The keep on is breaking in beautifully, around 1000cc's now, still running on the rich side of the tune. The needles are in the ballpark of tune still taking it easy with some wot passes and backing off before it screams. This is the smoothest running engine I've ever owned. It runs so sweet and mellow all the way through the rpm with no issues. Only encountered 1 problem so far, something got wedged between the flywheel and front bearing and dented the shield in enough to cause a bad leak. It was pouring fuel and temping in the 250-260 range. Good thing I wasn't hard on it or there may have been serious issues. I replaced the bearing and now it tunes very consistent with the needle settings. Temps back to around 210-220 and idles all day like a dream. Byrons race 3000 gen 2 11% with 1.5 oz of Byrons lube booster. I am now a firm believer in castor oil and after run oil. It leaves a nice coating all over the internals and protects very well. I believe that is what saved my engine during the bearing leak and sucking extra air. Glad I caught it as soon as I did.