2013 Aprilia RS4 125 Specifications

Name: 2013 Aprilia RS4 125
Brand: Aprilia

Sport • Specs last verified 31 October 2026

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2013 Aprilia RS4 125 Overview

Aprilia RS4 125 is a sport motorcycle, displacing 124.8 cc. Power comes from a Four stroke, single cylinder, DOHC, 4 valves engine, a compression ratio of 12.5 ± 0.5:1. On the performance side, it delivers 11.7 kW @ 10500 rpm of peak power and 11 Nm @ 8500 rpm of torque. On the road, the 2013 RS4 125 tips the scales at 122 kg, carries a 14.5-litre fuel tank, offers a seat height of 820 mm and spans a 1350 mm wheelbase. The full 2013 Aprilia RS4 125 spec sheet below covers every technical detail, from suspension travel to tyre sizes.

2013 Aprilia RS4 125 compared with other bikes in the Sport category

We checked the recorded figures for the 2013 Aprilia RS4 125 against up to 2003 bikes in the Sport category in our database, counting each model once at the model year nearest to this one.

Only 68 of the other 1572 bikes in the Sport category have a lower torque than the 11 Nm of the RS4 125.
With 11.7 kW, the RS4 125 has the joint 68th lowest power output of 1341 bikes in the Sport category, 84% below the category average of 75.2 kW.
Engine displacement of 125 cc is smaller than that of 1829 of the other 2002 bikes in the Sport category.
Narrowing the field to the 627 models within five model years of it, the torque of 11 Nm is lower than that of 568 of the other 626.

Versus the 2011 model

The figures we track are unchanged from the 2011 model: peak power, peak torque, displacement and seat height all match.

2013 RS4 125 - Pros & Cons

Strengths

Strong power output: With 11.7 kW @ 10500 rpm and 11 Nm @ 8500 rpm of torque on tap, the RS4 125 is no slouch for its class.
Fuel injection: Fuel injection means consistent cold starts and clean throttle response without the fussiness of a carbureted setup.
Strong front braking: Stopping power up front is strong thanks to the disc setup, with plenty of room to upgrade further with braided lines.

Considerations

Tall seat height: At 820 mm, shorter riders will likely be on tiptoes at a standstill - worth sitting on one before you buy.
Chain final drive upkeep: Budget time for routine chain maintenance - it's cheap to replace but needs consistent attention to avoid premature sprocket wear.

Wear Points & Servicing Notes

Cooling system servicing

RS4 125's Liquid cooled setup is low-maintenance provided the coolant interval is kept - old, acidic coolant is the main cause of long-term corrosion in the water passages.

Fuelling & injector care

The Electronic injection on the RS4 125 needs little beyond good fuel and periodic use of an injector-cleaner additive - no jetting or float-bowl maintenance to worry about.

Brake disc and pad wear

Braking up front comes from single Ø300 mm disc, 4 piston caliper - solid stopping power, with disc and pad wear best checked on the same schedule as tyre changes.

Suspension condition on used examples

The RS4 125's suspension runs ø41 mm Upside down fork at the front. The rear uses Asymmetric swingarm with monoshock. Fork-seal condition and rear linkage play are the two things worth checking before buying used.

Final drive maintenance

The RS4 125 uses chain final drive, which is cheap to replace but needs regular cleaning, lubrication and tension checks to get a full service life out of the sprockets.

Frame & chassis check

Built around an Aluminum perimeter frame, the RS4 125's chassis is straightforward to inspect: look for corrosion, cracks or repair welds around stress points like the head-stock and swingarm mounts.

Low-speed handling

122 kg keeps the RS4 125 easy to move around in tight spaces, car parks and on the stand alike.

RS4 125 - Buying & Maintenance Guide

What to check before buying

Before handing over money for a used 2013 Aprilia RS4 125 with its 124.8 cc sport, cover the fundamentals: service book and oil change history, drivetrain wear, and any sign of oil weeping around the casings. This model runs chain final drive, so check chain slack and sprocket tooth profile specifically - a worn sprocket is a cheaper fix now than after it's chewed up the next chain. Now 13 years old, this sport is as likely to show age-related wear (perished rubber, seized fasteners, degraded seals) as mileage-related wear. Cold-starting it yourself tells you a lot - a healthy RS4 125 should catch quickly and settle into a smooth idle.

Oil and filter changes

Nothing protects the RS4 125's 124.8 cc four stroke, single cylinder, dohc, 4 valves like disciplined oil changes - stay on the manufacturer's schedule (roughly every 6,000 km or annually). With a 12.5 ± 0.5:1 compression ratio, running the octane grade specified in the manual matters more than on a lower-compression engine. Match the viscosity grade to what the owner's manual specifies, not what's cheapest.

Fuel system care

Fuel injection on the RS4 125 needs little attention beyond decent fuel and an occasional system-cleaner additive. Anything left standing for three months or more should have its fuel drained and replaced before it varnishes the injectors.

2013 Aprilia RS4 125 - Frequently Asked Questions

What engine does the 2013 Aprilia RS4 125 have?

The 2013 Aprilia RS4 125 uses a Four stroke, single cylinder, DOHC, 4 valves engine with 124.8 cc of displacement. It is liquid cooled.

How much does the 2013 Aprilia RS4 125 weigh?

The 2013 Aprilia RS4 125 weighs 122 kg. This is the manufacturer's dry figure.

How much power does the 2013 Aprilia RS4 125 make?

The 2013 Aprilia RS4 125 produces 11.7 kW @ 10500 rpm of power and 11 Nm @ 8500 rpm of torque. These are peak figures.

What is the fuel tank capacity of the 2013 Aprilia RS4 125?

The 2013 Aprilia RS4 125 has a 14.5-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 241-290 km between stops.

Is the 2013 Aprilia RS4 125 suitable for shorter riders?

The 2013 Aprilia RS4 125 has a seat height of 820 mm. This is towards the tall end of the spectrum and will require most riders under 175 cm to tiptoe at stops.

What brakes does the 2013 Aprilia RS4 125 have?

The 2013 Aprilia RS4 125 uses single Ø300 mm disc, 4 piston caliper at the front and single Ø218 mm disc, 1 piston caliper at the rear.

What tyre sizes does the 2013 Aprilia RS4 125 use?

The 2013 Aprilia RS4 125 runs 110/80 -17 front and 130/70 -17 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What gearbox does the 2013 Aprilia RS4 125 have?

The 2013 Aprilia RS4 125 is fitted with a 6 Speed transmission.

Aprilia RS4 125 Spec Evolution

The Aprilia RS4 125 was produced across 6 model years (2011-2020). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	2011	2013	2015	2016	2018	2020
Fuel Capacity	14.5 Liters / 3.8 gal	14.5 Liters / 3.8 gal	14.5 Liters / 3.8 gal	14.5 Liters / 3.8 US gal	14.5 Litres / 3.8 US gal	14.5 Litres / 3.8 US gal
Brakes - Front	Single Ø300 mm disc, 4 piston caliper	Single Ø300 mm disc, 4 piston caliper	Single Ø300 mm disc, 4 piston caliper	Single Ø300 mm disc, 4 piston caliper	Single 300 mm disc, 4 piston caliper	Single 300 mm disc, 4 piston caliper
Wheelbase	1350 mm / 53.1 in	1350 mm / 53.1 in	1350 mm / 53.1 in	1350 mm / 53.1 in	1353 mm / 53.2 in	1353 mm / 53.2 in
Brakes - Rear	Single Ø218 mm disc, 1 piston caliper	Single Ø218 mm disc, 1 piston caliper	Single Ø218 mm disc, 1 piston caliper	Single Ø218 mm disc, 1 piston caliper	Single 218 mm disc, 1 piston caliper	Single 218 mm disc, 1 piston caliper
Final Drive	Chain	Chain	Chain	Chain	Chain: 60/13 (4.61)	Chain: 60/13 (4.61)
Height	1138 mm / 44.6 in	1138 mm / 44.6 in	1138 mm / 44.6 in	1138 mm / 44.6 in	1135 mm / 44.6 in	1135 mm / 44.6 in
Gear Ratios	1st 11/33 (0.33) / 2nd 15/30 (0.50) / 3rd 18/27 (0.67) / 4th 20/24 (0.83) / 5th 25/27 (0.92) / 6th 23/22 (1.05)	1st 11/33 (0.33) / 2nd 15/30 (0.50) / 3rd 18/27 (0.67) / 4th 20/24 (0.83) / 5th 25/27 (0.92) / 6th 23/22 (1.05)	1st 11/33 (0.33) / 2nd 15/30 (0.50) / 3rd 18/27 (0.67) / 4th 20/24 (0.83) / 5th 25/27 (0.92) / 6th 23/22 (1.05)	1st 11/33 (0.33) / 2nd 15/30 (0.50) / 3rd 18/27 (0.67) / 4th 20/24 (0.83) / 5th 25/27 (0.92) / 6th 23/22 (1.05)	1st 11/33 (0.33) 2nd 15/30 (0.50) 3rd 18/27 (0.67) 4th 20/24 (0.83) 5th 25/27 (0.92) 6th 23/22 (1.05)	1st 11/33 (0.33) 2nd 15/30 (0.50) 3rd 18/27 (0.67) 4th 20/24 (0.83) 5th 25/27 (0.92) 6th 23/22 (1.05)
Width	740 mm / 29.1 in	740 mm / 29.1 in	740 mm / 29.1 in	740 mm / 29.1 in	760 mm / 29.9 in	760 mm / 29.9 in

Key Specifications

Engine

Four stroke, single cylinder, DOHC, 4 valves

Power

11.7 kW / 16 hp @ 10500 rpm

Torque

11 Nm / 1.12 kgf-m / 8.1 ft/lb @ 8500 rpm

Top Speed

Not recorded

Weight

122 kg / 269 lbs

Fuel Capacity

14.5 Liters / 3.8 gal

Full 2013 Aprilia RS4 125 Specifications

Year 2012 - 13

Model RS4 125

Make Model Aprilia RS4 125

Seat Height 820 mm / 32.3 in

Wheelbase 1350 mm / 53.1 in

Height 1138 mm / 44.6 in

Length 1953 mm / 76.8 in

Width 740 mm / 29.1 in

Dry Weight 122 kg / 269 lbs

Fuel Capacity 14.5 Liters / 3.8 gal

Coolant Capacity 0.8 Liters

Oil Capacity 1.2 Liters

Max Power 11.7 kW / 16 hp @ 10500 rpm

Max Torque 11 Nm / 1.12 kgf-m / 8.1 ft/lb @ 8500 rpm

Displacement 124.8 cc / 7.6 cu in

Engine Detail Four stroke, single cylinder, DOHC, 4 valves

Bore x Stroke 58 X 47 mm

Compression Ratio 12.5 ± 0.5:1

Cooling System Liquid cooled

Emissions Euro 3

Fuel Induction Electronic injection

Fuel Reserve 3.5 Liters / 0.9 gal

Ignition Electronic with CDI capacity discharge

Lubrication System Wet sump

Spark Plug NGK CR9EB

Starter Electric

Clutch Multiple discs, in oil bath

Final Drive Chain

Gear Ratios 1st 11/33 (0.33) / 2nd 15/30 (0.50) / 3rd 18/27 (0.67) / 4th 20/24 (0.83) / 5th 25/27 (0.92) / 6th 23/22 (1.05)

Transmission / Drive 6 Speed

Frame Type Aluminum perimeter frame

Suspension - Front ø41 mm Upside down fork

Suspension - Rear Asymmetric swingarm with monoshock

Rake 25°

Trail 94 mm / 3.7 in

Wheel Travel - Front 110 mm / 4.3 in

Wheel Travel - Rear 130 mm / 5.1 in

ECU Magneti Marelli MIU G3, Ø32 mm

Battery Type 12 V 6 Ah

Brakes - Front Single Ø300 mm disc, 4 piston caliper

Brakes - Rear Single Ø218 mm disc, 1 piston caliper

Tyres - Front 110/80 -17

Tyres - Rear 130/70 -17

Wheel size Front 2.75 x 17 / Rear 3.50 x 17

Wheels Light alloy with 6 split spokes

Specifications are compiled from manufacturer documentation and cross-referenced technical sources, and corrected on an ongoing basis. Spot an error? Let us know.