped by there (learner!) riders, and the switchgear has clouted the tank.
The 600 motor is pretty tough as its been around for gazillions of years dating back to pantahs etc I think so you should be alright.
Youd also be surpised how much fun the little 600 can be!!! I bought mine to tidy up and sell on again, but its great as a second bike to pop into town etc and have had it for 2 years now...!
Are you in any rush to buy ?? I have a '97 bike, very tidy, white number boards signed by hodgson blah blah...but wont be able to give a decision on if im selling for the next couple of months (until I get my accident compo and think about trading it up )..
Nat
[Edited on 12-3-2004 by Nattyboy]