Do sandcast generally tend to run better and last longer than say k0-k8 due to them being more hand built and attention to detail than later engines? Just curious because I have had quite a few cb750's and my new sandcast with 42,000 on the clock runs better and is quieter and smoother than any other 750 I have had. It will idle perfect at 500 rpm which I find amazing. I'm also trying to figure out if its been rebuilt. I also found a red round sticker that was under the airbox it looks to be from the factory any ideas???
