The YZ 490 K, used in 1982, had retained air cooling, but the engine was so flexible that the number of gears had been reduced from five to four. Its mechanical simplicity and its very light tubular frame allowed the 490 to weigh only 102 kg.
Single cylinder 2 t air-cooled - 487 cm3 (87 x 82 mm) - 60 hp/7,000 rpm - Distribution via the piston skirt - Reed valve intake - Carb Ø 38 mm - Electronic ignition - Lubrication by mixture - Engine block - 4-speed gearbox - Tubular frame - Front suspensions. telescopic, rear. oscillating monoshock controlled by rods - Travel 300/320 mm - Drum brakes - Front tyres. 21", rear 18" - 102 kg.
Pictures via : Ruote da Sogno
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