All the seats below are interchangeable between the R, the S and the Rally. The R seat and the S seat in high position are exactly the same height if installed on the same bike. In lower position the S seat height drops by 20mm.
Note that the seat height is not everything. The S seat is wider than the R seat, making it harder to slide and reach the floor, so on the same bike the S seat will seems higher. Same thing about the low seat, it is only 5mm lower than the S seat in low position, but it is narrower, making it easier to flat foot. And the same for the tall rally seat, standard on the Rally, it is tapered at the top, making it easy to slide sideways to put a feet on the ground, despite sitting higher than all the other seats.
Also, contrary to some other models, and like the heated grips, the heated seats are not controlled in the bike’s menu, but simply by push buttons. The driver’s one is supposed to be installed on the removable tab on the right side of the dashboard. See the manual.
Here are the KTM seats available on powerparts:
|Seat||Part number||Seat height S||Seat height R||Seat height Rally*||Price (estimate)|
|Tall Rally seat, black||63507941000||870mm||900mm||910mm||£180|
|Tall Rally seat, orange||63507941000EB||870mm||900mm||910mm||£180|
|Single piece R seat||63507140000||850mm||880mm||890mm||£116|
|Two part S seat||63507040000 (front)|
|870mm (low) 890mm (high)||£116 each|
|Two part Ergo heated seat||63507940000 (front)|
|870mm (low) 890mm (high)||£270 (front)|
The numbers in this table have been recalculated assuming that the seat height of 910 is correct, and the ground clearance in the model table is derived from this as well. The values in the manual don’t correspond to anything that makes sense once compared with the peg/seat distance on the other models which should be identical.
This is not helped by KTM giving the seat height for optional seats in differential values, which are probably rounded, or presenting marketing material with numbers rounded the other way, making it it close to impossible to get the right value in this table.
Third party offers
Rebel X Sport propose a rally seat cover with logos on all sides to put on the R seat. This is a permanent transformation, the original cover is completely removed.
Seat concepts offers a bunch of one piece seats, with different heights, for $300 to $320 each. Warning, the low version has been described as “might as well be sitting on a piece of wood” by an owner who got rid of it.
Corbin also makes a seat for the 790, with optional heating, and a lot of option in their seat configurator (from $540 depending on options)
Sargent Seat offers an upgrade for the OEM Two part S seat for prices starting at $350 for the driver, $380 for driver and passenger.