Auto Decompression exhaust cam???


15 replies to this topic
  • steve lemley

Posted January 20, 2006 - 07:35 AM

#1

I have heard rumors of this exhaust cam that auto decompresses during kick starting to allow you to start your bike like a 2 stroke. The problem is that I don't know the name of it so I can't search old forums. Could some just give me the name of it so I can search. Maybe a testomonial or two if someone is using it would be nive also. :thumbsup: :bonk: :thumbsup: :eek: Thanks again guys!!!

  • kbryant3399

Posted January 20, 2006 - 09:00 AM

#2

do a search on "Autodecompression cam", "hotcams" or YZ450 cam. Hotcams website sells them for any bike so search that site as well. www.hotcams.com

  • byggd

Posted January 20, 2006 - 02:16 PM

#3

What year bike do you have? If it's a 2000-2002 WR or YZ 400 or 426 you can use these instructions and it even gives you the Yamaha part number. I converted my 02 wr426 and it's the second best mod I have have done next to the Rekluse clutch :thumbsup:
http://photobucket.c...0cam_Page_1.jpg

  • 642MX

Posted January 20, 2006 - 09:00 PM

#4

The auto decompression cam is awesome. Its well worth doing, don't forget to order a decompression plug from the TT store.

  • bigdrtrdr

Posted January 20, 2006 - 09:49 PM

#5

I kept the manual decomp lever and junk, Sometimes ya gotta clean it out.

  • byggd

Posted January 21, 2006 - 05:47 AM

#6

I kept the manual decomp lever and junk, Sometimes ya gotta clean it out.

I took mine off. To clean it out all you do is pull the hot start, hold the throttle open and the kill button down and kick it over a few times :thumbsup:

  • bigdrtrdr

Posted January 21, 2006 - 08:19 AM

#7

Thanks, Bygdd I'll strip it off as soon as I get the plug kit.

  • CAVSCOUT96

Posted January 21, 2006 - 08:39 AM

#8

What year bike do you have? If it's a 2000-2002 WR or YZ 400 or 426 you can use these instructions and it even gives you the Yamaha part number. I converted my 02 wr426 and it's the second best mod I have have done next to the Rekluse clutch :thumbsup:
http://photobucket.c...0cam_Page_1.jpg



I have a '99 WR. Will it work on mine too?

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  • nimiz1

Posted January 21, 2006 - 09:20 AM

#9

can i replace only the exhaust cam to the yz-450 , do i need anything alse
i have a 1998 wr-400.

  • byggd

Posted January 21, 2006 - 09:31 AM

#10

I have a '99 WR. Will it work on mine too?



can i replace only the exhaust cam to the yz-450 , do i need anything alse



I don't know if the mod was ever tested on pre 2000 bikes :thumbsup: maybe someone else will know :bonk:

As far as anything else needed, all I need were some new shims.

  • 642MX

Posted January 21, 2006 - 01:10 PM

#11

I don't know if the mod was ever tested on pre 2000 bikes :thumbsup: maybe someone else will know :bonk:

As far as anything else needed, all I need were some new shims.




It will work on the 400's also.

  • CAVSCOUT96

Posted January 21, 2006 - 02:36 PM

#12

This is gonna be my next mod. It's bound to save me some energy when I crash during harescrambles!!

  • JMathis

Posted January 21, 2006 - 06:47 PM

#13

You will be amazed at how much time and energy it will save you durring an HS. I have not done the auto clutch yet so this was certainly the best mod that I have done. Plan on getting some larger shims.

  • CAVSCOUT96

Posted January 21, 2006 - 07:21 PM

#14

I think I'm gonna try to get the mechanics at my local shop to walk me through it. They're starting a new D10 HS series here in KY and I'm gonna try to get them to help me out on parts and teaching me some wrenching!

  • steve lemley

Posted January 24, 2006 - 09:06 AM

#15

Anyone got one of these auto decompreesion cams that will work for my 99 wr400 for sale??? If so email me with a price. Thanks stevelemley@sbcglobal.net

  • byggd

Posted January 24, 2006 - 12:11 PM

#16

I got mine from the TT store OE parts. It was less than $120 delivered and the dealer wanted almost $160 :thumbsup:




 
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