Yamaha YDS-7 (1972) technical specifications

Yamaha YDS-7 is produced in 1972. Engine is Two stroke, piston-port, parallel twin, displacement 247 cc / 15.0 cu-in , produces power 30 hp @7500 rpm and 21 ftlb @ 7000 rpm. Yamaha YDS-7 wet weight is 145 kg / 320 lbs. Yamaha YDS-7 has 4 photos.

Technical specifications

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Model:	YDS-7
Years:	1972
Engine:	Two stroke, piston-port, parallel twin
Capacity:	247 cc / 15.0 cu-in
Bore x Stroke:	54 x 54 mm
Compression Ratio:	7.5;1
Cooling System:	Air-cooled
Induction:	26mm Mikuni
Ignition:	Mitsubishi contact breaker
Starting:	Kick
Max Power:	30 hp @7500 rpm
Max Torque:	21 ftlb @ 7000 rpm
Clutch:	Wet, multi-plate clutch mounted on left side of crankshaft
Transmission:	5 Speed Helical-gear primary drive. Rear chain % x %in with top guard. Engine rpm at 30 mph in top gear, approximately 2,500.
Final Drive:	Chain
Front Suspension:	34mm Telescopic forks
Rear Suspension:	Twin shock
Front Brakes:	180mm twin leading shoe drum
Rear Brakes:	180mm single leading shoe
Front Tyre:	300 x 18
Rear Tyre:	3.25 x 18
Wheelbase:	1300 mm / 51.1 in
Wet Weight:	145 kg / 320 lbs
Fuel Capacity:	11.4 Litres / 3.0 gal