98' WR400...BROKEN VALVE NEEDLE.......HELP !!!!!!

3 replies to this topic
  • xr600r

Posted April 11, 2003 - 10:18 AM


My buddies 98' wr400 has cracked and broken 2 valve needles, (the flat metal piece that sits in front of the slide in the carb.) since he's owned it. any ideas on what would cause this ? at about $100 apiece, and the chances of metal going thru the motor.. he needs to find an answer to this problem. thanx. :)

  • BrandonW

Posted April 11, 2003 - 10:21 AM


Does he have a functioning throttle stop?

I do not, and I also have cracked two of those things. I keep putting off replacing mine, and cutting it to the proper length.

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  • xr600r

Posted April 11, 2003 - 11:16 AM


i'm pretty sure his throttle stop is there, and cut.

  • Hick

Posted April 11, 2003 - 12:31 PM


any ideas on what would cause this?

Have the slide rollers worn a groove inside the carb body?


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