YAMAHA YR1
| Production Year: | 1967, 1968, 1969, 1970 |  |
| Type: | Twin cylinder, two stroke, air cooled |
| engine specs | |
| Type | Twin cylinder, two stroke, air cooled |
| Displacement | 347 cm3 |
| Bore X Stroke | 2.4x2.3 in OR 61 mm |
| Compression Ratio | 7.5:1 |
| Horsepower | 36.5/7500 KW(hp)/RPM |
| Torque | 23.9/7000 lb-ft/RPM OR 32/7000 Nm/RPM |
| Fuel System | Carburetor |
| transmission specs | |
| Gearbox | 5-Speed |
| Clutch | Wet multi-plate |
| Final Drive | Chain |
| chassis specs | |
| Front Brake | Drum |
| Rear Brake | Drum |
| dimension specs | |
| Overall Length | 81.1 in OR 2060 mm |
| Overall Width | 28.9 in OR 734 mm |
| Ground Clearance | 5.7 in OR 145 mm |
| Weight | 346 lbs OR 157 kg |
| Fuel Capacity | 4 gallons OR 15.1 L |
| Wheelbase | 52.6 in OR 1336 mm |
| tyres specs | |
| Front | 3.00-18 |
| Rear | 3.50-18 |
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