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four speed and nutrul and clutch
make a body
have 4 red and one yellow
put the wheels together
33 chain links
sorry for bad quality :(..... and ur done! !!! :))))
K'nex gearbox: Make your K'nex motor 6x faster!by H1T4TCH1
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K'nex Gearboxby dickheijboer
The K'nex 3 Speed Gearboxby knepic
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