I ran into a guy a while back that had an SRX 700 with 13,000 miles (Lots more kilometers, what about 20000?) on the original engine. No new rings, pistons or anything according to the owner. Still ran great. I know there are a lot of differing opinions here on this but I think the original Yamaha build is pretty hard to beat. And they definitely do last a bunch longer than they used to.........:m2c:
Good luck with your sale Vmax4Ken on this very clean V4!