300xcw 2011 red spring

Hi all, i have a 300xcw 2011 and i wanna know if im putting the red spring for the power valve if its gonna change my jetting or not. Thanks



one can argue that having the PV open sooner/later/faster/slower can have an effect on jetting because you change where the engine experiences more/ess load for each throttle position and may need more/less fuel, but i have not experienced that.


dont be afraid of jetting, certainly dont let jetting hold you back from trying to improve/tune your bike to your liking...

No..  Your jetting will not be affected. 

Ok thanks for the quick respond boys...

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