The bike will no longer downshift reliably. This jeopardizes the rider because the inability to select a lower gear to slow the motorcycle using engine braking and when arriving at a traffic light or an intersection that requires a lower gear to pull out from a stop safely into traffic. This has not been verified yet by a professional but I have an appointment in a few days from now (on August 5, 2025) with a local Triumph dealer to inspect and correct the issue. After some internet research, this downshifting issue/gearbox failure appears to be common among certain Triumph Bonneville models manufactured after a certain date. The bike did not and does not provide any indication when the failure to downshift will occur. There are times when gear selection functions flawlessly but then unpredictably will occur again during the same ride.
- NHTSA ID
- 11677706
- Incident
- Jul 27, 2025