Another jetting question on my 06.

4 replies to this topic
  • sjwr450

Posted December 29, 2005 - 06:37 PM


I put in the 48 pilot and a Zip ty screw. All else is stock on the settings.

I still get some popping on decel, not backfiring. It is just not as smooth as my 05. I have tried the screw frokm between 1 to 2.5 with no apparent change.

I was thinking of checking:
Float level
Air leak
Possibly the adjustable screw lost the oring?

Thoughts? Has anyone been able to remove the popping completely?

  • Eddie Sisneros

Posted December 29, 2005 - 06:48 PM


a slight pop on decel is perfectly normal.trying to eliminate it completely will result in to rich of pilot circuit in most cases.

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  • Matt96xr6

Posted December 29, 2005 - 07:07 PM


Check the exhaust flange at the head and the seal where it meets the midpipe section. An exhaust leak will cause the poping.

  • WR450F_RDR

Posted December 29, 2005 - 07:33 PM


As noted in another post I tried the 170 main and 48 pilot. I found the setup too rich for my elevation, ended up going 45 pilot and 168 main and about 2 on the fuel screw, It works pretty well for me. I think I will wait until I put after market exhaust on it in order to go to the 170/48 route. Maybe it will help you.
A question I have, is some popping on decel normal for the YZ? On my WR I dont have this popping at all and the bike runs great. I thought it may have something to do with the YZ timing??

  • sjwr450

Posted December 29, 2005 - 08:20 PM


I can say it runs awesome otherwise. No problems.

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