Just uncrated my new 2005 xr650r and the brp barely runs. Is it worth buying the power up kit or can I open up the airbox myself, rejet and slap on a yosh pipe to solve the problem. Right now the thing makes little power over about 3000 rpm from 3 to 6 thousand rpm then sputters and dies. Very disappointing results for me considering that they ride these things in baja at 100 mph i'd be lucky to get her up to 50 mph as is.Also is it worth the money for the edelbrock pumper carb. Im an expert racer who wants max performance without any internal reworks.Help.