Sighhhhhhhhh. I'm beginning to get the idea.
The not so good: These guys are interested in selling things - not necessarily in protecting your bike. I talked to a 'geek' from Revzilla. Nice guy, but, when I posed the question, "If the bike is dropped in a tip over - that is, in a parking lot, and not moving forward, will the bars you sell protect the bike from damage?" Of course he did not know. Guy at T-Rex racing was the same - nice, and he tried to help but in the end he did not know. These websites make you really pull teeth to get all the specs - only a few give you all the info w/o a phone call.
The better: A 1" material for the guard will allow the fastening of standard clamps for foot pegs or aux lights or even a camera. Givi are heaviest wall. At first I was skeptical of only two mounting points but most of them have this - probably because Suzi does not provide any other suitable locations. However, some use two bolts per location and others only one.
The confusing. One post here offered that the most protection would be afforded by Touratech > Givi >SwMotech (in decreasing order). AltRider look the best and with SS will not rust, but their price, with no guarantee other than gut instinct that they afford better protection than the others makes them a dubious choice. If they were smart, they would have tested them and bragged how good they are at protecting your bike. This alone kicks them out of the running for me. T-Rex's usage of smaller than 1" is a disadvantage because I hope to attach aux lights, and perhaps foot pegs. Their diameter 20 mm, is significantly smaller and I suppose weaker than 25mm (1") and they do nothing to allay that assumption by specifying high strength steel. Puig looks less protective than the others, but this is subjective.
I'm leaning toward the Touratech or Givi, with a nod towards the latter because of price.
Givi: (revzilla) $180; 1" tubing .095" thick Looks like two attachment points with crossbar connecting both sides.
Puig: (revzilla) $179; .083" thick Seems to have two mounting points (3 bolts per side) w, a cross bar in front. Looks lower than other brands
T-Rex Racing: $170; 20 mm tubing; Powder coated; Has two mounting points per side one of which is a thru bolt and an additional steel bar down low connecting both sides. The guard also bends around under the steering head and joins both sides together here. Excellent video of installation of these bars on their website. This video also showed the bike on its left side and how the hdpe puck holds the bike off the ground (and how their center stand helps protect the bike). They neglected to show the right side - probably because it would suffer more damage?
Altrider (revzilla) $400; Stainless steel 1" tubing; powder coated. Revzilla guy said these are the most robust - but could not say they offered any better protection than the Givi in a drop or crash. He THOUGHT they were the best..... They look great and are braced well and look fabulous, but with only two attachment points and one side to side connecting bar up front are they any better than any other at less than half the price? They also look like they do not protrude out very far from the tank nor do they extend up very high - more reason for questioning their value exp considering their high price.
Touratech - not available at this time for a '13 650.
SwMotech (revzilla) $265; 1.06" mild steel tubing (must be metric - 27mm); powder coated. out of stock. Uses two attachment points - two bolts at each plus crossbar.
And I still have to go thru this for skid plates.....