1998 or 1999 YZ400 owners ???

3 replies to this topic
  • StreetbikePimp

Posted July 27, 2005 - 08:04 AM


I have a question about your carburetors.

Is there a throttle return spring located behind the small wheel that you hook up the throttle cables to?

I bought a used FCR39 carburetor off of the internet and my slide doesn't snap back when you let go of the throttle. I'm thinking that there is a spring missing.

Any help would be appreciated.

  • markit

Posted July 27, 2005 - 01:56 PM


Yes the return spring should be under there.

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  • StreetbikePimp

Posted July 28, 2005 - 05:36 AM



Next question. Does anybody have any idea where I could order that part from? Yamaha is no help. Since that part is not set-up as a replaceable part, all they can do is sell me the whole carberator.

I have put a couple of emails out to Keihin, but haven't got any response back.

  • sully16

Posted July 28, 2005 - 09:10 AM


Go to bikebandit.com input your bike's year and model and look in the oem section and you will see the exploded view of the carb with all the separate parts. I have ordered from them 3 times in the last 3 months and have received great service and their prices are pretty good. :applause:

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