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Post #85 in this thread states what the chain is.
The rear sprocket on the 2021 KPM200 has 49teeth on 428 chain, and is off set (dinner plate shaped) so I couldn't find any other sprockets that I could safely switch to.
Front sprocket is 16 teeth on 428 chain, this front sprocket has a 20mm shaft hole with 2 bolts and a small gold ring.
The chain is 428 chain 128 links long, if you buy a replacement go with the o-rings
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