I would go, if it would be highway riding mainly, without excessive clutch-in / clutch-out cycles (and the rest of the bike has been serviced and is in good condition).
You could take the cable out and inspect the strands by the end close to the clutch lever, which is the most common point of failure, making an estimate of the remaining life.
Just in case of an emergency:
http://faq.ninja250.org/wiki/Can_I_r...able_breaks%3F