Special test on a Rokon 340cc automatic, Jim Hollander of the USA Rokon Manufacturer's team at the International Six Day Trial on the Isle of Man. There were 6 Rokon 340 automatics entered at this ISDT, and Jim was one of 2 who finished this tough endurance competition. 3 Americans (Ron Bishop, Jim Simmons, and Dave Mungenast) and 1 Canadian (Brian Taylor)retired during the 6 days. The ISDT in 1975 marked the first time a competitor was fatally injured - when Bren Moran of New York crashed on an abandoned railroad bed. Late in the bike preparation for the event, the Rokon factory fitted spark screens as required by the ISDT organizers (even though 2-stroke engines do not produce sparks, unlike 4-stroke engines). They then used a locally obtained Castrol two-stroke oil which left heavy carbon deposits on the spark screens, choking off the exhaust. The Rokons suffered severe power loss as the screens were slowly plugged up. After the first Rokon retired and could be closely examined, the clogged screen was discovered. The remaining Rokons had their screens punctured to restore power, but all were running well behind schedule at that point. Jim Hollander and Jim Fogle won Bronze Medals at this Six-Days. The continuously variable transmissions did work extremely well in the muddy conditions, especially on the hillclimbs. Rokon was years ahead of the competition in some areas, running hydraulic disc brakes while all others had drum brakes. The USA made competition bikes were manufactured from 1970 thru 1977. The Rokon factory was closed at a bankruptcy auction in early 1978. Rumor was that the 340cc automatic motorcycle was the financial ruin of the company. Rokon Inc. came back a few years later and to this day in New Hampshire still makes a unique 2-wheel drive explorer type utility machine that it began with in the early 1960 era.