Yamaha R5-B
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| Yamaha R5-B | |
| Manufacturer | |
|---|---|
| Production | 1971 |
| Class | Classic |
| Engine | Parallel twin cylinder, two stroke, air-cooled |
| Bore / Stroke | 63.5mm x 63.5mm |
| Compression ratio | 7.5:1 |
| Horsepower | 35.94 HP (26.8 KW) @ 7000RPM |
| Torque | 28.03 ft/lbs (38.0 Nm) @ 6500RPM |
| Transmission | Gear box: 5-Speed Final Drive: Chain |
| Suspension | Front: Telescopic fork Rear: Swingarm |
| Brakes | Front: Drum, twin leading shoe Rear: Drum, single leading shoe |
| Front Tire | 3.00-18 |
| Rear Tire | 3.50-18 |
| Wheelbase | 52.8 inches (1341 mm) |
| Width | 29.09 inches (739 mm) |
| Seat Height | 31.1 inches (790 mm) |
| Weight | 154.0 kg (wet) |
| Recommended Oil | Yamalube 10w-40 |
| Manuals | Service Manual |
The Yamaha R5-B was a Parallel twin cylinder, two stroke, air-cooled Classic motorcycle produced by Yamaha in 1971. Max torque was 28.03 ft/lbs (38.0 Nm) @ 6500 RPM. Claimed horsepower was 35.94 HP (26.8 KW) @ 7000 RPM.
Engine[edit | edit source]
A 63.5mm bore x 63.5mm stroke result in a displacement of just 348.0 cubic centimeters.
Drive[edit | edit source]
The bike has a 5-Speed transmission. Power was moderated via the Wet multi-plate.
Chassis[edit | edit source]
It came with a 3.00-18 front tire and a 3.50-18 rear tire. Stopping was achieved via Drum, twin leading shoe in the front and a Drum, single leading shoe in the rear. The front suspension was a Telescopic fork while the rear was equipped with a Swingarm. The wheelbase was 52.8 inches (1341 mm) long.
1971 - 1973 Yamaha R5-B[edit | edit source]
After a number of minor improvements like change color, directional signals front and rear and a bigger, brighter stoplight, Yamaha launches the R5-B 350 cc. The Yamaha R5 350 was in many respects the crown jewel of Yamaha’s continuing 2-stroke program. While it put out the same 36hp as the previous year’s twin, an increase in torque and other refinements meant it easily boasted the best performance of any 2-stroke Yamaha had ever made.