NHTSA recall 16V528000 (verified) covers 2015-2016 CBR300R, CBR300RA and CB300F for a crankshaft machining error. The flawed machining loads the bearing retainer until the plating fails; when the retainer breaks the connecting rod loses its geometry and the engine locks up. On a bike this size the repair costs more than the machine.
On any used motorcycle, check the tire DOT date codes, ask for the valve service receipt, and look for drop damage on both sides before you talk about price.
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General reference information only , not a mechanical inspection, appraisal, or vehicle history report, and not specific to any individual motorcycle. Failure patterns describe documented tendencies across many machines; any single bike may be better or worse. Cost figures are rough estimates , verify locally. The absence of a warning is not a statement that a motorcycle is safe. Always verify recalls directly with NHTSA and have a used bike inspected. Not affiliated with any manufacturer, dealer, or reporting service. No affiliate links, no commissions, no ads. © Used Car Informer, operated by MCC LLC · v3.1