Common issues on Duke 390s: Randomly dies (probably fuel injector mapping issues). Can get super annoying. Mine did this on a downshift, but randomly resolved itself after 500 miles. Condensation in the dash. Overall not that great build quality/consistency. Oil gets dark rather quick after a change. 28 Location: New Zealand Hi all I’m about to pick up my 2023 790s this week and I’ve been reading lots threads about these bikes. Lots of comments about reliability and QC. Common issues with soft cam shafts, immobiliser and side stand switches. Despite this, the bikes keep selling. KTM 790-890 Duke Issues And Problems. Have an issue with your 2018+ KTM 790 Duke? Share and discuss all related problems. The suspension is just the right fit for the 790 Duke – some rougher roads may upset the applecart, but that’s going to cause issues across the motorcycling spectrum. Track time Save for a 30-minute afternoon final ‘shakedown’ at the end of the day, part two of the 790 Duke launch was on a local race track. But yeah, check bolts, don't overfill oil etc. Depending on the Duke model it might have the common seal problem behind the front sprocket - haven't seen this issue on a Duke 4 yet, if that's the bike you have. They're pretty bulletproof, these things. Wonky electrics have been bothering KTM earlier, and this is one of the first CANBUS systems The dealer said this is normal for the 790, at least it is known that more 790 engines have the same sound. Last week at the Zandvoort track (Duke is 2 years and 4 days old with 8400 km) in my second lap I heard a “poof“ sound and the engine went dead. The engine rotates when the starter button is applied but won’t start. Would stick with the Street Triple RS. Problem is, it's sold out everywhere. I believe dukes 790/890s are made by CF Moto in China, India makes 390s,200s, 250s,125s (rc,duke, adventures) First gen single cyl engines had a lot of problems but after 2017 I believe they fixed all the issues with the bikes. To KTM 790 Duke το είχαμε οδηγήσει αρχικά στην πίστα των Σερρών, εκεί όπου φάνηκε εύκολα και το πεδίο της αριστείας του -η πίστα. Καθόλου τυχαία δεν ονομάστηκε ως νυστέρι από την ΚΤΜ, με όλα τα στοιχεία πάνω του να συνθέτουν BGcX.