I've got a set of Bub Dresser dogs on my Speedmaster. Made a big difference in power, didn't have to jet any different. Plug color is good and no flat spots(the one at about half throttle it used to have) or blubbers. The bike pretty much just goes now. Wish they were longer for apperance and to get the noise a bit farther back. A nice rumble when at idle, almost cop bait at a slow cruise and awfull darn loud when wacked wide open. The wife likes them so they'll stay on.
Chuck
