Hello, hopefully you guys can lend me some advice w/purchasing a '99 Monster I'm interested in. I found a guy who is selling a heavily worked on 99 Monster w/7000 miles. He did a lot of work to it with changing the bars, swingarm, pipes, etc. Bike looks great. The problem is that asking him if any service has been done to the bike, he said "his friend" did it, which sounded funny to me. I'm leary to purchase a bike where the valves were done privately by a guy, who may not know what he's doing. Is there anyway I can tell if the work was done right? Also, the tires have about 3k miles on them (I haven't seen the bike in person yet). Considering regular wear on them, would that be nearing time to replace them? I'm interested in the bike but I don't want to spend a ton after I get it, to have it running smoothly and reliably. Thanks for your help!