Compression Change CRF250R

If i change from 12.5:1 ratio to a higher ratio will i have to adjust anything else on the bike? I ride a 2005 Crf250r. Any and all help would be much appreciated. 

A better question is why are you interested in boosting the CR?


However, usually a slight change in CR only requires a slightly higher octane fuel.


Typically, the boost in performance is insignifivcant yet the additional expense of the CR change along with the pricey fuel makes it a bad idea.

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