Strong, bonkers, addictive, pain in the backside
Mine was a Duke Mk1 Series 3 (yellow/black).
Several PITA electrical issues due to poor connections and broken solder joints.
Starter sprag clutch failure at 12,000 miles. Horrible screechy noises.
Generator magnets detached at 13,000 miles, trashing the CDI. £300 in parts, but an easy DIY job. They all did this at any time between 0-15,000 miles, until finally KTM changed the design of the rotor.
Dellorto carb was very on/off, but the whole bike is like that. It loves to be thrashed. Needs the KTM jet kit, airbox lid and an aftermarket can.
Stolen and written off at 18,000 miles, whereupon I bought a Duke 2 - similar, but a better bike in all respects.
Lots of vibration from the single cylinder engine = double vision at under 4,000rpm.
Excruciating seat. 50 miles feels like 500.
Some rough edges/incomplete development, but huge fun in town and on country roads. Just stay away from dual carriageways and (specially) motorways.
Would you buy another motorcycle from this manufacturer? Yes
Review Date: 1st May, 2012