If u buy a restored one then you will not know what's in the bike. You will be taking a risk and hoping that the previous owner used good stuff while restoring. I wont recommend taking a chance when investing 250k+ for a bike.
I know a pakwheeler who claimed that his gs750 was restored immacuately but when it was sold the new owner had to spend upward of 40k on engine.
It is best to restore yourself through a good mechanic. If you are in lahore then i can help u prepare a good gs500 
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