Did I Buy a CHILD S BIKE CB175 Walkaround CB175/CL175/SL175 cylinder head with cam holders, valve train & ignition advance mechanism. Bmn / Cega / Cfja (4). Manufacturer Part Number likely to be 12020-306-030 or 12200-315-000/010. The item CB175/CL175/SL175 CYLINDER HEAD WITH CAM HOLDERS, VALVE TRAIN & IGNITION ADVANCE is in sale since Thursday, December 24, 2020.