MBK Booster before 2004: a little background
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.
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.
MBK Booster until 2004: 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
- Displacement: 49cc
- Bore x stroke: 40x 39,2mm
- Standard: Euro 2 from 1999
- Power: 5,8HP at 6600 rpm
- Torque: 4,9N.m
- Lubrication: Auto-lube (1L tank)
- Intake: 12mm carburetor and reed valve
- Electric starter + kickstarter
- Transmission: CVT with V-belt
Booster and BW's before 2004: 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 teenagers.
- Tubular steel frame
- Telescopic fork, 70 mm travel
- Mono shock absorber, 70 mm travel
- Front tire 120/90-10
- Rear tire 130/90-10
- Rims: Steel until 1999, aluminum after 1999
- Front brake: 110mm drum brake until 1998 / 180mm disc brake after 1999 (except special series)
- Rear brake: 110mm drum brake
- Total length: 1740mm
- Handlebar width: 665mm
- Seat height: 745mm
- Ground clearance: 125mm
- Dry weight: 70kg
- Fuel tank: 4,6L
MBK Booster before 2004: Original 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..
