homemade differential for 4 wheel drive

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machinebike

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Hi, I just finished converting the differential from a 1/8 scale to be able to use a regular gas engine with a sprocket and chain.

Im not sure what a good engine to use would be.

I have a chopper scooter engine with a light coil and trans, but seems to be heavier than Id like.

I believe its a 43 cc


I lengenthened the rear a few inches back on my 1/8 to make it longer.
any suggestions?
 

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