{"nhtsa_id":11007548,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-09-09","date":"2024-08-22","document_id":"M1651","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; UNKNOWN OR OTHER; ENGINE","mfr_system":null,"summary":"SERVICE BULLETIN M1651: 2023-2024 CENTER-COOLED REPLACEMENT CYLINDER HEADS. PURPOSE: This bulletin informs dealers that ignition coil mounting bracket bosses for all 2025 Center-Cooled cylinder heads have been standardized. The mounting bosses will be machined to ⅜-in. diameter for all production and replacement cylinder heads. Initial Release. 8/22/2024.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11007548-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2024/MC-11007548-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11007548","components":[{"id":"engine","name":"Engine","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"HARLEY-DAVIDSON","model":"FLHX","year_from":2024,"year_to":2024,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLHXSE","year_from":2023,"year_to":2024,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLTRX","year_from":2024,"year_to":2024,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLTRXSE","year_from":2023,"year_to":2024,"match":null,"vehicle_ids":[]},{"make":"HARLEY-DAVIDSON","model":"FLTRXSTSE","year_from":2024,"year_to":2024,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"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.","attribution":[]}