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Yamaha YD-2 250

Make Model	Yamaha YD-2
Year	1958-60
Engine	Two stroke, piston-port, parallel twin
Capacity	247 cc / 15.0 cu-in
Bore x Stroke	54 x 54 mm
Cooling System	Air-cooled
Compression Ratio
Induction	Single carburetor
Starting	Kick
Max Power	14.5 hp @ 6000 rpm
Max Torque	4.1 kg-m @ 5000 rpm
Transmission	5 Speed
Final Drive	Chain
Front Suspension	Telescopic forks
Rear Suspension	Swing arm
Front Brakes	Drum
Rear Brakes	Drum
Front Tyre	2.50 -16
Rear Tyre	2.50 -16
Wet Weight	138 kg / 309 lbs
Fuel Capacity

A Brilliant Dynasty

Yamaha was a fast learner and, within a few years, its twin had cast off all traces of its origins and had given rise to a motorcycle dynasty.

The first was the electric start YD2. then came the first dedicated sports models, the YDS1 and the YDS2 (the first model exported to Europe). Yamaha competed in its first French GP at Clermont-Ferrand in 1961 and returned in 1963 with a succession of famous riders - Vesco, Read, Redman, Ivy, Saarinen, and Agostini.