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Service bulletins for the 2020 Honda Grom

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

10 on file from NHTSA, as of 2026-10-19.

By type

By component

Bulletins, newest first
Grom125 #3 - August 20262026-08-24. Service bulletin. FUEL/PROPULSION SYSTEM. Service Bulletin - A fuel permeation test revealed that the fuel system does not meet regulatory standards. The fuel system has a lower than expected permeation value and is not within emission certification compliance.
MCPSC082020269032026-08-24. Other. FUEL/PROPULSION SYSTEM. Dealer Message - The full service bulletin and parts availability for the Emissions Recall relating to 2020-2026 Grom 125 FUEL SYSTEM (GROM 125 #3) have been delayed until April 2027. Dealers will be notified again by iN message once the bulletin and parts become available.
ONLKS7042920262026-05-06. Emissions. FUEL/PROPULSION SYSTEM. "Owner Notification Letter - American Honda Motor, Inc. is conducting a voluntary recall for ALL 2020 - 2026 MSX125 Grom motorcycles. Our records indicate that you may own one of these motorcycles. This notice is sent to you in accordance with the Environmental Protection Agency regulations."
Grom125 #3-February 20282026-03-03. Service bulletin. FUEL/PROPULSION SYSTEM. Service Bulletin - A fuel permeation test revealed that the fuel system does not meet regulatory standards. The fuel system has a lower than expected permeation value and is not within emission certification compliance.
GROM125 #3 - October 20252025-10-14. Service bulletin. FUEL/PROPULSION SYSTEM. Service Bulletin - A fuel permeation test revealed that the fuel system does not meet regulatory standards. The fuel system has a lower than expected permeation value and is not within emission certification compliance.
MCPSC100620259022025-10-14. Other. FUEL/PROPULSION SYSTEM. Dealer Message - A fuel permeation test revealed that the fuel system does not meet regulatory standards. The fuel system has a lower than expected permeation value and is not within emission certification compliance.
GROM 125 - August 20252025-08-18. Service bulletin. FUEL/PROPULSION SYSTEM. Service Bulletin - A fuel permeation test revealed that the fuel system does not meet regulatory standards. The fuel system has a lower than expected permeation value and is not within emission certification compliance.
MCPSC080720259022025-08-18. Other. FUEL/PROPULSION SYSTEM. Dealer Message - A fuel permeation test revealed that the fuel system does not meet regulatory standards. The fuel system has a lower than expected permeation value and is not within emission certification compliance.
AMV2005022020-05-19. Service bulletin. EQUIPMENT. Video Message - It concerns how to replace a leaky front rocker arm oil control valve. Due to a deteriorated lower gasket or an out-of-spec gasket groove, the front rocker arm oil control valve can leak in certain V6 models with variable cylinder management. To fix this issue service bulletin A20-023 was posted. Please let us know if you would like a copy of the video sent to you on a DVD or thumb drive.
AMV2005012020-05-19. Service bulletin. EQUIPMENT. Video Message - It concerns how to replace a leaky front rocker arm oil control valve. Due to a deteriorated lower gasket or an out-of-spec gasket groove, the front rocker arm oil control valve can leak in certain V6 models with variable cylinder management. To fix this issue service bulletin A20-023 was posted. Please let us know if you would like a copy of the video sent to you on a DVD or thumb drive.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.