Dubach Pipe

5 replies to this topic
  • cashjarrmotox

Posted March 26, 2002 - 04:44 PM


I have a 2002 YZ426 with a Dubach pipe. Any body have any input as to jetting changes or if they are needed when using this pipe?

  • 426guy

Posted March 26, 2002 - 06:01 PM


no jetting changes needed..(due to the pipe)

  • 4-stroke_carabao

Posted March 26, 2002 - 06:15 PM


I also own a 2002 YZ426F with the Dr. D pipes. Dubach Racing Development indicated that no jetting changes were needed. However, you still need to make appropriate adjustments for your location (ie. temp.,humidity,altitude, etc.). I'm at sea-level with high temps.(80F - 85F) and high humidity, so my bike requires a leaner mixture. Are you experiencing any problems with the pipes installed?

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  • cashjarrmotox

Posted March 27, 2002 - 03:48 AM


I have been riding in 45 degree weather so that may be my problem. My bike has been running rough and seems to have lost some top end???

  • kfrosty

Posted March 27, 2002 - 04:49 AM


You will need to jet for elements. I just ordered a pipe from Gina yesterday. She informed me that some of their customers found they needed to go with a different needle jet with their pipes. Here's the info she sent me on it.

The jet part number is 5JG-14916-J1

Run it in the #4 position

If you have problems after that, email dubachracing@attbi.com They are extremely good about helping.

  • Ga426owner

Posted March 27, 2002 - 10:22 PM


Kfrosty, what does the new needle jet give you if you do not have to rejet? Better throttle response?

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