Changing Jets

D

Drew 674

Member

Jul 25, 2002

152

0

• Jul 25, 2002

• #1

I am putting a new fmf pipe and siliencer on my (Stock) '00 cr250, never done it before, any suggestions (I Plan On Using FMF Suggestions)....she runs rich as it is, i'm running 32:1 per manual w/93 octane...will 110 help?

ok, i've read so many jetting articles i can't think now....
my bike is set up pilot 48, main 180, needle A715 3rd position
so is 45, 178 Leaner or Richer??

 

Last edited: Jul 25, 2002

S

Shift-MX

Member

Feb 10, 2002

136

1

• Jul 25, 2002

• #2

people can just tell you what kind of jets to use...its all about the bike. Changing the octane will change the way the bike runs...good maybe....bad maybe. If you change the octane youll have to change your jetting.

 

C

crkid

~SPONSOR~

Oct 14, 2001

665

0

• Jul 25, 2002

• #3

Changing the pipe and silencer didn't change my jetting hardly at all. It was running rich to begin with, but you'll need to do more to accomodate for race gas.

 

D

Drew 674

Member

Jul 25, 2002

152

0

• Jul 25, 2002

• Thread starter
• #4

crkid, did you leave your jetting stock after changing the pipe and silencer?

 

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crkid

~SPONSOR~

Oct 14, 2001

665

0

• Jul 25, 2002

• #5

I did, but would recommend not doing so. It was running wayy too rich and fouling plugs, but the pipe and silencer didn't make it better or worse. Since then I have rejetted. Change the jets while you are working on it.