It is pretty simple to do. Remove the top of the carburetor (4 Screws) remove the vacuum diaphram, spring and slide with needle. You drill the existing hole to 7/64 or something like that. check the size before drilling I guess the newer bikes already have the slides drilled to the larger size. Now you just reassemble in reverse. The toughest part is getting the diaphram to sit back in the groove that it came out of, it can be a real pain in the A$$.
