My Kyosho Optima has its front left dog bone missing in the wood.
I don’t have any spare part for it. However, I do have a slightly shorter shaft (about 1cm shorter) from another car. I also have some extra shim washers and slightly longer shaft cups.
Because the replacement shaft is shorter, I need both ends to get closer. Some washers are added to the cup of the wheel end. The cup on the diff end is replaced with a longer one (about 2mm longer, which is all that I have in my pile of parts). To make sure the shorter shaft won’t fall out during a turn, cushions (small screw plug, about 3mm in length) are added to both cups to minimize room for play.
Now it is back to normal:
Keep in mind this method works because the legacy Optima has a special wheel adapter structure which does not require the use of any king pin to hold the wheel adapter in place. For modern cars you may need a longer shaft cup to achieve this.
