Could old/low battery trigger misfire and engine light?

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Following the good advice from the previous posts you could do a load test by starting the engine and watching the green neutral light, ( from experience ) if the light dims during the initial engagement of the starter motor that would indicate a battery in need of charging ( by riding it for one hour or so ) or replacement if the charging was insufficient.

There are no fault code listings for low voltage in the electronic control unit but there is one in the abs unit, has your bike abs?

Anyway 6 years is about average for a yuasa battery, if the issue persists it seems well worth investing in another good battery, hope this helps and others may add their advice.