2011 Yamaha EC-03 Specifications

Name: 2011 Yamaha EC-03
Brand: Yamaha

Scooter • Specs last verified 13 July 2026

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2011 Yamaha EC-03 Overview

Yamaha EC-03 is a scooter motorcycle. Power comes from an Electric engine running Single Overhead Cams (SOHC) valve actuation, a compression ratio of 9.2:1. Bore and stroke come in at 83 x 64.5 mm. On the performance side, it delivers 9.60 Nm @ 280 of torque. Top speed is factory-quoted at 45 km/h. On the road, the 2011 EC-03 tips the scales at 56 kg, carries a 14.38-litre fuel tank and offers a seat height of 745 mm. That's roughly 129.9 kg lighter than the average scooter motorcycle in our database. The full 2011 Yamaha EC-03 spec sheet below covers every technical detail, from suspension travel to tyre sizes.

2011 EC-03 - Pros & Cons

Strengths

Accessible seat height: A 745 mm seat height keeps this manageable for most riders, which helps confidence at parking-lot speeds.
Low-maintenance final drive: Running Shaft drive (cardan) final drive cuts out the regular chain cleaning and tensioning that most bikes need.

Considerations

Carburetor fuelling: Expect to spend more time keeping the carbs in tune, especially after long storage periods or a change in altitude.

Wear Points & Servicing Notes

Carburetor maintenance

Carburetors on the EC-03 need periodic attention - pilot jets and float needles are the first parts to gum up after the bike sits, and the first thing to check if idle or throttle response degrades.

Valve clearance checks

With Single Overhead Cams (SOHC) valve gear, the EC-03 needs periodic clearance checks; caught early they're a cheap adjustment, left unchecked they accelerate valve seat wear.

Brake disc and pad wear

Braking up front comes from Double disc - solid stopping power, with disc and pad wear best checked on the same schedule as tyre changes.

Suspension condition on used examples

The EC-03's suspension runs Cartridge fork at the front. The rear uses Mono shock, Swingarm. Fork-seal condition and rear linkage play are the two things worth checking before buying used.

Final drive maintenance

The EC-03 uses shaft final drive: essentially maintenance-free day to day, with periodic gear-oil changes the only real service item.

Frame & chassis check

Built around a aluminum frame, the EC-03'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

56 kg keeps the EC-03 easy to move around in tight spaces, car parks and on the stand alike.

EC-03 - Buying & Maintenance Guide

What to check before buying

Before handing over money for a used 2011 Yamaha EC-03, cover the fundamentals: service book and oil change history, chain and sprocket wear, and any sign of oil weeping around the casings. Cold-starting it yourself tells you a lot - a healthy EC-03 should catch quickly and settle into a smooth idle.

Oil and filter changes

Nothing protects a EC-03's engine like disciplined oil changes - stay on the manufacturer's schedule (roughly every 6,000 km or annually). Match the viscosity grade to what the owner's manual specifies, not what's cheapest.

Carburetor upkeep

Deposits in the carbs are the usual culprit behind poor running on a stored EC-03 - strip and clean the float bowls before the first start. Pilot jets clog first and get overlooked most, so make a point of checking them.

Valve clearance service

Valve clearances are easy to overlook on a used EC-03 since a bike out of spec doesn't always feel obviously wrong - but the wear it causes is real. Ask the seller for documentation before assuming it's been done.

2011 Yamaha EC-03 - Frequently Asked Questions

What engine does the 2011 Yamaha EC-03 have?

The 2011 Yamaha EC-03 is powered by an Electric engine.

What is the top speed of the 2011 Yamaha EC-03?

The 2011 Yamaha EC-03 has a factory-quoted top speed of 45 km/h. Real-world speeds vary depending on rider weight, conditions and state of tune.

How much does the 2011 Yamaha EC-03 weigh?

The 2011 Yamaha EC-03 weighs 56 kg. This is the manufacturer's dry figure.

How much power does the 2011 Yamaha EC-03 make?

The 2011 Yamaha EC-03 produces 9.60 Nm @ 280 of torque.

What is the fuel tank capacity of the 2011 Yamaha EC-03?

The 2011 Yamaha EC-03 has a 14.38-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 239-287 km between stops.

Is the 2011 Yamaha EC-03 suitable for shorter riders?

The 2011 Yamaha EC-03 has a seat height of 745 mm. This is a comfortable, accessible height for most riders.

What brakes does the 2011 Yamaha EC-03 have?

The 2011 Yamaha EC-03 uses Double disc at the front and Expanding brake at the rear.

What tyre sizes does the 2011 Yamaha EC-03 use?

The 2011 Yamaha EC-03 runs 25/8-12 front and 60/100-R12 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

Yamaha EC-03 Spec Evolution

The Yamaha EC-03 was produced across 5 model years (2011-2016). 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	2012	2014	2015	2016
Wet Weight	-	284.9 kg / 628.0 lbs	89.0 kg / 196.2 lbs	-	-
Fuel Capacity	14.38 litres / 3.80 gallons	15.14 litres / 4.00 gallons	-	-	-
Bore x Stroke (in,)	3.3 x 2.5 inches	3.3 x 2.8 inches	-	-	-
Bore x Stroke (mm)	83.0 x 64.5 mm	83.0 x 71.5 mm	-	-	-
Frame Type	aluminum frame	Aluminum	Aluminum backbone	Aluminum backbone	Aluminum backbone
Wheelbase	-	1,229 mm / 48.4 in.	1,303 mm / 51.3 in.	1,080 mm / 42.5 in.	1,080 mm / 42.5 in.
Brakes - Front	Double disc	Double disc	Double disc	Expanding brake (drum brake)	Expanding brake (drum brake)
Fuel System	Carburettor. Mikuni 33mm BSR	Carburettor. Mikuni 33mm BSR	-	-	-

Key Specifications

Engine

Electric

Power

Not published by manufacturer

Torque

9.60 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 280

Top Speed

45.0 km/h / 28.0 mph

Weight

56 kg / 123.5 lbs

Fuel Capacity

14.38 litres / 3.80 gallons

Full 2011 Yamaha EC-03 Specifications

Colours White/black, Black

Warranty 6 Month (Limited Factory Warranty)

Ground Clearance (in.) 4.3 inches

Ground Clearance (mm) 110 mm

Seat Height 745 mm / 29.3 in.

Height 990 mm / 39.0 in.

Length 1,565 mm / 61.6 in.

Width 600 mm / 23.6 in.

Dry Weight 56 kg / 123.5 lbs

Fuel Capacity 14.38 litres / 3.80 gallons

Top Speed 45.0 km/h / 28.0 mph

Max Torque 9.60 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 280

Power-to-Weight Ratio 0.0336 HP/kg

Bore x Stroke (in,) 3.3 x 2.5 inches

Bore x Stroke (mm) 83.0 x 64.5 mm

Engine Type Electric

Fuel Control Single Overhead Cams (SOHC)

Fuel System Carburettor. Mikuni 33mm BSR

Compression Ratio 9.2:1

Ignition DC - CDI

Starter Electric

Clutch Engine Braking

Final Drive Shaft drive (cardan)

Gearbox Automatic

Primary Drive 2WD; Yamaha Ultramatic® V-Belt / Forward, Neut.,Rev.

Frame Type aluminum frame

Suspension - Front Cartridge fork

Suspension - Rear Mono shock, Swingarm

Lighting system Dual 30W Krypton Multi-reflector Headlights and 21/5W Brake light

Brakes - Front Diameter (in.) 3.7 inches

Brakes - Front Diameter (mm) 95 mm

Brakes - Rear Diameter (in.) 5.9 inches

Brakes - Rear Diameter (mm) 150 mm

Brakes - Front Double disc

Brakes - Rear Expanding brake (drum brake)

Tyres - Front 25/8-12

Tyres - Front 60/100-R12

Tyres - Rear 60/100-R12

Tyres - Rear 25/10-12

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