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....... with a prosperous trade and repairs in cars, and engines. They develop complete side-cars and -solo, grasstrack-speedway motorcycles. The two brothers are official importer for GM engines in the Netherlands and have a good contact with Giuseppe Marzotto, GM Italy. Wiebe raced nearly 30 years Moto cross and brought a certain amount of riders on the way to the Dutch Championship. The company also distributes transmission Zapf/Wie-Ja carburetor and King Muffler.Under the numerous customers fall the Dutch champion side car racers Matthijsen/Matthijsen as well as the English side-car combination Lester en Anthony Goodwin, Michael v/d Helm, Andy ter Schuur, Shane Colvin and in of the solo class Icespeedway Vice championship master Viatscheslav Nikulin among the most well-known customers that their service get by Wie-Ja. beside the (ice) speedway/grasstrack engines the two brothers also build auto CROSS of vehicles, and supply the drivers with advice.