2004 yz450f carburetor How do you remove needle valve seat


5 replies to this topic
  • DavidAchziger

Posted November 30, 2008 - 09:17 PM

#1

I am wondering how to remove the needle valve and needle valve seat of carburetor I am trying to remove the needle valve seat it has grooves in it this is the little brass oval that the float needle valve sits in. I do not know how to remove The seat I dont want to force it out so if any one knows how to do this please let me know. thank you

  • grayracer513

Posted November 30, 2008 - 09:53 PM

#2

There is a small Phillips screw next to the seat that hols ti down by clamping the edge to the carb body. It will be tight so use a screwdriver in good condition that fits properly.

Download a manual:

http://www.yamaha-mo...ice/manuals.jsp

  • SXP

Posted December 01, 2008 - 06:40 AM

#3

There is a small Phillips screw next to the seat that hols ti down by clamping the edge to the carb body. It will be tight so use a screwdriver in good condition that fits properly.

Download a manual:

http://www.yamaha-mo...ice/manuals.jsp


Gray - That changed with the 03 and up carb. The seat is now (permanently ?) pressed into the carb body, and for the life of me I could not figure out a way to get it out. A piss-poor design in my opinion:bonk:

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  • grayracer513

Posted December 01, 2008 - 07:25 AM

#4

Gray - That changed with the 03 and up carb. The seat is now (permanently ?) pressed into the carb body, and for the life of me I could not figure out a way to get it out. A piss-poor design in my opinion:bonk:

Isn't that intriguing? I just looked at the parts book, and it no longer lists the seat as a serviced part. I guess they don't go bad anymore. The needle is till listed, but by itself.

  • DavidAchziger

Posted December 01, 2008 - 08:11 AM

#5

it says in the book if needle valve seat is worn replace it do you have to buy new carb or have it pressed out

  • grayracer513

Posted December 01, 2008 - 08:51 AM

#6

Text like that is quite often carried over from earlier manuals. It would seem that Keihin no longer sees the need to replace the seat.





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