Old Motorized engine CHAIN SIZE HELP

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ryan10232

New Member
Jul 2, 2012
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I have an older motorized bike engine and the chain just snapped. I need to replace the chain but I cant seem to find it anywhere. There are no markings on the chain or the engine sprocket. I have order a #40 and a #41 and neither fit. My sprocket on my engine has ten points. Do I have an odd chain or am I just ordering the wrong ones?

The chain has the following measurements:

Pitch (pin to pin on one link)
1cm

Roller Diamiter
1/2 cm

Width of chain
1cm