1976, 250 KH B1 replaces the 250 S1 victim of the oil crisis. The base engine
remains the same (3-cylinder 2-stroke), but the power is reduced to 26 hp
passage. The power loss was primarily due to the introduction of exhaust
systems less free and the setting of fuel.
In part against the machine adopts drein front disc.
The machine is changing every year, but only an aesthetic point of view:
in 1977, B2
in 1978, B3.
in 1979, B4
in 1980, B5.
1980 marks the end of the international career of this small 3-cylinder 2