February 10, 201016 yr A short Youtube film showing a brief history of trials and George Silk explaining his new gearbox-probably from the 70's?-a 4 speed with high and low ratios.Does anyone know of these Silk machines today?Engine seems similar to the Alta Gaunt Suzuki in the previous thread,the bike like a Montesa. Edited February 10, 201016 yr by anyoldiron
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