1982 Yamaha Yz 100 Manual

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Yamaha YZ490
Manufacturer
Production 82-90
ClassMotorcross
PredecessorYamaha YZ465
Engine
490
Top Speed88 mph
Spark PlugNGK B9EG '82 , '83-85 , '86-87
NGK B8EG '88-90
Front Tire3.00-21 '82
80/100-21 '86-87 , '88-90
100/90-21 '83-85
Rear Tire140/80-18 '83-85
110/100-18 '88-90
140/90-18 '82
80/100-18 '86-87
Weight
Recommended OilYamalube 10w-40
RelatedYamaha IT490
Manuals Service Manual


The Yamaha YZ490 is a motorcycle produced by Yamaha from 1982 to 1990.

Yamaha introduced the YZ 490 in 1982, after a solid run with the YZ465.

Problems[edit]

Sadly, the 490 was heavier than the 465, nowhere near as reliable, horribly difficult to start (hot or cold), came with a grim suspension, vibrated enough to bring blisters to your hands and was impossible to jet.

If you jetted it rich enough to keep this dog from seizing, it would blubber, puke, foul plugs and produce no power. If you jetted it to run strong, it would invariably seize. It came with air leaks, a wandering ignition, gimpy motor mounts and the worst case of Yamahop at high speeds since the original DT-1. Yamaha issued a mountain of service bulletins to try to fix the problems. None of them worked.


1982[edit]

1976 Yamaha Yz 100


1983[edit]

1979 Yamaha Yz 125 Specs


1982 Yamaha Yz 100 Manual


1984[edit]

  • 1984 Yamaha YZ490 in Yellow

  • 1984 Yamaha YZ490 in Yellow

  • 1984 Yamaha YZ490 in Yellow


1985[edit]

1982 Yamaha Yz100

1982 yamaha yz 100 manual review


See Also[edit]

1982 Yamaha Yz 80

Yamaha YZ series
YZs:
YZ50 ·YZ80 ·YZ85 ·YZ100 · ·YZ125 ·YZ175 ·YZ250 ·YZ250F ·YZ360 ·YZ400 ·YZ400F ·YZ426F ·YZ450F ·YZ465
See Also:
Honda CR series ·Suzuki RM series ·Kawasaki KX series
1982


Yamaha
Motorcycles:
Yamaha XS series ·Yamaha IT series ·Yamaha MX series ·Yamaha YZ series ·Yamaha RD series ·Yamaha TZ series ·Yamaha FZR series ·Yamaha WR series ·Yamaha XT series ·Yamaha XV series ·
Misc:
Yamaha YZ490
Manufacturer
Also called YZ 490
Production 1987
ClassAll
Engine
Top Speed88 mph
Horsepower53.77 HP (40.1 KW) @ 7000RPM
Fuel Systemcarburetor
TransmissionGear box: 5-speed

Final Drive: chain

Clutch: wet plate
BrakesFront: single disc
Rear: expanding brake (drum brake)
Weight235.89 pounds (107.0 Kg) (dry),
Recommended OilYamalube 10w-40
Manuals Service Manual


The Yamaha YZ490 was a single cylinder, two-stroke All motorcycle produced by Yamaha in 1987. Claimed horsepower was 53.77 HP (40.1 KW) @ 7000 RPM.

Engine[edit]

The engine was a air cooled single cylinder, two-stroke.

Drive[edit]

The bike has a 5-speed transmission. Power was moderated via the wet plate.

Chassis[edit]

2001 Yamaha Yz 125 Specs

Stopping was achieved via single disc in the front and a expanding brake (drum brake) in the rear. The bike weighed just 235.89 pounds (107.0 Kg).

In Media[edit]

Yamaha

References[edit]

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