Yamaha SRX
Encyclopedia
The Yamaha SRX is a motorcycle
Motorcycle
A motorcycle is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.Motorcycles are one of the most...

 that was manufactured from 1985 to 1997 by the Yamaha Motor Company
Yamaha Motor Company
, is a Japanese motorized vehicle-producing company. Yamaha Motor is part of Yamaha Corporation and its headquarter is located in Iwata, Shizuoka. Along with expanding Yamaha Corporation into the world's biggest piano maker, then Yamaha CEO Genichi Kawakami took Yamaha into the field of motorized...

.

In an attempt to repeat the success of the SR500
Yamaha SR500
The Yamaha SR500 is a popular thumper. It first started production in 1978, as a road-going version of the popular Yamaha XT500. It experienced good sales throughout the US, Europe and Australia. The SR500 is no longer sold in any market worldwide, but its sister bike, the SR400, was manufactured...

, Yamaha placed a more modern engine derived from the XT600 into a light, sporty street bike. While still being an air-cooled, overhead-camshaft single-cylinder like its predecessor, the new engine featured a four-valved cylinder head, a two-staged carburetor, a balance shaft, and various improvements. The chassis was a lightweight steel frame with alloy wheels, a double disc brake on the front- and a single disc brake on the rear wheel.

However, unlike its cheaper predecessor, the SRX600 did not compete well on the international market. Nimble handling, light weight, and unique styling did not compete well with the heavier, faster multi-cylinder bikes available for not much more money. Still, Yamaha claims to have sold 19,000 units of the SRX. In the USA, the SRX was officially sold only in 1986; in Germany, sales continued until 1990

Japanese models

In Japan, the SRX was sold with a reduced displacement of 400 cc for tax reasons, or 608 cc. Also, these models featured an oil cooler. From 1988, the 2NX model was sold, which featured a 17-inch front wheel and single 320 mm brake disc. There was also an SRX 250 on the Japanese market, although this differed somewhat in the presence of a headlight fairing and electric start.
When the international marketing of the SRX stopped, in Japan there was a new production line 3VN; it received an engine derived from the newer XT600E, equipped with an electrical starter. Also, the classical twin-shock configuration was dropped for a mono shock design. This bike was produced until 1997, when production ceased. The SRX was outlived by its predecessor - the SR400 was still available in 2010.

Engine

  • Displacement: 595 cc
  • Bore and Stroke: 94.0 x 84.0 mm
  • Compression Ratio: 8.5:1
  • Maximum Torque: 34 ft.lbf @ 5500 rpm
  • Maximum HP: 40 hp @ 5700 rpm
  • Carburetion: 2KY27PV
  • Transmission: 5 Speed

Chassis

  • Wheelbase: 1.38 metre
  • Ground Clearance: 15 centimetres
  • Seat Height: 77 centimetres
  • Dry Weight: 149 kg
  • Wet Weight: 170 kg
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