Hello. I'm after the plastic piece that fits onto the end of the throttle cable and to the top of the rocker box cover. I have the spring and the white nylon piece it's the black piece I really need. Can anyone help?
Go to a bicycle shop, ask for a scrap rear derailleur. and get its shift cable adjuster. Fix it with a couple of nuts in place of this plastic piece, and you have just made a perfect replacement, that will never break!