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whats the set for full fmf powerbomb exhaust jetting
  • jc5057
    Posts:9
    Joined:Thu Apr 24, 2008 2:48 pm
    whats the set for full fmf powerbomb exhaust jetting

    by jc5057 » Fri May 09, 2008 5:08 pm

    I have a 07 450x

    Ride at sea level to 3000 elavation

    Opened up air box already cut side vents and removed snorkel

    45 pilot
    165 main
    2 turns out on fuel srew

    3rd position on needle which is a r needle ncvs 16233-men-671

    I just added full FMF exhaust with power bomb header and fmf speed titanium muffler.

    Noticed it breathing a lot more and seems to need a bit more on rich side as there is a little popping but not much.

    Will dropping the clip one notch on the needle get her dialed in ? or turn the fuel screw outmore?

    Any advise or wisdom is greatly appriciated.
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    Skoot22
    Posts:2380
    Joined:Sun Sep 03, 2006 9:51 pm

    by Skoot22 » Fri May 09, 2008 5:30 pm

    I dont think you can rid 100% of the decel pop. I noticed on my last ride i have a little. You can open your fuel screw up a little more, dont go more than 2.5 turns. If so then you need to go to a 48 pilot. Which is a little rich IMO. AS runs a 48 and likes it. I run a 42 pilot, i may go back to the 45, but i like the responce of the 42 better..

    Is your smog pump removed or disabled?
    Scott
    05 CRF450X
    Bakersfield, Ca
    Image
  • jc5057
    Posts:9
    Joined:Thu Apr 24, 2008 2:48 pm

    smog pump

    by jc5057 » Fri May 09, 2008 6:18 pm

    smog pump is plugged up with jb
  • jc5057
    Posts:9
    Joined:Thu Apr 24, 2008 2:48 pm

    by jc5057 » Fri May 09, 2008 6:21 pm

    I have the fuel screw out at 2 1/2 turns now and it seems very good and crisp no popping or bogging.

    Is there a chance the fuel screw could fall out I dont like it backed out that much as I heard it could fall out
  • User avatar
    Skoot22
    Posts:2380
    Joined:Sun Sep 03, 2006 9:51 pm

    by Skoot22 » Fri May 09, 2008 6:25 pm

    jc5057 wrote:I have the fuel screw out at 2 1/2 turns now and it seems very good and crisp no popping or bogging.

    Is there a chance the fuel screw could fall out I dont like it backed out that much as I heard it could fall out
    Only if you go to like 3 turns or more. Probably even more than that. You are safe at 2.5 turns.
    Scott
    05 CRF450X
    Bakersfield, Ca
    Image
  • jc5057
    Posts:9
    Joined:Thu Apr 24, 2008 2:48 pm

    by jc5057 » Fri May 09, 2008 6:31 pm

    thank you for your knowledge as I was going to sell this x when I first got it but it is growing on me now the more I ride it. She sure is fast now.
  • User avatar
    Skoot22
    Posts:2380
    Joined:Sun Sep 03, 2006 9:51 pm

    by Skoot22 » Sat May 10, 2008 1:28 am

    Right on, glad i could help and everything is working. I felt the same way when i first got my X. Now i love it.
    Scott
    05 CRF450X
    Bakersfield, Ca
    Image
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    paul turner
    Posts:7578
    Joined:Thu Sep 22, 2005 9:03 pm

    by paul turner » Thu May 15, 2008 6:01 pm

    jc5057 wrote:thank you for your knowledge as I was going to sell this x when I first got it but it is growing on me now the more I ride it. She sure is fast now.


    Proof of the Pudding !! 8)


    Congrats ! :)
    If you ain't crashin', you ain't ridin' :-)
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