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Harley-Davidson is recalling more than 3,300 FXDL Dyna Low Rider bikes because engine vibration can turn the ignition switch from "on" to "accessory."

The recall covers motorcycles from the 2014½ model year. If the engine has been modified to rev higher than 5,600 RPMs, an engine mount bracket can vibrate excessively, causing the problem.

If the switch goes to "accessory," the engine can shut off while being driven and potentially cause a crash. The company said there have been no crashes or injuries reported from the problem.

Dealers will replace the bracket assembly and ignition switch knob for free. Harley began notifying owners in late July.

Harley-Davidson says the motorcycles are limited at the factory to 5,600 RPMs, but the company offers performance calibrations that let the engine rev higher than the limit.