Difference between revisions of "Yamaha YZ490"
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|predecessor = [[Yamaha YZ465]] | |predecessor = [[Yamaha YZ465]] | ||
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|engine = 490 | |engine = 490 | ||
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Revision as of 19:31, 30 July 2019
Yamaha YZ490 | |
Manufacturer | [[Yamaha]] |
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Production | 82-90 |
Class | [[:Category:Motorcross motorcycles|Motorcross]] [[Category:Motorcross motorcycles]] |
Predecessor | Yamaha YZ465 |
Engine | 490 |
Spark Plug | NGK B9EG '82 , '83-85 , '86-87 NGK B8EG '88-90 |
Front Tire | 3.00-21 '82 80/100-21 '86-87 , '88-90 100/90-21 '83-85 |
Rear Tire | 140/80-18 '83-85 110/100-18 '88-90 140/90-18 '82 80/100-18 '86-87 |
Weight | |
Related | Yamaha 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
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
1983
1984
1985
See Also
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'Yamaha YZ490' | |
Manufacturer | [[Yamaha]] |
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Also called | YZ 490 |
Production | 1987 |
Class | [[:Category:All motorcycles|All]] [[Category:All motorcycles]] |
Engine | single cylinder, two-stroke |
Horsepower | 53.77 HP (40.1 KW) @ 7000RPM |
Fuel System | carburetor |
Transmission | Gear box: 5-speed Final Drive: chain |
Brakes | Front: single disc Rear: expanding brake (drum brake) |
Weight | 235.89 pounds (107.0 Kg) (dry), |
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
The engine was a air cooled single cylinder, two-stroke.
Drive
The bike has a 5-speed transmission. Power was moderated via the wet plate.
Chassis
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).