2008年11月12日 · My recently finished 82 YZ490 project. There are many who say the 82 YZ490 could not be made to run clean without pinging. With the proper head modification and jetting changes it runs clean,

History: The Yamaha YZ490 was introduced in 1982 (following in the footsteps of the YZ465). Sadly, the 490 was heavier than the 465, nowhere near as reliable, difficult to start, had grim...

2019年11月23日 · 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 | edit source ]

2014年9月5日 · Yamaha introduced the YZ 490 in 1982, after a solid run with the YZ465. 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 …

1982年5月1日 · Four Speeds and a Big Motor Aren't Quite Enough. The new rear suspension is much like the factory racers’ suspension used during the ’81 season. Where the old system relied on progressively wound...

2007年1月12日 · Owned a 92 WR500 for 3.5 years. Points right on: mucho vibration, head mod necessary, gobs of torque and top end. I actually modified mine extensively: increased bore from 490 to 515, 39.5mm Keihin carb, fmf pipe and had noleen do …

2012年6月14日 · In an effort to help fellow bikers properly ID their bike I have provided the following information on VIN ( Vehicle Identification Number ) , Engine ID and part identification. All the information provided is to the best of my knowledge correct. As we part more bikes out we will add more information to this chart.

The WR500 was introduced in 1991, billed as a 1992 model, and was produced until late 1993. It was an updated version of the aged, but venerable YZ490. The WR500 engine is the same mill that powered the YZ490, unchanged except for the ignition stator, 38mm round-slide Mikuni, new combustion chamber, pipe and silencer.

1984年7月1日 · The YZ490—and before that, the YZ465—might have been hurting in one area or another, but horsepower hasn’t been one of them. And the 1984 YZ490 is no exception; in fact, not only might it be...

Buy crankshafts for vintage motorcycles like this Yamaha YZ465 80 81 YZ490 82 90 WR500 92 93 Crankshaft, available only at Vintco.