Trouble With 2000 yz426f!

6 replies to this topic
  • yamaha426riderr

Posted August 10, 2011 - 11:29 PM


I was out riding my bike recently when I was in 4th gear about mid throttle and it killed on me.I started it again an got back down on it an it did the same thing.Afterwards,the bike didn't want to start at all an it felt as if it had lost spark plug still won't start..could this be the valves.??I hope this is an easy fix..

  • Stinger1133

Posted August 11, 2011 - 06:35 AM


Is there still a good amount of resistance when you try to start it ?

  • yamaha426riderr

Posted August 12, 2011 - 05:02 AM


Some resistance,but not like it should

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  • Stinger1133

Posted August 12, 2011 - 05:29 AM


i would do a compression check.

  • yamaha426riderr

Posted August 13, 2011 - 07:52 AM


I'm getting it checked out today..I hope its not anything major..

  • TD-3

Posted August 13, 2011 - 04:52 PM


Did you make sure the valve shims where seated well? I once had a couple of them not seat all the way, which then held the valve slightly open and it woundn't start.

  • grayracer513

Posted August 13, 2011 - 05:01 PM


That was after you worked on it. It won't happen while it's running.

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