I dont know what happed to this sprocket

Yikes.
Kerb, dropped a wheel off the track or maybe debris. For debris though I’m not sure how a big enough chunk would pass under the frame to do that much damage.

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thats what we that happend but the driver behind me had a go pro and i did not go off track and we put the kart on jacks and the frame had no scratches

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Did a weight fall off or something and take the sprocket out?

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Briggs power by looks of it

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its a lo206 engin in a tony kart cadet

no we have no idea what happened nothing on track the gopro of the driver behind got nothing

Can you share the gopro video for fun?

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i am going to the track this weekend i will ask him

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I’d say you punched a kerb couple of laps prior to failure.

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ya maby that happend

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If the chain is being re-used, check it for damage and scuff marks.

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