Association) AMASuperbikeChampionship(英语:AMASuperbikeChampionship) AMA Supersport Championship(英语:AMA Supersport Championship) AMA Formula Xtreme(英语:AMA Formula
Hayden騎單車遭撞不治. ETtoday新聞雲. 2017-05-23 [2021-05-31]. (原始内容存档于2021-06-03). Superbike, Hayden investito in bici: danno cerebrale preoccupante. La Repubblica
掛系統,裝置長衝程的單缸四衝程引擎,變速器最多只有一或兩個排檔,有「speedway」、「flat track(英语:AMA Grand National Championship)」、「grasstrack(英语:Grasstrack)」、「long track(英语:Long track motorcycle