Por si te aclara algo :
"Seat Options
One Alternative is the the LOWER GS Dualseat which is 40mm lower than the stock GS Seat.
BMW Parts Numbers for GS/Dakar Dual-Seat
(F650GS & Dakar) 52 53 2 345 735 Dual-seat, high, black
(F650GS & Dakar) 52 53 2 345 736 Dual-seat, low, black
The Dakar standard seat is 780mm (30.7"
The Dakar short Seat (GS Stock Seat) is 750mm (29.5"

(Difference of 1.2"
Apparently BMW also now offer an extra low seat for the Dakar, but many believe it is actually a Wunderlich seat anyway. Ref: New info on lower seat:
I just wanted to pass this info along since there has been much confusion around this subject.
There are three seat options for the GS:
1. High Dakar Seat
2. Standard seat (comes with the bike)
3. Low seat (little over 1" lower)
First of all, my dealer insisted that there was a lower seat option for the GS even after I told him that all my research from this board and from BMW site said otherwise. He was even going to order one for me. I passed on it and instead bought a used one from our classified section. This was new in the box. There were no signs of modification. I just put it on the bike and it is considerably lower than the standard seat. I'm just guessing but I assume it's similar to Wunderlich lower seat in height but much cheaper in price. The person I bought it from paid $165 new from the dealer. Ed Northern VA.
There is also a single seat as an option and that its height is said to be somewhere in between the others. Refer : DHP Solo Seat and DHP Solo Seat 2..
Another alternative for the Dakar is that you can buy a lower seat from Wunderlich,
www.wunderlich.de, called the Ergo Series. Here is a direct link, and shows Photos of both high, middle and lower seats. Sitzbankserie Ergo.
Here are the three Seats, high, middle, low, from Wunderlich:
For Opinions on Stock/Aftermarket Seats and the BMW Single Seat, refer the Aftermarket Seats FAQ (Both Bikes).
Here is a Picture of BOTH Seats, Side by Side. Thanks to Haakon & Fernando.
So what are the differences between the Stock Seats?
Dakar and GS seats are interchangeable. Dakar is 1" higher. Many in your position have received a trade by the dealer upon purchase. Last year Wunderlich came out with a seat that is 1.25" lower than the GS. Looked like OEM to me and I wondered if Wunderlich makes the OEM seats for BMW. Then this year BMW came out with their own extra low seat that can be purchased. Does not come standard on any bike. Also 1.25" lower than the GS. Much cheaper than the Wunderlich....same price as the other two seats....about $160.....if memory serves. That said...I'm <5'5" with a 29" inseam. Ride the GS with the standard seat. Weight allows me to set the suspension somewhat soft. That coupled with some thick-soled boots works just fine. Shelley798
If you check the Wunderlich site (
www.wunderlich.de) - you can see that they make 3 seats. They all cost the same which is €400 or €200 if you trade your old seat. € and $ is about the same. Use the babelfish translator for more info (unless you speak German) -
EXTRA LOW - 70cm Lower than standard Dakar
LOW - 40cm Lower than standard Dakar
HIGH - 30cm Higher than Dakar."
Salu2