by EKHKHK56 » Sun Sep 13, 2015 10:25 pm
Jerry`s right, those are most likely KK cams, same as KHK profile. Loosely based on the 53KR cams. If the intakes lift around .480" no doubt they are. They surely have aggressive duration. Stock K lift is about .450. Chances are you have a 53KK, since the cams and the 1953 right side case. The 53KK cylinders will be cleaned up portwise and have bigger intake valves if original. So possibly someone blew out the left case and replaced with a loose 52 one, and never got aroind to pitting the 53KK # on it. However at this point I think you should pursue it as a 52 as that is what the left case is with pad. The missing number will be 52K XXXX. The first `X` will be a 1 or a 2. The first 1,000 Ks started serial# with a 1, after that it switched 2 for first number till the end of the approximately 1900 bike run. Yes, head clearance with the valves open must be checked and set if those are not factory heads with engine. The K will scoot nicely with those cams as you must know! Erik