http://www.kawasaki-motors.com/model/er-4n/spec.jsp for those who can read Japanese.
An ER4-N, ER4-F model are revealed, with the magazine claiming they are to be introduced later this year. Like the ER6, the ER4 models will be parallel twins
最高出力: 32 kW(44 PS)/9,500rpm
最大トルク: 37N・m(3.8 kgf・m)/7,500 rpm