{"nhtsa_id":10191958,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-05-08","date":"2021-04-12","document_id":"A_210393_RC_EN","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Aprilia RS 660 and Tuono 660: Exhaust valve clearance - Technical update - Campaign Code: PA0ZZQ2101_Stock-PA0ZZQ2101_Sold Dear Dealer / Service Center, through the ongoing, stringent quality control activities we perform on the components installed on our vehicles and our continuous research to develop better new technical solutions, in keeping with our commitment to ensure the best ownership experience possible for the customer, it has come to our attention that it is necessary to check and, if necessary, correct the exhaust valve clearance on the aforementioned vehicles to prevent the possibility of valve noise during engine operation. During this procedure, the special screw with seal of the timing chain tensioner and the oil plug with seal must be replaced with new parts. Please determine which vehicles in your stock or sold by you require this update, and: Update all vehicles in stock before sale .","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191958-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10191958-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10191958","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"APRILIA","model":"RS 660","year_from":2021,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"APRILIA","model":"TUONO 660","year_from":2021,"year_to":2021,"match":"base","vehicle_ids":["2021_aprilia_tuono"]}],"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":[]}