Yamaha BW's Bump: History
The MBK Booster is a very popular scooter especially in France and identical to the Yamaha BW's. It 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.
The Bump version had two aims: on the one hand, to provide the simple 50cc scooter with additional options and, on the other, to respond to the trend towards offroad scooters that emerged in the mid-1990s. It has cross tires, a headlight grille, an extended front mudguard, handguards and a special fork.
Booster TRack: Engine
The Booster is equipped with a Minarelli engine. The engine is light, compact and shows excellent acceleration.
- Minarelli vertical single-cylinder 2-stroke engine
- Air-cooled
- Bore x stroke: 40 x 39.2 mm
- Displacement: 49cc
- Intake: 12 mm carburetor reed valve
- Electronic ignition
- Drive: CVT with V-belt
- Announced power: 5.9cv
- Autolube (1.3L oil tank)
- CVT weights: 15x12mm
Yamaha Bump: Chassis
The chassis of MBK Booster / 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 younger people.
- Tubular steel frame
- Front wheel suspension: Telescopic fork
- Suspension travel: 80 mm
- Rear suspension: Adjustable shock absorber
- Suspension travel: 70mm
- Front brake: Disc brake, 190mm
- Rear brake: Drum brake, 110mm
- Front tire: 120/90-10
- Rear tire: 130/90-10
- Seat height: 81cm
- Ground clearance: 14.2cm
- Length: 1.74cm
- Dry weight: 74kg
- Fuel tank: 6,3L
BWs Bump: Standard or Tuning
The performance of Booster / 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.
