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Opinion. Discusses `worms', or motorcycle racing sidecars. Federation Internationale Motorcyclist regulations; Sidecar design; Front and rear suspension; Braking; Work of Swiss designer Luis Christen.

Reports that Honda motorcycles outperformed Yamaha bikes at the Isle of Man Tourist Trophy (TT) races. Silkolene Honda racers Steve Hislop and Carl Fogarty finished first and second, respectively, in the Formula 1 race. Hislop's Honda CBR600F2 motorcycle; Hislop's victories in the Supersport 600 race and the 750cc Senior TT.

Opinion. Presents the author's analysis of the MkII TA motorcycle races held at Mallory Park and Brands Hatch in England. The MkII TA is a 1991 revival of the Transatlantic Trophy Challenge, an annual Anglo-American competition that lasted from 1971 to the early 1980s. Reasons why the Americans raced so badly this year; British and American teams, racers and their motorcycles.

Opinion. Discusses the future of European single-cylinder motorcycle racing. Odds against low-cost racing; Factory support versus privateers; Gilera's Piuma motorcycle; BYRD RO1 motorcycle.

Opinion. Describes the 1991 Isle of Man Formula 1 Tourist Trophy (TT) motorcycle race. Winner Steve Hislop, 29; The mountain circuit's dangerous roads; Deaths and injuries; Mileage figures; Use of interval starts; Future of the race.

Opinion. Argues against the motorcycle licensing and safety regulations proposed in the European Economic Community's 1990 report from `The High Level Expert Group for a European Policy for Road Safety.' United Kingdom's licensing procedure; Japan's strict licensing rules; Air bags and other safety devices.

Opinion. Examines Norton Motors' financial problems. Norton Motors is part of the British Norton Group, a conglomerate with property and engineering interests. Research-and-development costs; The Norton Group's purchase of FUS, a Germany fastener company; Norton's rotary engine; Possibility that Norton Motors may not survive.

Reports that a recent auction of a private motorcycle collection at Christie's (London, England) brought in far less money than was originally anticipated. Discusses the prices for a selection of MV Agusta fours, a Munch Mammoth 1200 TTS, a Laverda 1200 Jota America, and other motorcycles.

Describes the Norton F1R racing motorcycle. In spite of financial woes, Norton is going ahead with development of its rotary road racers. F1R's P57 engine; Improvements such as forced-draft induction.

Opinion. Examines various problems facing Grand Prix motorcycle racing. Lack of riders and sponsors; Expense of sponsorship; Heavy reliance on the tobacco industry for sponsorship; European Economic Community's rules regarding cigarette promotion; Various proposals, including the use of 750cc four-stroke motorcycles; International Racing Teams Association (IRTA); Racing Organizers and Promoters Association (ROPA); More.

Opinion. Describes the newly reconstructed Assen motorcycle race track in the Netherlands. 1990 Grand Prix races; Stekkenwal turn; Assen's place in GP racing; Evolution of GP racing after years of disputes between riders and organizers.

Opinion. Praises FIM president Joe Vaessen's decision to drop the FIM (or International) Jury system in favor of a permanent Grand Prix Executive Committee. Reasons for the decision; Criticism of the jury system; Function of the Executive Committee.

Opinion. Comments on the new qualifying rule for 500cc Grand Prix motorcycle races. Examines the new rule's impact on the current lackluster GP racing season.

Opinion. Describes the classic motorcycles and motorcycle parts auctioned off at Sotheby's sale of `Motorcycles and Related Material' at Britain's 10th Annual Classic Bike Show.

Opinion. Discusses the competition between the Japanese Superbike factory teams and Ducati's superbike team in the 1990 European Superbike races. Honda RC30 and Yamaha EXUP OW 01 superbikes; Description of the Ducati superbike.

Opinion. Comments on the latest round of efforts to devise an equality formula for two-stroke and four-stroke motorcycle engines. 1976 equalizing proposals from FIM Technical Committee President Helmut W. Bonsch; 1980 efforts by Dr. Geoffrey Rowe of Manchester University (England) and Dr. Hans von der Marwitz of BMW; The controversy today.

Opinion. Discusses the new TKM engine, designed by Britain's Alan Turney, 35, and the new Lomas-TKM-Harris 125 racing motorcycle currently in development. British motorcycle-frame market; British motorcycle-engine market.

Opinion. Examines the conflict between the Federation Internationale Motorcycliste (FIM) and the International Racing Teams Association (IRTA). Latest rift over the 1990 Australian Grand Prix (Phillip Island, near Melbourne, Victoria); FIM's hierarchal structure and elected commissions.

Opinion. Discusses the reasoning behind FIM rule changes designed to cut the number of starters in 500cc Grand Prix motorcycle races. International Racing Teams Associations' desire to banish privateers. Amount of space occupied by a GP racing motorcycle; FIM grading system.

Opinion. Comments on the failure of Norton's John Player Special motorcycle in World Formula 1 competition. Discusses the British company's plans to develop a production supersports model F1 motorcycle. Domestic success of the JPS Norton; Problems with the JPS Norton's engine.

Opinion. Explains how Team Lucky Strike Roberts has helped Dunlop of England's motorcycle racing tire development program. 1988 tire tests in Australia and Brazil; Racers Kenny Roberts and Wayne Rainey; Pace of tire development at the Grand Prix level.

Opinion. Examines the Marlboro Yamaha Team's search for a motorcycle-racing star to replace Freddie Spencer, who decided to discontinue racing for the remainder of the current season. Spencer's troubled season; Possible successors such as Wayne Gardner and others; Marlboro's racers Luca Cadalora and Niall Mackenzie.

Opinion. Discusses the future of Grand Prix 500cc class motorcycle racing. Recent meeting between the FIM and the manufacturers; Japanese manufacturers' views concerning four-cylinder racing technology; Superbike racing; Caviga and Bimota motorcycle makers; Need for training ground for GP racers.

Opinion. Discusses the reasons for three Grand Prix motorcycle riders' strikes. Focuses on the May 1989 strike at Misano, Italy. Division between the factory riders and the International Racing Teams Association (IRTA); Position of the Federation International Motorcyclist (FIM); Strike leaders.

Opinion. Discusses the Big Teams, top-funded and sponsored motorcycle works teams organized as the International Racing Teams Association (IRTA) and their power to influence motorcycle circuit managements. Examines the rivalry between Britain's Brands Hatch Circuits and Donington Park over the 1990 and 1991 British Grand Prix races.

Opinion. Examines problems besetting the World Superbike Series of motorcycle races. Privateer racers' difficulties finding motorcycles which can compete with factory models; Bankruptcy of Sports Marketing Company of New Zealand; Emergency measures introduced by the Federation Internationale Motocycliste.

Opinion. Examines the complicated structure of British motorcycle racing's event classifications. Inability of the Auto-Cycle Union to formulate a consistent racing policy; Eight classes in the ACU British Championships; Motor Cycle Association's Star Championships.

Opinion. Discusses the British-based Imperial Tobacco company's sponsorship of the Norton Formula 1 racing motorcycle, the John Player Special Norton. History of the sponsorship; The JPS Norton's Wankel engine; Norton's racing team.

Opinion. Discusses the growth of classic motorcycle road racing in Great Britain. Classic Racing Motorcycle Club; Racing classes and types of motorcycles used; Use of modern replica motorcycles.

Opinion. Examines nationalistic identification with various motorcycle makes and racing riders in the US and Europe. Japanese motorcycle dominance; Anti-Japanese feeling.

Opinion. Discusses reaction to the recent racing success of the British Norton-Wankel motorcycle, a cycle with a rotary engine. FIM's reaction to rotary engines in competition; Comments by Norton runner Trevor Nation.

Opinion. Discusses the 250cc racing motorcycles made by Honda and Yamaha. Factory production versus `privateers;' Problems with factory bikes on the racing circuit; Whether or not Honda and Yamaha will end production 250cc racing motorcycles.