by Crf fan » Thu Aug 23, 2012 11:00 pm
Athough it may not be bad idea to set the valves anyway, no differernt valve setting is needed for the exhaust up grade.You may be thinking of the "carb jet change" that should be done,most pipe manufactures will have a recommended jet size with their product. with help from this forum you may want to tackle it yourself,(its not that bad) but your dealer or any reputable cycle shop should handle it.