The choices are:

• Go with saddlebags with no hard support. Cheaper than the other solutions, but these will scratch the side plastics, and volume will be limited. Probably a good idea to remove the side plastics for those for a narrower bike. Depending on size those may require additional protection for the exhaust (Enduristan Inferno or similar)
• Installing a scaffolding to get side racks in place. On the racks one can attach aluminium boxes or soft bags. This also has the side effect of protecting the back of the bike and most notably the exhaust in case of spills. Can support lots of storage, but can be very wide, especially on the exhaust side.
• Installing touring panniers. With small inconspicuous side rails. Those are intended for road use, basically the same hardware as on the 790 Duke,  sit very high, and are less robust than proper adventure side rack. If you don’t plan to do any off roading this may be a good choice.

KTM offers side racks, Touratech panniers, and touring panniers. See the KTM luggage page.

Third party options below.

AndyStrapz

From Australia, they make saddle bags and support frames down under (Frame AU$400, with two large bags AU$850).

Bumot

Bumot (Based in Bulgaria) makes a complete setup for the 790 ADV with racks, various top box, hard or soft panniers… See a happy customer review. All BUMOT panniers system are symmetrical, aka the pannier on the right side is smaller. Four options for pannier systems for KTM790, 3 hard, one soft:

• 35L / 31L – Width 92 cm
• 40L / 36L – Width 98 cm
• 45L / 41L – Width 104 cm
• Xtremada soft panniers are 35&31L and the width is almost same as 35&31L hard panniers – about 92cm.

Enduristan

Very nice soft luggage from Switzerland with a lot of offerings, all waterproof. The Blizzard soft saddlebags fit fine, under or over the seat. The Tail bag is a great mini-top box for offroading. The monsoon can be attached to side racks. Their tank bags are nice, for road use with a need for a lot of volume the 4A with its concave bottom is a good fit; For off-road smaller sizes like the 4H or 4S give more space to the rider. The French dealer has a specific page for the 790 ADV with pics.

Giant loop

They sells rackless U shaped bags of various sizes (handles needs to be removed for those, they also sell a set of spacers to do so) and also offer mototrekk soft bags to install on any racks. US based.

Happy Trail

Paniers and rack from a small company in the US.

Hepco-Becker

Paniers rack, associated panniers, top cases, racks, crash bars… German quality.

Holan

From Poland, Holan is another alternative. With racks and panniers. Very narrow solution. And they list widths and weights for their options which is nice. Early models used to require the removal of side plastics, this has been updated.

Kriega

UK based Kriega has a complete soft luggage solution with bags for all purposes. I’m a fan of this page in German just for the pictures of the Kriega/Enduristan setups Light/Adventure/Touring/Campervan 🙂

Kriega released a specific OS-Platform Base for KTM Adventure bikes, which is perfect for the 790. Available at your retailer (france for example) but not yet listed on Kriega web site.

Mosko

US based Mosko makes a variety of luggage as well, the rackless Moto R40 / R80 have been recommended on the forums. U shaped luggage like those works better once the handles are removed (replace them with spacers) and will scratch the hell out of the plastic.

Outback motortek

Makes two type of racks, with or without rotopax mounts and tabs. ($210/$300 depending on model). Apparently not compatible with the Akrapovic exaust.

Rade/Garage

Rade/Garage is making panniers racks designed for solo riding, their racks move the pannier lower and forward compared to other providers, making for a better weight distribution. €250 for the racks.

Rockfox

From South Africa, makes panier racks, with multiple options as for width, finish, and attached bags.

SW-Motech

German SW-Motech published their full 790 ADV part list, and it is very long. Or interest are the quick disconnect pannier rack. Distributed worldwide.

Tusk

US manufacturer of racks and panniers. From $375 to $460 for a complete set. The Pilot soft bags ($149) are good for the price to attach on any racks (but not waterproof).

Tank bags on this bike may be intrusive: the top of the tank is small, the opening is very close to the handlebar. Bags mounted on a quick lock around it may interfere with the handlebar. Double check fit before buying.

The KTM options are first the 18-litre tank bag (p/n 75012919000 about £139). This is not waterproof, an inner bag supplied.

Another KTM option is the 13-16 litre QuickLock tank bag (p/n 63512919000 about £175). This is not waterproof, rain hood supplied.

Some of the best tank bags for the 790 available by Enduristan. All are fully waterproof by design. For road use with a need for a lot of volume the 4A with its concave bottom is a good fit (13L expandable to 20). For off-road smaller sizes like the 4H (7L) or 4S (7 to 12 L) give more space to the rider. Pics are available for all models here.

The wolfman enduro tank bag has been reported as a good fit as well. Small at 6L, but well designed.

GIVI released a tank bag mount (€70) to clip any of their bags. But it’s far from ideal, I guess it’s good only if you already have a giv bag and want to reuse it.

As always there is a thread on advrider about it.

The choices are:

• Go with saddlebags with no hard support. Cheaper than the other solutions, but these will scratch the sides, and volume will be limited.
• Installing a scaffolding to get side rack in place. On the racks one can attach aluminium boxes or soft bags. This also has the side effect of protecting the back of the bike and most notably the exhaust in case of spills. Can support lots of storage, but can be very wide.
• Installing touring panniers. With small inconspicuous side rails. Those are intended for road use, basically the same hardware as the 790 Duke,  and are less robust than proper adventure side rack. If you don’t plan to do any off roading this may be a good choice.

KTM offers side racks, Touratech panniers, and touring Panniers. You can mount third party bags and panniers on the touratech rails. See the article on third party luggage for non-KTM options.

Black aluminium Touratech panniers for KTM

Touratech side racks are needed, p/n 63512912044 at about £235.

Then add the two side boxes p/n 63512922000 (45 litre) and 63512923000 (31 litre) which are about £393 each

Add the locks (they can be keyed to be the same as the top box)

Total cost £1020. Cost of the complete Touratech setup (side case plus top box) is > £1600.

Warning: this setup is really wide; this makes the bike 106cm wide

Touring Case Set (panniers)

36 and 30 litre, p/n 63512932044, about £700. Needs mounting rails, p/n 63512012044 about £209. Total cost £909.

The rear rack shipping with the bike is not great. Attaching a roll bag is not obvious: attachment points are not aligned and only on the side… The attachment points are the same as the KTM 1X90, most racks for those bikes should fit on the 790 (warning however: the length of the bolts are different, 1X90 bolts are too long for the 790).

There are two common uses for a rear rack: Attaching a soft bag sideways or lengthwise, or clipping a top box.

With KTM parts the first thing is to get a carrier plate (P/n 60612910044) for £113. And then plonk on it another parts depending on your needs:

• Rear rack: A very large rack with a lot of attachment points to put any kind of bag.
  • Rack: (P/n 60312978044) costs £87. This rack is very wide.
  • Carrier plate (P/n 60612910044) for £113
  • Total ~£200
• KTM 48L top box. Basic top box :
  • Top box itself (P/n 62012927000) about £261.
  • Carrier plate (P/n 60612910044) for £113
  • additional carrier mount (P/n 60312927000) on top of the plate, about £43,
  • Total ~£425
• KTM touring top case, a smart looking 36-litre top box
  • Top box itself (P/n 63512929544) about £437.
  • Carrier plate (P/n 60612910044) for £113
  • Total £550.
• Black aluminium 38L Touratech top box:
  • Top box itself (P/n 63512929044), about £393
  • Carrier plate (P/n 60612910044) for £113
  • This needs an additional carrier mount (P/n 63512927044), about £87
  • Don’t forget the locks, they are not included in the price.
  • Total £600+

Third parties do excellent solutions in this space, simpler and cheaper.

For example the perun moto rack allows for mounting with or without the handles, and can be accessorized to mount various top boxes from Givi/Kapa/Rotopax/SWMotech/Kriega… $129 plus shipping from Serbia ($32 for Europe).

Bumot makes a rack and an aluminium topcase for a little less than €400 in two sizes (30L or 43L) and various finishes.

BDCW also makes a simple aluminium rack for $175. This one requires the removal of the handles.

SW Motech has tons of products for the 790.

Outback motrotek and Altrider are both making luggage racks.