Yamaha BW's from 2004: History
The Yamaha BW's 50cc scooter was introduced to the European market in the late 80s. The small scooter was developed by Yamaha and called BW's, English for "Big Wheels". Since the French manufacturer MBK was bought by Yamaha at about the same time, the scooter was produced in France and sold under both brands and simply renamed Booster at MBK. To complicate matters a bit more, the model was marketed in many countries as Yamaha Zuma.
From 1989 to 1999, the basic version of the scooter was sold with 10-inch wheels and dual drum brakes. Some special versions had front disc brakes from 1994, and from 1999 all versions had front disc brakes.
There were also some versions with 12-inch wheels.
Yamaha also offered a low-cost version after 2013, the so-called Easy.
Yamaha BW's 50 2004: Engine
Yamaha BWs scooters are equipped with a Minarelli engine. The engine is light, compact and shows excellent acceleration.
- Minarelli vertical single-cylinder 2-stroke engine
- Displacement: 49 ccm
- Bore x stroke: 40x 39.2mm
- Standard: Euro 2
- Power: 3.7 hp at 6600 rpm
- Lubrication: Auto-lube (1 liter tank)
- Intake: 12mm carburetor and reed valve
- E-starter + kick starter
- Transmission: CVT with V-belt
- CVT rollers: 15x12mm
BW's 2004: Chassis
The chassis of Yamaha BW's was designed for city traffic, but is pretty versatile thanks to the relatively large wheels. It is a compact 50cc scooter that is extremely light and maneuverable. The scooter is quite small and that is also why it is very popular among teenagers.
- Tubular steel frame
- Telescopic fork, 70 mm travel
- Monoshock absorber, 70 mm travel
- Front tire 120/90-10
- Rear tire 130/90-10
- Aluminum rims
- Front brake: 180mm disc / 110mm drum on Easy version
- Rear brake: 110mm drum
- Overall length: 1740mm
- Handlebar width: 665mm
- Seat height: 768mm
- Ground clearance: 125mm
- Weight, dry: 76kg
- Fuel tank: 5,3L
Yamaha BW's Original: Standard or Tuning
The performance of BW's is restricted from the factory, you can maintain the performance by regular maintenance or turn the scooter into a small racer by upgrading it with performance parts.
Since Minarelli engines are so popular, we can offer you cylinders for all tuning levels, reinforced crankshafts , ignitions, exhausts, CVTs and many other tuning parts.
We also carry numerous tuning and spare parts for chassis and customizing, such as fairings, brake discs and brake pads, levers, handlebars, indicators, etc.
