Nothing.
18 motorcycles ago I vowed to never own a scooter.
I've always had a cruiser, sport-tour, tour or sport bike. This bike incorporates all of the above.
I own a Honda Reflex 250 also, so I have no problem explaining the virtues and making excuses to my friends for owning a scooter. But I can't view this bike as a scooter. It is way too motorcycle like from its handling to its acceleration. And the all day comfort is a big plus.
It was a long caffeine influenced winter in front of the computer that got me interested in a Maxi-scooter, and the Burgman in particular. After my purchase, I thought I might have made a mistake having never ridden one before. I can honestly say I have no reservations, now that I've lived with this two wheeled oddity for a while.
Total city comfort and relaxation, with the ability to rip it up in the twisties if desired, or embarrass a cruiser at a stop light.
Touring is not a problem either. Between the 55 liter under seat weatherproof storage, three glove boxes, and the 45 liter optional top box I installed, I have more stow room than any previous bikes owned.
Most people that have read about the bike want to know about the five speed manual/automatic plus overdrive = 6 speed transmission. New for 05. Although not as entertaining as when new, it operates flawlessly and the OD returns me as much as 60 mpg if ridden sanely, 45 mpg if not.
This scooter bike takes bumpy roads good. Great handling when you get used to it. Acceleration is more than adequate. Wind protection requires an after market windshield, then it's great. MPG is better than anything I've owned except the 250cc Reflex, which betters it by 10mpg.
I am 62 years old, overweight, and not too limber. I just completed a 450+ mile day on my Burgman, and I enjoyed every minute of the trip.
I have owned over 15 bikes over the years and I never thought I would "stoop" to owning a scooter. Glad I did.
I only have one problem with the Burgman. Being an "old" biker, I have a chip on my shoulder that forces me to take the Burgman and embarrass a biker every once in a while.
I am 68 years old, weigh 225, and have ridden and owned a variety of bikes, the last being the Goldwing.
However, I have enjoyed the 650 Burgman more than all the bikes I have owned. It is comfortable and a joy to ride.
I bought a GIVI windshield and it gives adequate protection. I put on a backrest, saddle bags and a trunk behind the riders seat as my wife does not ride, so I have more than enough storage.
I usually ride between 70 and 75 on the interstates, and get 55 miles per gal.
I really like the automatic and shift features. I thought I would need the shifting in the mountains, but there is enough power that I really do not need it unless I am just puttering along.
All in all, I love the bike, and it will most likely be my last if it holds out another 20 years.