i bought my 790 duke sept 2020 and to date i have put 15k on it and more or less used it as a commuter and weekend toy, mechanicly i have had zero problems with it not 1 ! the rider aids is another story! the anti wheelie does not work the abs on the rear was a bit hit and miss but that seems ok now and the traction control is hit and miss at best, i have had it back to the dealer about these
Same issue each time, here’s the scenario: Been riding approx 30 minutes, and as I’m shifting from 4-5 and blipping the throttle, the motor cuts off. Electrical still functioning. 1st breakdown resolution: replaced ECU. 2nd breakdown resolution: reset ECU. 3rd breakdown resolution: updated mapping, reset adaptation values, reset
I also live in a hot country (Hong Kong) and have owned the first gen and second gen Duke 390. I've noticed quite a few improvements in the 2017+ model, the fan cuts in at about 50% on the temp gauge, it's way earlier than the first gen bikes and keeps the bike cooler. The only annoyance is the noise, but it's pretty easy to live.
In a bold move by KTM, the new 790 Adventure (and 790 Duke) As KTM have upgraded the 790 engine you have to assume they will have also addressed any known issues with the motor but reliability

This is perfectly normal, especially if the outside temperature is above 30 degrees. I was in Madrid and I know how heavy the traffic there is. If you can not move more than 60-80 km/h for а longer time, then you can not cool the engine properly. Fans do not do miracles, they only help to blow/cool the radiator faster.

For the price, the Duke offers a lot of positives: outstanding, extremely nimble handling; very good ABS brakes (once upgraded with quality brake pads); competent suspension; a lively motor with remarkable power for the size; excellent tires; racy good looks; and a plethora of aftermarket parts available for upgrades. john san. 54 posts · Joined 2014. #2 · May 22, 2021. I paid about that for my 890R last year. My dealer gave me a deal on the tech pack be cause I buy quite a bit of stuff from them - I think about $475. I've had both the cs shaft leak and the valve cover gasket leak on the right side.
Fresh out of the crate the KTM is nicely finished and the bright orange wheels are fabulous, but our online owners’ reviews of the 790 Duke’s build quality and reliability are mixed, so we
One thing to take into consideration is the drop in value a new duke 390 will experience. 2. IssamSS. •. My country is so weird they so rare and so expessive used one cost about 5500$ and new one 6650$. 1. IssamSS. •. And the mt 07 cost about 7000$ used and 12000$ new. FWSHs.
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    • ktm 790 duke reliability issues