What the diagnostic check adds
A pre-purchase diagnostic scan can reveal stored or current control-unit faults and may provide useful system information. It complements, but does not replace, a careful mechanical inspection, road test where lawful, identity checks and service-history review.
What it cannot guarantee
A scan cannot prove that a motorcycle is free from mechanical wear, hidden damage, intermittent faults or future problems. Recently cleared codes may not yet have returned, and not every condition creates a diagnostic fault.
Plan the inspection
Permission and safe access to the motorcycle are required. Provide the exact model, year and location before booking so connector and likely system coverage can be checked.