Q. Is KTM 390 Duke suitable for long drive with pillion rider?

It's perfect.At 61 years, my wife and I ride from Pune to Lonavla and beyond.Roads should be perfect, because you travel at a minimum speed of 80 kms and touching upto 125 kms.It's easily capable of touching 160 kms / he.But my age and roads are not made for rides above 80 kms I generally ride at 80 - 90 - 100 kms per hour.In short it's a perfect bike for two.we reach our destination so quick that we are fresh.Best part is the ABS on both wheels which makes rides very very safe.

It might not be comfortable for the pillion otherwise the rider the totally comfortable. The pillion seat is little bit more higher so at pillion seat men will be comfortable but ladies might have some problem in long rides

If you have less Luggage with you, then its really comfortable with the pillion. But you can go for a long ride with more luggage without pillion.