Ok so I have a 00 naked sv and it has 18,000 miles on it. The common cam chain tick has been buging the sheot out of me. It has made the noise since the day I bought it(it had 8,000miles). I really want to get this taken care of even if it doesn't make a difference engine wise. The noise just makes me not want to ride the damn thing anymore. It has gotten no louder but it is definitley there. How extensive and expensive is it to get this taken care of ????