should i let it go?

[chopper511]

hi all,
I have had an 83 xt600 for around a year and love it. all sorts of fun in deserts in W.A aus, then had it trucked to NSW where I now live. I rode to Melbourne (1000km) and it seized. I have taken it apart and found the piston to be, well, a bit melted. as far as I can tell the cylinder can be rebored, piston replaced, bearings replaced etc. is a rebuild worth it? I changed the oil and filter before i left ( ignoring obvious 'must maintain bike better or at least keep fluids topped up' maintainance) The bike hasn't been treated badly (aside from me). the bike is in bits now and i have access to tools I need to do it. I am wondering though, is it worth the time and expense to rebuild the engine? I am intending to have the thing around for a while and hopefully do quite a few kms. I know anything can be fixed but given the age and purpose of these bikes, should I be thinking about something a little, well, less stressed. I would appreciate any input. thanks.