September 1988
Yamaha BW's shown at Tokyo Motor Show for the Japanese market.
1990
BW's for the first time on sale in Europe under the names of BW's for Yamaha brand, and Booster for MBK brand.
April 1994
First model evolution named BW'S R. It offers a hydraulic front fork with a front disc brake and aluminium 6-spoke wheels replace former steel wheels. Street type tyres replace the knobbly off-road tyres. Transmission has been improved and a lock-attachment ring welded to the frame.
