- 2002
YZR-M1(0WM1)
Engine:Liquid-cooled 4-stroke, DOHC, in-line-4 The first YZR-M1 4-stroke racer - 2003
YZR-M1(0WN3)
Engine:Liquid-cooled 4-stroke, DOHC, in-line-4 Fuel injection system adopted - 2004
YZR-M1(0WP3)
Engine:Liquid-cooled 4-stroke, DOHC, in-line-4 Crossplane crankshaft, 4-valve format, 22-liter fuel tank (formerly 24-liter) - 2005
YZR-M1(0WP4)
Engine:Liquid-cooled 4-stroke, DOHC, in-line-4 New engine with center cam, air duct passage revised to improve cooling, cross member eliminated - 2006
YZR-M1(0WR3)
Engine:Liquid-cooled 4-stroke, DOHC, in-line-4 Electronic control of all four cylinders via throttle valve action (fly-by wire system) - 2007
YZR-M1(0WS4)
Engine:Liquid-cooled 4-stroke, DOHC, in-line-4 Newly designed compact engine, fuel tank capacity of 21 liters (formerly 22 liters) - 2008
YZR-M1(0WS5)
Engine:Liquid-cooled 4-stroke, DOHC, in-line-4 Pneumatic valve system - 2009
YZR-M1(0WS8)
Engine:Liquid-cooled 4-stroke, DOHC, in-line-4 New limits implemented on number of tires and engines used - 2010
YZR-M1(0WS9)
Engine:Liquid-cooled 4-stroke, DOHC, in-line-4
- 1973-74
YZR500(0W20)
Engine:2-stroke, in-line 4-cylinder Developed simultaneously with TZ750, Monocross suspension (1974), Bore: 54mm - 1974-75
YZR500(0W23)
Engine:2-stroke, in-line 4-cylinder GP500-specific design, cassette type transmission, cast wheels cast wheels (late specs) - 1977
YZR500(0W35)
Engine:2-stroke, in-line 4-cylinder Bore: 56mm, power-jet carburetor, slick tires front and rear - 1977-78
YZR500(0W35K)
Engine:2-stroke, in-line 4-cylinder YPVS - 1979
YZR500(0W45)
Engine:2-stroke, in-line 4-cylinder VM carburetor, base model for the production TZ500 - 1980
YZR500(0W48)
Engine:2-stroke, in-line 4-cylinder Aluminum square-section pipe frame - 1980
YZR500(0W48R)
Engine:2-stroke, in-line 4-cylinder Rear exhaust for the outer cylinders 1 and 4 only - 1981
YZR500(0W53)
Engine:2-stroke, in-line 4-cylinder Mounting the 0W48R engine on a 0W48-based frame - 1981
YZR500(0W54)
Engine:2-stroke square 4-cylinder All-new engine - 1982
YZR500(0W60)
Engine:2-stroke square 4-cylinder Bell crank type linked Monocross suspension - 1982
YZR500(0W61)
Engine:2-stroke V-4 Frame without the under-loop, lateral rear suspension - 1983
YZR500(0W70)
Engine:2-stroke V-4 Bottom linked Monocross suspension (from mid-season), 17-inch front wheel - 1984
YZR500(0W76)
Engine:2-stroke V-4 60-degree bank V engine - 1985-86
YZR500(0W81)
Engine:2-stroke V-4 Opposed-revolution twin-shaft crank - 1987
YZR500(0W86)
Engine:2-stroke V-4 New noise regulation compliance, radiator capacity, air duct size increased - 1988
YZR500(0W98)
Engine:2-stroke V-4 70-degree V bank, right-side twin mufflers, carbon disc brakes - 1989
YZR500(0WA8)
Engine:2-stroke V-4 Data memory system - 1990
YZR500(0WC1)
Engine:2-stroke V-4 Production engine to stimulate competition in GP500 - 1991
YZR500(0WD3)
Engine:2-stroke V-4 Electronic-control suspension - 1992
YZR500(0WE0)
Engine:2-stroke V-4 Phased simultaneous combustion engine (from mid-season) - 1993
YZR500(0WF2)
Engine:2-stroke V-4 Extruded aluminum frame - 1994-95
YZR500(0WF9)
Engine:2-stroke V-4 Forced-air type air box - 1996
YZR500(0WJ1)
Engine:2-stroke V-4 54mm bore, powder-metal piston, elimination of seat rail - 1997
YZR500(0WH0)
Engine:2-stroke V-4 75-degree V bank - 1998-99
YZR500(0WK1)
Engine:2-stroke V-4 Unleaded gasoline measures, 70-degree V bank - 2000
YZR500(0WK6)
Engine:2-stroke V-4 Component maturation, chassis dimension changes, new cowl design - 2001
YZR500(0WL6)
Engine:2-stroke V-4 Component maturation, new chassis dimensions, new-design rear arm - 2002
YZR500(0WL9)
Engine:2-stroke V-4 The last 2-stroke model
- 1957-58
YD racer
Engine:2-stroke, in-line 2-cylinder Yamaha's first factory racer. Two versions with different bore x stroke specs, full cowling - 1961
RD48
Engine:2-stroke, in-line 2-cylinder Yamaha's first GP250 machine, oil pump fitted forced lubrication, large cowling covering even the handlebars - 1962-66
RD56
Engine:2-stroke, in-line 2-cylinder Yamaha's first World GP championship-winning machine, final output of 55PS - 1967-68
RD05A
Engine:2-stroke V-4 Advanced version of the RD05, adjustable caster angle function, 73PS, aluminum and magnesium chassis parts - 1986
YZR250(0W82)
Engine:2-stroke V-2 Simultaneous detonation, twin crankshaft, 60-degree V format for reduced vibration, weakness in starting - 1990
YZR250(0WB9)
Engine:2-stroke V-2 Further development of the single crankshaft, 90-degree V-twin (0W90)
