![]()
No images available
Tap to enlarge
![]()
2011 Yamaha BWs Overview
The 2011 Yamaha BWs is a scooter motorcycle built around 49.20 cc of displacement. Under the tank sits a Single cylinder, two-stroke engine running SOHC valve actuation, a compression ratio of 7.2:1. The bore and stroke measures 40 x 39.2 mm. 2011 Yamaha BWs delivers 3.60 Nm @ 6000 of torque. From a practical standpoint, the 2011 BWs tips the scales at 82 kg, carries a 5.30-litre fuel tank, offers a seat height of 768 mm and spans a 1,172 mm wheelbase. That's roughly 103.9 kg lighter than the average scooter motorcycle in our database. Scroll down for the complete 2011 Yamaha BWs spec sheet covering every technical detail from suspension travel to tyre sizes.
2011 BWs - Pros & Cons
Strengths
-
⚙️
Low-maintenance final drive: Belt final drive means no chain to clean, lube or adjust - meaningfully less routine maintenance than a chain-driven equivalent.
Considerations
-
🔧
Carburetor fuelling: Carbureted engines need occasional jetting attention and can be reluctant in cold weather or at altitude compared to modern fuel-injected alternatives.
-
⛽
Modest fuel capacity: The 5.30-litre tank means more frequent fuel stops on longer rides, which is worth planning around on touring routes.
Wear Points & Servicing Notes
Carburetor maintenance
The BWs uses carburetion rather than fuel injection, which means jetting is altitude- and temperature-sensitive and benefits from a clean-and-rejet after extended storage or an exhaust change.
Valve clearance checks
SOHC valve actuation on the BWs means clearances should be checked at the manufacturer's specified interval - they can tighten as mileage accumulates, and a light top-end tick is usually the first sign.
Brake disc and pad wear
The Single disc front brake gives strong, progressive stopping power. Disc thickness and pad depth are worth checking at every tyre change, since worn pads can score the disc surface.
Suspension condition on used examples
Up front, the BWs runs Telescopic fork and Unit swing at the rear. On a used example, check fork seals for weeping oil and test the rear linkage for play - seals are a relatively cheap fix but useful when negotiating price.
Final drive maintenance
Final drive is by belt - lower maintenance than chain with no lubrication needed, but tension and tooth wear should still be checked at service intervals.
Frame & chassis check
The frame is Steel - worth a visual check for corrosion or impact damage around the head-stock and swingarm pivot on any used example, since frame damage is far costlier to fix than any service item.
Low-speed handling
At just 82 kg, the BWs is light enough to manhandle easily at a standstill - one of the practical advantages of its class.
BWs - Buying & Maintenance Guide
What to check before buying
When inspecting a used 2011 Yamaha BWs, start with the basics: check the service book for oil change frequency, inspect the chain and sprockets for wear, and look for oil seepage around the engine casings and rocker covers. A cold start test is invaluable - a well-maintained BWs should fire up cleanly and settle to a smooth idle within a few seconds.
Oil and filter changes
Regular oil changes are the single most important maintenance task on any BWs. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. Always use the correct viscosity grade as specified in the owner's manual.
Carburetor upkeep
Keep the carburetors clean and free of deposits. If the BWs has been stored, strip and clean the carb float bowls before attempting to start it. Pilot jets are the first to block and the last to be checked - always include them in any carb rebuild.
Valve clearance service
Check that valve clearances have been adjusted at the correct intervals on any used BWs. A bike with clearances out of spec doesn't always feel obviously wrong - but tight clearances accelerate valve seat wear. Ask for service documentation proving it's been done.
2011 Yamaha BWs - Frequently Asked Questions
What engine does the 2011 Yamaha BWs have?
The 2011 Yamaha BWs uses a Single cylinder, two-stroke engine with 49.20 cc of displacement.
How much does the 2011 Yamaha BWs weigh?
The 2011 Yamaha BWs weighs 82 kg. This is the manufacturer's wet figure.
How much power does the 2011 Yamaha BWs make?
The 2011 Yamaha BWs produces 3.60 Nm @ 6000 of torque.
What is the fuel tank capacity of the 2011 Yamaha BWs?
The 2011 Yamaha BWs has a 5.30-litre fuel tank. At around 5-6 litres per 100 km, that is roughly 88-105 km between stops.
Is the 2011 Yamaha BWs suitable for shorter riders?
The 2011 Yamaha BWs has a seat height of 768 mm. This is a moderate seat height that suits a wide range of rider heights.
What brakes does the 2011 Yamaha BWs have?
The 2011 Yamaha BWs uses Single disc at the front and Expanding brake at the rear.
What tyre sizes does the 2011 Yamaha BWs use?
The 2011 Yamaha BWs runs 120/90-10 front and 150/80-10 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
Yamaha BWs Spec Evolution
The Yamaha BWs was produced across 7 model years (2006-2012). 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 |
2006 |
2007 |
2008 |
2009 |
2010 |
2011 |
2012 |
| Dry Weight |
75 kg / 165.3 lbs |
75 kg / 165.3 lbs |
75 kg / 165.3 lbs |
- |
- |
230 kg / 507.0 lbs |
- |
| Engine Type |
Single cylinder |
Single cylinder |
Single cylinder |
Single cylinder |
Single cylinder, two-stroke |
Single cylinder, two-stroke |
Single cylinder, two-stroke |
| Fuel Control |
- |
- |
- |
- |
- |
SOHC |
Single Overhead Cams (SOHC) |
| Displacement (ci) |
2.99 cubic inches |
2.99 cubic inches |
3.00 cubic inches |
3.00 cubic inches |
3.00 cubic inches |
3.00 cubic inches |
3.00 cubic inches |
| Displacement (cc) |
49.00 cc |
49.00 cc |
49.20 cc |
49.20 cc |
49.20 cc |
49.20 cc |
49.20 cc |
| Bore x Stroke (mm) |
67.0 x 55.7 mm |
40.0 x 39.2 mm |
- |
40.0 x 39.2 mm |
40.0 x 39.2 mm |
40.0 x 39.2 mm |
40.0 x 39.2 mm |
| Bore x Stroke (in,) |
2.6 x 2.2 inches |
1.6 x 1.5 inches |
- |
1.6 x 1.5 inches |
1.6 x 1.5 inches |
1.6 x 1.5 inches |
1.6 x 1.5 inches |
| Frame Type |
Front suspension system |
- |
- |
- |
- |
Steel |
- |
Key Specifications
Engine
Single cylinder, two-stroke
Power
Not published by manufacturer
Torque
3.60 Nm (0.4 kgf-m or 2.7 ft.lbs) @ 6000
Top Speed
Not published by manufacturer
Weight
82.0 kg / 180.8 lbs
Fuel Capacity
5.30 litres / 1.40 gallons
Advertisement
Full 2011 Yamaha BWs Specifications
Colours
Black, white, blue
Warranty
6 Month (Limited Factory Warranty)
Ground Clearance (mm)
124 mm
Ground Clearance (in.)
4.9 inches
Seat Height
768 mm / 30.2 in.
Wheelbase
1,172 mm / 46.1 in.
Height
1,049 mm / 41.3 in.
Length
1,685 mm / 66.3 in.
Width
1,085 mm / 42.7 in.
Dry Weight
230 kg / 507.0 lbs
Fuel Capacity
5.30 litres / 1.40 gallons
Wet Weight
82.0 kg / 180.8 lbs
Fuel Control
SOHC
Engine Type
Single cylinder, two-stroke
Displacement (ci)
3.00 cubic inches
Displacement (cc)
49.20 cc
Bore x Stroke (mm)
40.0 x 39.2 mm
Bore x Stroke (in,)
1.6 x 1.5 inches
Fuel System
Carburettor
Compression Ratio
7.2:1
Engine Lubrication
Separate lubrication
Ignition
CDI
Starter
Electric & kick
Clutch
Engine Braking
Final Drive
Belt
Gearbox
Automatic
Primary Drive
2WD; Yamaha Ultramatic® V-Belt / Forward, Neut.,Rev.
Frame Type
Steel
Suspension - Front
Telescopic fork
Suspension - Rear
Unit swing
Wheel Travel - Front
70 mm / 2.8 in.
Wheel Travel - Rear
70 mm / 2.8 in.
Lighting system
Dual 30W Krypton Multi-reflector Headlights and 21/5W Brake light
Brakes - Front Diameter (in.)
7.1 inches
Brakes - Front Diameter (mm)
180 mm
Brakes - Rear Diameter (in.)
4.3 inches
Brakes - Rear Diameter (mm)
110 mm
Brakes - Front
Single disc
Brakes - Rear
Expanding brake (drum brake)
Tyres - Front
120/90-10
Tyres - Rear
150/80-10
Specifications are compiled from manufacturer documentation and cross-referenced
technical sources, and corrected on an ongoing basis.
Spot an error? Let us know.
Advertisement