If it were your tip over sensors you'd almost certainly be not able to start the bike.
For starters I'd check the all the electrical connectors leading into the cylinder heads. BMW conveniently stick some of these on the outside of the bike (near the air intakes - the black plastic tubes). These are designed to be pulled apart - check they're located properly?
If this doesn't help, was there any other visible damage? Are rocker covers mangled? Do you have any leaks anywhere? Are your battery terminals all tight etc? HT lead connectors seated properly onto the sparks?
Failing this, have your throttle bodies balanced. Im not sure how your spill could affect this, but it could be an issue. Suggest you do this after all checks for electrical gremlins.
From what you've given i'd err that it was more electrical than mechanical, as i've experienced this before and it was the revs causing resonance on a connector which then made poor running.
Good luck!
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