Yamaha YZR500
Manufacturer | Yamaha Motor Company |
---|---|
Production | 1973 - 2002 |
Predecessor | Yamaha YZ634A |
Successor | Yamaha YZR-M1 |
Engine | 500 cc two-stroke |
The YZR500 was the Yamaha Motor Corporation’s entry for 500cc Grand Prix motorcycle racing between the years of 1973 and 2002.
Successes
Riders who rode it to world championships are Giacomo Agostini (1975), Kenny Roberts (1978, 1979, 1980), Eddie Lawson (1984, 1986, 1988) and Wayne Rainey (1990, 1991, 1992).
Phillip McCallen won the Macau Grand Prix in 1996.
Chronology
Year | Model | Constructor's championship |
---|---|---|
1973 | OW20: Liquid-cooled, inline-4, two-stroke engine, chromoly frame. Yamaha’s first 500cc factory bike won from the outset at the first round of the 1973 season, ridden by Jarno Saarinen. | 2nd |
1974 | OW23: Yamaha’s first machine created specifically for 500cc racing. Yamaha won their first 500cc constructor’s championship with it and in 1975 Giacomo Agostini rode the revised OW26 to a world championship as well as giving Yamaha their second 500cc constructor’s championship. | 1st |
1975 | 1st | |
1976 | 2nd | |
1977 | OW35: Changes were made to the valve intake system, stroke ratio, and carburator. | 2nd |
OW35K: Introduction of Yamaha’s Power Valve System (YPVS). Kenny Roberts won his first of three championships with it. | ||
1978 | 2nd | |
1979 | OW45 | 2nd |
1980 | OW48: Introduction of an aluminum frame to the YZR500. | 2nd |
OW48R: At round 4 of the season, the YZR500 returned to a steel frame, and the engine had the outer cylinders reversed and thus rear-directional exhaust. | ||
1981 | OW53: Same rear-directional exhaust as the OW48R, and the aluminum frame used a squared cross-section. Last inline-4 YZR500. | 2nd |
OW54: Square-4 engine, rotary disc valve. | ||
1982 | OW60 | 2nd |
OW61: The first V4 engine in a 500cc Grand Prix motorcycle. Also had a new frame structure that was the basis for the Deltabox frame, which was developed by Spanish engineer Antonio Cobas.[1] | ||
1983 | OW70: Introduction of the aluminum Deltabox frame and designed specifically for a 17-inch front wheel (from 18 inches). | 2nd |
1984 | OW76: Crankcase reed valve system. Eddie Lawson wins the rider championship with it. | 2nd |
1985 | OW81: Re-designed V-4 engine. Eddie Lawson won the rider's championship with it. | 2nd |
1986 | 1st | |
1987 | OW86: Improvements to the exhaust and cooling systems. | 1st |
1988 | OW98: A new exhaust layout of both pipes going under the engine and out the right side required an asymmetrical swingarm. Eddie Lawson won the rider's championship on it. | 1st |
1989 | OWA8: Introduction of a data-recording device. | 2nd |
1990 | OWC1: Wayne Rainey won his first rider's championship on it. | 1st |
1991 | OWD3: New regulation came into effect: the minimum weight would be 131 kg (for the four cylinders bikes). Yamaha used in this year first (and last) chip controlled suspension (CES). | 1st |
1992 | OWE0: In the latter-half of the season, Yamaha introduced their own "big-bang" firing order to the YZR500. Third championship for Wayne Rainey. | 2nd |
1993 | OWF2: An extruded aluminum frame was designed to resist flex from increased power output, though Wayne Rainey complains that it is too stiff, and in round 8 Rainey switches to a chassis used by Team ROC. | 1st |
1994 | OWF9: Re-design of the fairing and introduction of ram-air intake. | 3rd |
1995 | 3rd | |
1996 | OWJ1: New alloy for the engine and new design for the frame. | 2nd |
1997 | OWH0: The "V" was widened to allow a larger air box. The OWJ1 and OWH0 were developed simultaneously and used in reverse order during the season. | 2nd |
1998 | OWK1: Move to unleaded fuel. | 2nd |
1999 | 2nd | |
2000 | OWK6: General improvements to the engine, frame and cowl. | 1st |
2001 | OWL6 | 2nd |
2002 | OWL9: The 28th and last generation of the YZR500 had to compete against the newly allowed 4-stroke machines. | 2nd[2] |
Notes
- ↑ Adams, Dean. Antonio Cobas Dead at 52 Superbikeplanet.com 2004.
- ↑ All but 10 points that counted towards the Constructor's championship were scored by Yamaha's YZR-M1 4-stroke machine
External links
- Official Yamaha page for the history of the YZR500 (in Japanese)
Grand Prix Motorcycles, 2000–2009 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Series | Manufacturer | 2000s | |||||||||
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ||
MotoGP 500 cc 990 cc 800 cc |
Aprilia | RSW 500 | RS Cube | ||||||||
Ducati | Desmosedici GP3/GP4/GP5/GP6 | GP7/GP8/GP9 | |||||||||
Honda | NSR500 | RC211V | RC212V | ||||||||
Ilmor | X3 | ||||||||||
Kawasaki | ZX-RR | ZX-RR | |||||||||
Suzuki | RGV500 | GSV-R | GSV-R | ||||||||
Team Roberts | Proton KR3 | Proton V5 | KR211V | KR212V | |||||||
Yamaha | YZR500 | YZR-M1 | YZR-M1 | ||||||||
250 cc | Aprilia | RSW 250 | RSA 250 | ||||||||
Gilera | RSW 250 | RSA 250 | |||||||||
Honda | NSR250 | RS250RW | |||||||||
RS250R | |||||||||||
KTM | 250 FRR | ||||||||||
Yamaha | YZR250 | ||||||||||
TZ250 | |||||||||||
125 cc | Aprilia | RSW 125 | RSA 125 | ||||||||
Derbi | 125 GP | RSW 125 | RSA 125 | ||||||||
Gilera | 125 GP | RSW 125 | |||||||||
Honda | RS125R | ||||||||||
Italjet | F125 | ||||||||||
KTM | 125 FRR | ||||||||||
Loncin | 125 | ||||||||||
Malaguti | 125 | ||||||||||
TSR-Honda | AC11M/AC12M |
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