Moto-Sport Panniers makes 'Yukon II' hard mounted soft panniers as well as traditional hard panniers.
Dirt Bagz are an inexpensive soft pannier and bracket system by the Moto-Sport Panniers people that many riders swear by.
Turbo City has several variations of top racks and pannier racks designed for Cortech soft luggage.
Twisted Throttle carries a sophisticated SW-Motech aluminum top rack which can be adapted to many kinds of hard and soft carriers.
This eBay seller used to make the well-known "BBQ" rack for the DR and the KLR650.
Cycleracks.com builds a large, well-made, nice looking rack.
Giant Loop Moto These guys make a system of saddle bag that does not require panniers racks and work great offroad. The Fandango tank bag and Great Basin saddle bag work great on a DR with the IMS tank. The Fandango can just unzip to allow fueling up. The great thing is once you are at destination, remove luggage and no cumbersome panier racks!
SW-MOTECH Quick-Lock Sidecarrier (Suzuki DR650SE, '96-) Original Style for Givi, Micatech, TraX, Krauser, & Hepco sidecasesHigh-quality, German-made Quick-Lock luggage sideracks by SW-MOTECH. This unique design allows the racks to be removed from the bike in less than 30 seconds without special tools by opening 3 quick-release fasteners on each side. These narrow profile, black powder-coated steel racks are compatible with luggage cases from GIVI (Monokey system), TraX ALU-BOX, Pelican, Kappa, Shad, Hepco-Becker, Krauser, and more. Luggage-specific adapter kits are sold separately. Strong enough to withstand adventure-touring off-road abuse, yet completely removable for local cruising or track days.
Moto-Racks.com - Dual Sport Motorcycle Luggage Racks for Suzuki DRZ 400S, Suzuki DRZ 400E, Kawasaki KLR650, and currently designing an Adventure Rack System for the Suzuki DR650!