2008年11月12日 · The 490 SHOULD have and could HAVE been a relative to the yz 250, but many things went wrong. Also, showing up on a two stroke motorcycle forum and posting how …

2013年11月13日 · hi,i'm no yz490 expert but i do remember reading about them being hard to jet and the motor's suffered from pinging/detonation problem's.the good new's is that a simple …

2012年5月3日 · Hello, All, I'm looking for ways to get my 1983 Yz 490 to start easier. My main type of racing is dead-engine-start Hare Scrambles.

2010年7月30日 · ive got my eye on an 82 yz 490, im trying to sell my 79 yz 250 project to fund it. the bike seems in good shape, he says its mint, but i havent seen it yet. ive read some other …

2016年8月30日 · Hey everyone have the opportunity to buy a cheap 1984 yamaha YZ 490 and would love to build this in a new style frame for example newer yz450 or 250f or a newer 125 …

2006年12月23日 · Had a 75 MX 400, 76 YZ 400, 82 490, 87 490. I never checked compression once. After blowing the YZ and MX 400 up twice I went to a 32:1 and ran a bit rich. I would run …

2013年11月13日 · 1989 yz 490 --- best mods? By Mountainmanmyke, November 13, 2013 in Yamaha 2 Stroke. Share More sharing ...

2017年2月15日 · Any hints on how to get a 1987 yz 490 to start easier. Any hints or tips appreciated ... The 490 has worn ...

2012年3月10日 · yz 490 questions. By motomonster360, March 10, 2012 in Vintage Dirt Bikes. Share More sharing options...

2013年8月30日 · 004.JPG 008.JPGThe 490 is pretty strong it had its bad spots. But with a few simple mods it works really well. But with a few simple mods it works really well. And most of …