Yamaha RD 500 LC

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Yamaha
RD500.jpg
Yamaha RD 500 LC
Yamaha RD 500 LC
Manufacturer Yamaha
Production period 1984 to 1987
class motorcycle
design type Super athlete
Motor data
4 cylinder, two-stroke engine
Displacement  (cm³) 499
Power  (kW / PS ) 65/88
Torque  ( N m ) 67
Top speed (  km / h) 223
transmission Foot-shifted six-speed gearbox, multi-disc clutch in an oil bath
drive Chain drive with open roller chain
Brakes Front: internally ventilated double disc brake, Ø 267 mm.
Rear: internally ventilated disc, Ø 245 mm
Wheelbase  (mm) 1375

The Yamaha RD 500 LC was a motorcycle from the Japanese manufacturer Yamaha .

history

After the success of the racing motorcycles with the designation “YZR 500”, Yamaha developed the “RD 500 LC” as the only series-produced motorcycle with a four-cylinder two-stroke engine. The model was the type "OW61", which was used in the 1982 motorcycle world championship with the newly developed V4 engine in the 500 cm³ class by Kenny Roberts sr. was used.

When it was launched, it was the most powerful mass-produced two-stroke engine; it was only outbid by the Suzuki RG 500 Gamma at the end of 1984 . The price was given in 1984 at 11,188 DM.

technology

engine

The engine was designed as a 50 ° V engine with two crankshafts. The inlet after the 26 millimeter carburetor for each crankcase was controlled by diaphragm valves .

On each of the four cylinders there was a roller in the exhaust port that was rotated by a servomotor via cables to control the exhaust gas flow. This as " Y Amaha P ower V alve S ystem" (short YPVS ) designated system was often together with the type designation of the RD 500 used and caused an increase in torque at low speeds.

An electric starter was not planned - the RD 500 LC was started with a classic kick starter.

landing gear

Rear view of the RD 500 LC

In the export markets, Yamaha used a steel frame made of square profiles. The typically small 16 "front wheel was guided by a telescopic fork with a stanchion tube diameter of 37 mm. The hydraulic pressure of the front brake system controlled a so-called" anti-dive "device, which was supposed to limit the front section from immersing when braking.

literature

Web links

Commons : Yamaha RD 500 LC  - Collection of pictures, videos and audio files
  • Michael Pfeiffer: Yamaha RD 500 LC. In: Finale. Motorrad online , August 19, 2010, accessed on December 16, 2016 : "Even normal motorcyclists could feel like King Kenny Roberts."
  • Gerhard Eirich: Yamaha RD 500 LC. In: used advice. MOTORRAD online, September 9, 1998, accessed on December 16, 2016 (the “OW 71” mentioned did not exist).

Individual evidence

  1. ^ Revolution . New V4 factory machine from Yamaha. In: motorcycle . No.  9 . Motor Presse Stuttgart , Stuttgart 1982, p. 304–307 ( http://www.motorradonline.de/sixcms/media.php/53/MRD09_1982_V4-Werksmaschine-von-Yamaha.pdf Online [PDF; 1.1 MB ; accessed on December 16, 2016]).
  2. ↑ Technical data: Yamaha RD 500. (No longer available online.) In: Yamaha RD 500 Bj. 1984, Yamaha YZF-R6 (VT: old against new). MOTORRAD online, August 24, 2004, formerly in the original ; accessed on December 14, 2016 : "Progress is another world"
  3. ↑ Yamaha Technologie 1980: YPVS (Yamaha Power Valve System). In: Design Cafe. Yamaha, April 15, 2009, accessed December 16, 2016 .