What WR carbs DONT break slides?

6 replies to this topic
  • gearb0x

Posted October 14, 2007 - 01:50 AM



my bike (98 wr400 converted to 426 w/ hotcams) busted the slide not so long ago after around an estimated 3000k's.

After the new slide, i only got 1 ride out of it (500k's) so i think I'm going to change my carb.

What are the ones that don't have problems? i heard some of the 426's can run like ass.

also, jetting wise if i get a 2000 wr400 carb can i just swap the jets over or what? i dont know anything about jetting but im perfectly happy with my bike is jetted currently, asside from its diet of thin aluminium.


  • DanyR1

Posted October 14, 2007 - 06:12 AM


Men don't lose your time and money.....by an edelbrook carb, this is the best mod I do to my wr400 98. You will put money again and again in your old 1998 carb, paid the edelbrook $350.00 USD an never touch this carb for the last year...and no jetting needed....look at e bay...........good luck.

  • gearb0x

Posted October 15, 2007 - 03:53 AM


yeah im not really interested in buying an elderbrock carb, im happy with the way my bike runs asside from the self destruction of the slides :crazy:

Does any one know where i can get a CNC slide ready made or does anyone have any spare?

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  • bg10459

Posted October 15, 2007 - 05:56 AM


I searched the WR forum for "carb slide" and found this thread - http://www.thumperta...ight=carb slide
There are other threads, but in this one, one poster mentioned having custom slides made, while another used a WR450 carb. These may be your only options.

  • dkwok

Posted October 15, 2007 - 01:54 PM


maybe u gotta change to a post 2000 wr carb,
it may last longer, much longer,
but wear&tear parts need changing after awhile,
yam wr4 is a damn good bike,

  • ncampion

Posted October 15, 2007 - 05:42 PM


Get the Edlebrock. You will keep replacing slides until one time a big enough piece of slide with cause piston or valve damage, then you'll really be Pi--ed. You need an 00 or later carb to be away from the slide problem and they are not easy to come by used, then you still have a used carb, with possible other problems.

  • DanyR1

Posted October 15, 2007 - 06:06 PM


I can tell you, when a piece will pass into motor you will cry... I tell you again....EDELBROOK. How much you put on it in money from the begening ????? When my probleme start I have put a lot of money befor understand, the stock carb for 1998 is a piece of crap better for you to by right now an edelbrook carb befor to put too much money and dont have choice to buy an other carb anyway !!!!! :crazy: :D :applause: :bonk:


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