A professional overhaul of the BMW R26 engine restores the power, reliability and smooth running of this classic single-cylinder engine. The engine is completely dismantled, checked and reassembled with new bearings, seals and reconditioned components. The cylinder and pistons are reconditioned and the valve clearance is precisely adjusted. The result: low oil consumption, clean starting and a durable engine that is true to the original and retains its full value.