The 2021 Yamaha MT-09 has two recalls, both tied to ECU software that can cause the engine to stall or produce unpredictable throttle behavior, raising the risk of losing control.
Both issues trace to the same root: the engine control unit's programming affects how the throttle responds and how the engine idles. The throttle position sensor's internal brushes can wear unevenly due to the software problem, leading to unstable idling or a sudden stall. The ECU can also limit throttle response or fail to illuminate the engine warning light when a system fault is present, leaving the rider without any indication that something is wrong.
At a glance
What can fail
The throttle position sensor brushes may slide excessively due to incorrect engine control software, causing unstable idling or engine stalling.
What the fix does
Dealers will reprogram the engine control software and replace the throttle position sensor at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
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At a glance
What can fail
The engine's control computer may have incorrect programming, which can reduce throttle response, cause the engine to stall unexpectedly, or prevent the warning light from turning on when a system fault occurs.
What the fix does
A dealer will reprogram the engine's control computer at no cost to fix the programming issue.
Summarized — see the official notice for exact wording, dates, and contacts.
