APRILIA RS4 125 ข้อมูลจำเพาะ

A powerful water-cooled 4-stroke DOHC single-cylinder 4-valve engine combines with an electronically controlled fuel injection system to realize sporty driving that makes maximum use of the engine characteristics of a slow racing. In addition, Aprilia ・ Quick Shift ・ system, which is the first in the 125 cc class, is set as an option.This system is the racing technology itself of the RSV 4 APRC. By installing this quick shifter, it is possible to quickly shift up the accelerator fully without opening the clutch, smooth acceleration in the circuit running, It realizes reduction of time loss. The main frame of RS4 is designed based on experience of many race activities.It adopts lightweight aluminum material, and it is a frame with a structure that is light and has high torsional rigidity.Also, a cantilever type monotonic shock absorber is attached to a swing arm which is asymmetrical in bilateral symmetry. The front suspension is equipped with an inverted fork of 41 mm diameter and boasts high rigidity. RS4 has a strong braking performance, adopting a 300 mm diameter stainless steel single disc and a radially mounted 4 piston caliper at the front.A single piston caliper is attached to a 220 mm diameter stainless steel disc on the rear.