Kalteisen
New Member
A 1979 Honda CB750F recently showed up at the shop (with title, score!). It's in pieces and in pretty rough shape. The engine had water in it and the pistons had to be broken up to get them out (done by the previous owner), but the heads are in good condition (just valve work). The previous owner managed to find a '79 K motor, which came with the bike. I also have a set of CB900 cams.
My question is what are the differences in the F and K motors? I know the heads were a big one. Is there anything else? My options are to just use the K motor as is, or use the F heads on the K motor with the 900 cams, or find '79 F cylinders and build the original motor.
I have a stock 1980 CB750F and am working on a 1981 CB750K project, so I'm sort of torn on which direction to go. Any insights or suggestions would be helpful.
My question is what are the differences in the F and K motors? I know the heads were a big one. Is there anything else? My options are to just use the K motor as is, or use the F heads on the K motor with the 900 cams, or find '79 F cylinders and build the original motor.
I have a stock 1980 CB750F and am working on a 1981 CB750K project, so I'm sort of torn on which direction to go. Any insights or suggestions would be helpful.
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