Or the alternative of using the OEM rack and placing most of your weight on sidebags supported by the main frame/rear seat area. I use a simple rack to hold bags away from bike, but they don't support the weight - the bike frame does.
Hey Peruano, what kind of saddlebags do you have and how did you install them? I have a set of "Built" from Cyclegear but really can't figure out how to mount them. Any advise? BTW, I have the Yamaha rack on my TW.
Peter, I have TourMaster Nylon II slant bags. I believe they are the same ones that MrGizmow uses. I've probably had more than 40 or so pounds of rocks in them at times without problems. They are connected by an adjustable yolk that spans the rear part of the seat and that holds the majority of the weight. I have a simple homemade rack that holds the bag away from muffler, wheel, chain line etc.
Note that I used the Passenger foot peg slot for the bottom attachment and the furthest main frame attachment point for the attachment at the top (maximal strength and not involving the limited strength frame extension and tail light attachment point) that the oem rack depends. BTW the PAX pegs are not symetrical so the frame I made is not identical from side to side either. But basically these racks just hold my bags out from the bike and prevent them from moving forward or back. Utilitarian not beautiful.
Here are a couple of links related to bag options.