They have changed back & forth from red to black to red before, from Honda. I have some old ones, and in both colors, for the (3) 750s I'm slowly rebuilding for sale someday. On the ones I have, the covers are the same color on both ends(!), whether black or red.
Sometimes they are available at PartsNmore/VintageCb750, too. Some of them have a 14 awg red or red/white wire on the starter's end of the cable, but some don't. On those bikes where the small wire wasn't in the battery-side ring terminal, a separate red/white wire with ring terminal fit on top of the (+) side and went to the bullet connector in the harness by itself. This came and went during the K4-5-6 era.
