Question: Max Neukirchner currently competes on a sports bike that has been manufactured since what year?

Context paragraphs:
Henry Anglade: Henry Anglade was born in Thionville, in the Lorraine region of France close to the German border, the son of a soldier.  His family moved south to Lyon at the start of the second world war.  There he went to school with a boy called André Camus who went cycling on Sundays and on Thursday afternoons.  Anglade turned down his invitation to join him.  It was his father who suggested that he should go, offering him the heavy family bicycle "that weighed at least 25kg".  He joined Camus and his friends and found they couldn't keep up.  One suggested he should try racing and he joined the Vélo Club du Griffon, the oldest club in Lyon.  That was when he bought himself a Longoni sports bike and tried racing.

Yamaha YZF-R1: The Yamaha YZF-R1, or R1, is an open class sport bike, or superbike, motorcycle manufactured by Yamaha Motor Company since 1998.

Greg Minnaar: Greg Minnaar (born 13 November 1981 in Pietermaritzburg) is a South African World Champion mountain bike racer competing in downhill cycling.  He currently competes in the Mountain Bike World Cup points series races, in the Elite Downhill event.  Minnaar is currently the most prolific winner among male professional downhill mountain bike racers, with 22 world cup career victories.

Max Neukirchner: Max Neukirchner (born 20 April 1983 in Stollberg, Germany) is a professional motorcycle racer currently competing in the Endurance FIM World Championship aboard a Yamaha YZF-R1.

Honda VFR750F: The Honda VFR750F is a motorcycle produced by Honda from 1986 to 1997.  Originally intended as a sports bike to compete with the Suzuki GSX-R750 and Yamaha FZ750 it was reassigned to a sports tourer with its replacement in racing of the Honda VFR750R followed by the introduction of the more rounded 1990 VFR750FL.  The fully faired motorcycle was introduced with a 104 horsepower (77 kW) liquid-cooled double overhead cam (DOHC) V4 four-stroke engine.  All generations of VFR750F since 1990 had an ELF-designed pro-arm single-sided rear swingarm and since 1986 had durable, gear-driven cams.

Kawasaki GPZ305: The Kawasaki Gpz305 was a 306 cc twin cylinder air-cooled SOHC four-stroke motorcycle, produced in 1983 to 1994 by Kawasaki in Japan.  The model evolved from the earlier ER250 model and used an overbored 61 × version of the 249 cc engine first produced in 1979.  Kawasaki gave this model the "Gpz" nomenclature to add to its expanding air-cooled sports bike range, and was marketed as a sports machine.  It originally had chain final drive but in 1983 it had a new Kevlar belt final drive first seen on Kawasaki's American styled cruisers.

Honda CBX250RS: The Honda CBX250RS was a motorcycle first sold by Honda in May 1983 in Japan as their new 250cc sports bike with a view to replacing the popular CB250RS.  The engine was based on the XR series with particular links to the XR350 bottom end, including a six-speed gearbox and the same oil pump.  The stroke is also the same, but the bore reduced to bring the capacity down to 249cc.  The balance shaft was also discarded, with the engine instead being rubber mounted.  Unlike any other XR engine the top was given two camshafts.  The bike was also equipped with dual carburettors, only one of which was equipped with a pilot circuit and which open different amounts depending on how much the throttle is twisted.

BMW R1100S: The BMW R1100S is a sports motorcycle that was manufactured by BMW Motorrad between 1999 and 2005.  Introduced some 25 years after the R90S, the company's first sports bike, the R1100S was the first BMW bike having clip-on handlebars, rearset footrests and a removable cowl to cover the pillion seat.  Producing nearly 100 hp, it has been described as a "sporty sports-tourer".

Klaus Klaffenböck: Klaus Klaffenböck (born 24 July 1968 in Peuerbach, Austria) is an Austrian World Champion in the FIM World Sidecar Championship, and former team-principal of "Klaffi Honda" World Superbike squad running Alex Barros, Frankie Chili and Max Neukirchner.

Triumph Daytona 650: The Triumph Daytona 650 is a super sports bike built by British manufacturer Triumph Motorcycles in 2005.

Supporting paragraphs: Max Neukirchner Yamaha YZF-R1
Answer: 1998