Aside from regular oil changes and replacing a few parts (starter gears, clutch basket), little work has been needed to keep the KTM running. Some updates, such as the water pump and clutch shaft, were never even installed! The only no-go problems have been a failed fuel pump, a bad starter solenoid (twice) and a stator that quit. At approximately 50,000 miles, I had the top-end done because the rear cylinder was letting oil past the rings. And now, at double that mileage, puffs of blue smoke are telling me the valve guides finally need replacing. While the engine is out, I’m going all in with crank bearings, pistons and valves!