 Cosmetically, the T509 and the 1999 Speed Triples were nearly identical, and they shared many of the same components including the dual headlamps and single sided swing arm.Minor differences include the removal of the "T509" decal on the rear quarter panel and the addition of a header cross-over pipe.Small fairings referred to as "Bikini Fairings" were popular on these bikes, as well as other aftermarket accessories that wouldn't normally be of use to a fully faired sport bike.