Points action principle divide into handthrottle and Hydraulic throttle.
按动作原理分为手动节流阀和液动节流阀。
2
A style of braking made popular in the 1990s following the arrival of hand clutches so that drivers could keep their right foot on the throttle and dedicate their left to braking.
1990年代开始流行的刹车方式，这样车手在用左脚刹车时，其右脚可以控制油门。
3
B "mode, on the other hand, provides less sharp response to input for riding situations that require especially sensitive throttle operation."