A single miscue on Aprilia's part in specifying a shock and the Falco is hobbled for those of us with a penchant for barbecue sandwiches and the need for size-46 suits. Not for long, though, thanks to Traxxion Dynamics. Previously known more to racers than the rank-and-file street guys, Traxxion is trying to bust into the upgrade market with something called a Sport Shock. Take your basic Penske 8900-series shock--a fine, incredibly well-built hunk of suspension lust--remove the external reservoir (and compression-damping adjuster) and revalve. Now knock a bunch off the price and you've got a $575 shock (including shipping) that's custom-tuned for your bike and weight by Traxxion. In fact, you can't get this particular Penske anywhere else.