01 Wr426... What to do next?


7 replies to this topic
  • turbogtimk4

Posted August 17, 2007 - 02:55 PM

#1

I have an 01 wr426. Mods consist of: throttle stop removed; grey wire mod; k&n air filter with air box lid removed; quick shot; power now valve; full big gun exhaust. Like the rest of us, im always looking for more. I am going to rebuild the top end with a weisco piston this winter and port it. what else is there to do? Ive heard of people putting yz cams in, but i like the way the power band is now. Do the yz cams differ from hot cams? What would you guys recomend? Thanks guys!

  • byggd

Posted August 18, 2007 - 06:06 AM

#2

Sounds like you have done your research. :thumbsup: Keep an eye on the K&N air filter. Many in here have seen dust and sand getting past the K&N. :thumbsdn: I prefer twin air and moose racing makes a quality filter.
I put a YZ ex cam in my 02 and I like the way it smoothed out the power band. Here is a chart showing the difference and the instructions in case you decide to do the install.
http://s18.photobuck...0cam_Page_2.jpg
http://s18.photobuck...0cam_Page_1.jpg

Another cheap but effective mod is the BK mod. Click on this link, tech articles, BK mod. It allows you to shorten/adjust the spray time of the accelerator pump. A lot of other great advice on the site too.
http://motoman393.thumpertalk.com/

  • Birdy426

Posted August 18, 2007 - 03:44 PM

#3

If you're doing the piston anyway, GO BIG. A 444 kit from Lukes Racing and a set of Hot Cams will really wake that bad boy up!

  • Pooley

Posted August 19, 2007 - 07:19 AM

#4

If you have off idle problems, specifically a bog when cracking the throttle. I would suggest researching the O-ring mod rather than the BK mod. I too have an 01 WR 426, and I have recently removed the BK mod in favor of the O-ring.

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  • turbogtimk4

Posted August 19, 2007 - 11:53 AM

#5

it does have an off idle bog, but everybodys ideas will more than likely be tried ;) thanks guys!

  • sheesfast

Posted August 19, 2007 - 03:43 PM

#6

If you have off idle problems, specifically a bog when cracking the throttle. I would suggest researching the O-ring mod rather than the BK mod. I too have an 01 WR 426, and I have recently removed the BK mod in favor of the O-ring.


Hmm, what is this O-ring mod you speak of?
:)

  • Pooley

Posted August 19, 2007 - 08:28 PM

#7

Hmm, what is this O-ring mod you speak of?
:)


Its all here:

http://www.thumperta...ad.php?t=521725

  • sheesfast

Posted August 19, 2007 - 09:13 PM

#8

Its all here:

http://www.thumperta...ad.php?t=521725


Thanks man!
I'll try that out tomorrow.




 
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