Yamaha SR500

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Yamaha SR500
Yamaha SR 500.jpg
2003 Yamaha SR500
Manufacturer Yamaha Motor Company
Parent company Yamaha Corporation
Production 1978−1999
Assembly Iwata, Shizuoka, Japan
Predecessor XT500[1]
Successor SR400[1]
Class Standard
Engine 4-stroke 499 cc air-cooled, SOHC, single-cylinder, 2-valve[1]
Bore / stroke 87 mm × 84 mm (3.4 in × 3.3 in)[2]
Compression ratio 9.0:1[2]
Top speed 146 km/h (91 mph)[3]
Power 23.5 kW (31.5 hp) @ 6,500 rpm[1]
Torque 36.3 N·m (26.8 lbf·ft) @ 5,500 rpm[1]
Ignition type CDI[2]
Transmission 5-speed manual[2]
Frame type Half-duplex cradle[2]
Suspension

F: 35 mm telescoping fork, 150 mm (5.9 in) travel

R: 105 mm (4.1 in) travel, 5-way adjustable preload[4]
Brakes Hydraulic disc or mechanical drum, depending on model year[5]
Tires F: 3.50-19 or 3.50-18
R: 4.00-18[3]
Rake, trail 27.5 deg, 117 mm (4.6 in)[2]
Wheelbase 1,405 mm (55.3 in)[4]
Dimensions L: 2,105 mm (82.9 in)
W: 845 mm (33.3 in)
H: 1,155 mm (45.5 in)[1]
Seat height 810 mm (32 in)[4]
Weight 158 kg (348 lb)[1] (dry)
Fuel capacity 12 or 14 litres (2.6 or 3.1 imperial gallons; 3.2 or 3.7 US gallons)[3][5]
Oil capacity 2.4 litres (2.5 US quarts)[2]
Fuel consumption 4.8 L/100 km (59 mpg-imp; 49 mpg-US)[4]
Yamaha SR500
Modified 1985 Yamaha SR500 café racer
Yamaha SR400 at the 2009 Tokyo Motor Show

The Yamaha SR500 is a single-cylinder motorcycle manufactured in Japan by Yamaha Motor Company and marketed from 1978-1999 in Asia and Oceania (1978-1981 in North America; 1978-1983 in Europe) — as a street version of the Yamaha XT500 with a standard riding posture and styling resembling the Universal Japanese Motorcycle (UJM) of the 1960s and 1970s.

History[edit]

Prior to formal marketing, Yamaha presented a pre-production prototype to US dealers in the autumn of 1975.[6][7][8][9]

Regarding the bike's styling, designer Atsushi Ishiyama said: "Our choice was to design the new SR 500 with a strong family image and a strong link to our first four stroke, the XS 650 twin, which was also inspired by British design."[10]

The 1978-1979 U.S. version of the SR500 had front and rear disc brakes while the 1980-1981 models had a front disc and rear drum brake. Cast aluminum wheels accepting tubeless tires were standard equipment on all US models (1978-1981)[11][vague] By the end of 1981, the SR500 was discontinued in the US market, while continuing in Europe and Japan. The model ended production in 1999.[12][13]

The SR500 employed a slightly modified version of its large single-cylinder from the XT500/TT500[14][15] and had electronic ignition as well as an automatic compression release to make kick starting much easier.[12][16][17]

SR400[edit]

From 1978 to the present Yamaha has marketed a variant of the SR500 in Japan, the SR400 — with a hiatus from 2008 to 2009. Yamaha reintroduced the SR400 in 2010 with Fuel injection and a catalyst muffler to pass the tighter emission restrictions. The SR400 is essentially the same bike[citation needed] as the SR500 with a different crankshaft and a shorter piston stroke. [18][12]

In early 2014, Yamaha announced that the SR400 would be released in the United States as a 2015 model. The 2015 SR400 was released in the U.S. in June 2014.

References[edit]

  1. ^ a b c d e f g "1978 SR500". Corporate Information. Yamaha Motor Co., Ltd. Retrieved 17 July 2013. "The SR500 was a model that brought the know-how of the 4-stroke enduro model XT500 to an on-road sport model." 
  2. ^ a b c d e f g "SR500 2J2 Specifications". Dropbears.com. Retrieved 18 July 2013. 
  3. ^ a b c "Yamaha SR 500 1978 Specs and Photos". motoprofi.com. Retrieved 17 July 2013. 
  4. ^ a b c d "Yamaha SR 500 1999 Specs and Photos". motoprofi.com. Retrieved 17 July 2013. 
  5. ^ a b "Classics: SR500: Model Evolution". Yamaha Design Cafe English. Yamaha Motor Europe. 1 March 2003. Retrieved 18 July 2013. "Major Model Changes from 1978 until 1999." 
  6. ^ Seigal, Margie (November–December 2008). "The Yamaha TT500". Motorcycle Classics. Retrieved 18 July 2013. "The SR500 quickly became a cult item, with Japanese and American aftermarket manufacturers producing go-faster parts and cosmetic disguises intended to turn the Yamaha into a Velocette or BSA Gold Star clone." 
  7. ^ Youngblood, Ed (2 December 2004). "The Elegant ESO". Ed Youngblood's Motohistory. MotoHistory.net. Retrieved 21 July 2013. "The Iron Curtain answer to the big singles of the West was the Czech-built ESO." 
  8. ^ "ESO 500cc Moto-Cross – 1959". The Early Years of Motocross Museum. Retrieved 21 July 2013. "The engine, the masterpiece of the ESO, was well ahead of its time in terms of engineering." 
  9. ^ "Classic Motocross Iron: 1959 ESO 500 Scrambler". Motocross Action Magazine. Retrieved 21 July 2013. "Though the engine was originally designed by Simandl for speedway (and was an exact copy of a British JAP), Simandl designed the S45 motocross engine (named for its actual horsepower output) on the then-new unit construction concept in 1957." 
  10. ^ "They did it their way: When the big thumper returned". Yamaha Design Cafe English. Yamaha Motor Europe. 1 March 2003. Retrieved 18 July 2013. "The times in the sixties where big singles touched the heart of enthusiasts were not forgotten!" 
  11. ^ 1978-1981 Yamaha SR500 sales brochures
  12. ^ a b c Siegal, Margie (March–April 2006). "1980 Yamaha SR500". Motorcycle Classics. Retrieved 18 July 2013. "Durable and easy to maintain, the Yamaha SR500 became a cult favorite among classic motorcycle fans." 
  13. ^ Smith, Jerry (8 April 2013). "2013 Yamaha SR400 Anniversary Edition". Motorcyclist Online. Retrieved 17 July 2013. "Yamaha's SR500, a modern incarnation of the legendary British singles of old, debuted in the U.S. in 1978, but slunk off the stage a few years later, thanks to the riding public's apathy toward a slow, vibey bike that required a master's degree in kickology to start." 
  14. ^ "Highway Motorcycles -- Exhaust Emission Standards". Office of Transportation and Air Quality. US Environmental Protection Agency. Retrieved 21 July 2013. 
  15. ^ index.php?title=California:_Motorcycles:_Emissions "California: Motorcycles: Emissions". Transportpolicy.net. Retrieved 21 July 2013. 
  16. ^ "Product Planner Profile: Masahiro Inumaru". Yamaha Design Cafe English. Yamaha Motor Europe. 1 April 2002. Retrieved 18 July 2013. "His first project was the SR 500 and the TT500." 
  17. ^ "SR500 (1978)". Yamaha Community (in French). Yamaha Motor France. 20 April 2011. Retrieved 18 July 2013. 
  18. ^ "Another Japanese Gem - The Yamaha SR400 (SR500)". Return of the Cafe Racers. September 2007. Retrieved 17 July 2013. "Aesthetically the bike hasn't changed much since its conception and as such oozes retro classic appeal in todays market."