ive always loved the styling of the k models, like the sport f the best. i would put a little effort in getting the k model riding and looking good. i know my answer doesnt help in your quest for a “cafe racer” . the c model is a awfull starting point . your using the k front attached to the c frame and rear? i would use the k frame, plus you have wire wheels. the k might look ok with rearsets, different bars, 4-1, plus other performance upgrades, good luck and carry on