CB750 Service Bulletin #27 15/3/72 Spark Plug Fowling at Low Speeds by SteveD | Aug 30, 2018 Download Version 1.0.0 Download 7 File Size 0 File Count 1 Create Date August 30, 2018 Last Updated May 2, 2019 CB750 Service Bulletin #27 15/3/72 Spark Plug Fowling at Low Speeds