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crf 450 white bros race pipe jetting??

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Posted by: race-shop joe---------------------

just installed a white bros race pipe and twin air filter without the screen. i was wondering what kind of jetting i should be doing.bike is an 03 with the stock main being a 170. should i go to a 172 or 175 or leave it alone? im in south jersey right at sea level and average temps around 40 deg right now.



Posted by: Studboy---------------------

How does the bike run?



Posted by: race-shop joe---------------------

well i got to finally ride it today. bikes runs unbelievable. i have never had a pipe make that much difference before on any of my bikes.i think it might be a tad rich but itll be ok in this 30 deg wheather. ill put the 172 later.bike just pulls everywhere now.




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