Aprilia RS125

Aprilia RS125
Manufacturer	Aprilia
Parent company	Piaggio
Production	1980's's-date (road and racing)
Predecessor
Successor
Class	Sport bike
Engine	124.8cc
Top speed
Power
Torque
Transmission
Suspension
Brakes
Tires
Rake trail
Wheelbase	1345mm
Length	1950mm
Width
Height
Seat height
Dry weight
Wet weight
Fuel capacity
Related
Similar	Cagiva Mito, Honda NSR125, Derbi GPR125, Yamaha TZR125

The Aprilia RS125 is a GP derived replica sport production motorcycle. It is powered by a single cylinder 2-stroke, Nikasil coated aluminium cylinder block, liquid cooled 124.8cc Rotax engine.

Aprilia has had many Grand Prix victories in the 125cc and 250cc 2-stroke classes. With years of racing experience, Aprilia has released a new version of the RS125 with new looks, performance & styling.

Key features of the new Aprilia RS125 are: New frame technologies that promise superb agility and are much lighter than previous model. Combined with new frame structure and material the frame is a re-creation of the one used on the Aprilia GP125 racing bike. New racing wheels with Y-spoke configuration make the rim lightweight while retaining high strength. They are made from a die cast moulding process which reduces unsprung weight and guarantees rigidity under racing conditions.

Specifications

Engine

Liquid cooled, single cylinder two stroke. Aluminium cylinder with Nikasil coated liner. Reed valve intake. Separate lubrication. Homologated to Euro 2 standards.

• Bore By Stroke: 54 x 54.5 mm.
• Displacement: 124.8cc
• Compression Ratio: 12.5 ± 0.5:1
• Carburettor: Dell’Orto PHBH 28.
• Ignition: Electronic CDI ignition
• Starting Method: Electric
• Alternator: 12V – 180W
• Lubrication: Separate mixing with variable displacement, volumetric pump.

Final drive

Chain: 17/40 (2.35)

Clutch

Multi-disc in oil bath.

Frame

Cast aluminium, reinforced box section, sloping twin-spar frame.

Suspension

Front suspension: Upside down hydraulic fork, Ø 40mm. Wheel travel 120mm.

Rear suspension: Cast aluminium box section swingarm with asymmetric members. Hydraulic monoshock with adjustable spring preload. Wheel travel 120mm.

Brakes

Front: Floating Ø 320mm disc. Radial caliper with four different diameter pistons, Ø 32mm – Ø 27mm. Rear: Single Ø 220mm disc. Caliper with two Ø 30 mm pistons.

Wheels

Aluminium alloy. Front 3.00 x 17”; rear 4,00 x 17”.

Tyres

Tubeless radial. Front 110/70 17”; rear 150/60 17”.

Fuel tank

14 litres (3.5 litre reserve) 14 litres

External links

• Aprilia.com - Official site
• Apriliaforum.com - Owners forum
• Aprilia.7kt.net - Norwegian owners forum

Aprilia RS 125