The manual is not very clear on how to check the chain tension. I mean, at first glance this doesn’t look obvious:
To use this procedure you need the rear lifted from the ground. Use your favorite lifting gear or a center stand or a friend balancing it on the side stand, but not a stand lifting the swing arm.
Then with the top portion of the chain taunt to begin with, you lift the lower chain in the position they indicate at both ends of the B arrows, flattening it out. The gap (‘A’) needs to be 2-5mm (source).
If in doubt prefer a loose chain. At rest on the side stand, the chain should be very slack.
There are as many opinions about tires than they are pilots on the road. What tires to get? Well, it depends. This FAQ will not go into the trap of recommending a particular set.
Here is an exhaustive list of tires, most of them with a size compatible with the 790 (it’s in French, just ignore the text). It goes from 10% off-road to 95% off-road. Each notch sacrifices a bit of road manner to improve some off-road capabilities. Make your own choice.
The 790 Adventure R comes with Metzeler Karoo3 (Due to the M+S status of those tires, speed must be kept under 170km/h (106mph), as denoted by the ‘R’ speed rating in the tire denomination)
Front 90/90-21 M/C 54R M+S TL
Rear 150/70-18 M/C 70R M+S TL
The 790 Adventure S comes with Avon Trailriders (Those are ‘V’ rated, up to 240 km/h – 149mph)
Front 90/90-21 M/C 54V TL
Rear 150/70R18 M/C 70V TL
Both share the same load index, 54 front, 70 rear, meaning a max weight of 212kg (467lbs) in the front, and 335kg (739lbs) on the rear. This should be plenty, and if you buy a new set, it must match or exceed those values.
For example (and this is just an example, not a recommendation!) the Tractionator Rallz are available in the following size:
Front 90/90-21 M/C 54Q TL
Rear 150/70B18 M/C 70Q TL
Right size for the bike, and same load index of 54 and 70. Note that the rear tire is Belted instead of Bias ply for the Karoo3 and Radial for the Trailriders. But most importantly the speed is further limited to 160km/h (99mph) with these tires.
It’s all in the manual, and the same pressure for all models (The S manual doesn’t mention off-road)
The US (and Canada?) got ugly turn signals with halogen bulbs instead of the nice slim LED available in other markets. Probably due to some DOT regulations.
The KTM dealers in the US cannot order the EU parts. It is possible to order the original parts from a shop in Jersey and this come with a replacement flasher relay (otherwise just replacing the turn signals will make them blink very fast).