There are so many really awful products on the market for both cruisers and sportbikes. Most of the cruiser stuff is understood to be pure junk and designed to look good and nothing else. The list of rubbish for your sportbike is also a long one and much of it has the promise of increasing power or at least looking like performance stuff. Things like aluminum sprockets, chrome wheels, fancy aluminum handlebar weights, swingarm extensions, rear turn signal integrators, most frame sliders, and a truck load more. We have to become more observerant and discretionary before shelling out our hard earned cash. The lousy product were discussing here is the infamous swingarm extensions. This is probably the king of bad ideas and clearly not designed by an engineer. I have seen these monsters destroy the rear end of many a sportbike. They simply don't fit very well, especially if we compound the problems by chrome plating issues of the extensions and the swingarm. I sell welded up swingarms from 2" to 12" for $299, so I really can't see any reason to install these little time bombs anyway. They're probably all right on a little 400 cc bike, but then what's the point?