I recently moved from Buffalo, NY to Salt Lake City, Utah. I purchased my dr650 about a year ago. The guy I bought it from had it jetted and I think he had it jetted a little too rich even for buffalo. Now that Im in Utah and much higher in altitude the bike is running terrible. I've searched the forums and picked up a lot of helpful info but not sure on two things. A. I wanted to try to adjust the pilot screw...Im aware I have to drill through a brass fitting, but how? There is no space so do i have to remove the carb to drill out of cap? B. To adjust the jet, if it is already 'jetted' is there clips I should see?