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Old 12-20-2013, 05:53 PM   #1
paulie12's Avatar
Join Date: Jan 2013
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2003 SV650S
2006 CRF 100

CRF100 jetting?


Those who are familiar with the CRF100, what main jet size do you guys use? I have a stock pilot jet and I currently have a 112.5 in the main. Is this too rich for the winter? The airbox is de-snorkeled and I have an aftermarket exhaust and UNI filter.

Any input would be great. Thanks!
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Old 12-20-2013, 06:16 PM   #2
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1981 XR80

Stock Main Jet is 98, Stock Pilot is 35. The pilot jet only controls the idle, so this may be why it doesnt idle. 112.5 may be a little big as I have seen a 102 recommendation for pipe and filter. You can play with the clip and air screw, but for real tuning through the rpm range you have to have the jets right. Google it, there is a ton of stuff on and
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Old 12-20-2013, 07:31 PM   #3
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15 KTM RC390
07 DRZ400SM
05 Crf115

Here's a couple pages I have bookmarked, hope this helps..
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