I have been riding the 1999 R6 for about 5k trouble free miles, and decided it was time to have the valves looked at (there was a some noise and total mileage on the bike is 25,000). So I brought it into the Pony, got valves checked, then had the cam chain replaced (the actual source of the noise), and had some stainless steel brake lines put on while it was in. I pay about $750 for parts and labor. Thursday night (150 miles later) I think I hear a little noise coming from the engine as I put it away at the end of a ride. Friday morning I start the engine and hear a terrible rattling noise. Sounds like someone is shaking a box of rocks. I am thinking the cam chain tensioner must have fallen off or broken (it sounded like excessive cam chain noise) so I call the Pony. They are great - they offer to pick the bike up and that night cmoosego shows up with the Pony trailer. Saturday I get a message to call the service department. I call back and get cmoosego on the phone, and he asks me if I am sitting down. I then find out that the noise is not from the top end, as that checked out fine, but is probably coming from the piston or connecting rods. At this point I am already into it about $3500 (maybe more, I don't really want to do the math). I am now looking at $1000 more in repairs. I am having trouble justifying putting that much into an old machine, and am leaning towards unloading it at a substantial loss. My question to you guys - what would you do? Would you fork over another grand or would you try to get a bit less than twice that out of selling it?