Hello all.  Last week I responded to an ad on craigslist for a "broken motorcycle" and went to pick up what I thought was a rough looking parts bike for my CB750K3. Seeing the bike in person I noticed that it was an earlier year than mine by the top clamp.  After unloading it I figured it to be sandcast by the frame and engine numbers and the texture of the cases.  The frame number is  3312 and the engine number is 3374.  Do you guys notice a difference in power between the KO motor and the later builds?  I'm not certain what I'm going to do with this bike now.