Thats good advice Backwoods, I'd go with it. Get all of the parts gathered first, then do the jetting, air box snorkle, de-smog and exhaust all at the same time. FWIW, I had an extra long 1/2" x 12" drill bit and drilled about 8" into the stock silencer while we were waiting for the Muzzy to arrive. It made very very little difference in sound or performance IMO. That stock silencer really needs to go as soon as you can afford it, Then all of your other mods will be used to thier full potential when the motor can get rid of all the exhaust gases it makes without straining at the very restrictive silencer. Until then, have a blast on your new bike dude! Randy.