1995 cr250 r

Cr250Jim

Member
Aug 2, 2009
3
0
Hey all, I have a question about jetting. I have a pro circuit works pipe and 304 factory sound silencer on my bike now. If i wanted to switch to a shorty silencer with the same pipe would I have to rejet?
 

whenfoxforks-ruled

Old MX Racer
~SPONSOR~
Oct 19, 2006
8,129
2
Merrillville,Indiana
More than likely. 15 to 20 degree temperature swing, 1500 feet of elevation change, or changing the way your engine breathes.
 

Pete Payne

MX-Tech Suspension Agent
Nov 3, 2000
933
38
The shorty should make no drastic change in jetting .
I ran one of these for years , my jetting seemed to always fall into this category :
172 main jet , clip in the #2 position air screw adjusted dailey depending on air quality .
My local is sea level .
 

Cr250Jim

Member
Aug 2, 2009
3
0
my questions is the bike is already jetted for the pro circuit pipe and factory sound silencer. would it be ok to switch to a shorty silencer without rejetting? I am looking for some more low end power.
 
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