um 1 ot-27 (40/18 tooth)
thingiverse
My brother required this component after it stripped itself completely. Following a few measurements and counting teeth, this resulted and fits perfectly, unless it shrinks, in which case you might need to open up the center slightly or as we did melt in bushing in place with a soldering iron. Therefore, if you possess a Kyosho from the 80's with this gear here, enjoy.
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