‘DON’T REBUILD IT IN THE PADDOCK’
Thanks to replication, there are more G50s and G50-powered racers now than there were in the ’60s. Expect to pay £30,000 and up for a sound period machine; a new engine costs £7000-20,000. You can opt for a shortstroke variant or even four valves, but check eligibility if you intend to race. The Seeley frame’s superb handling is favoured for historic racing, but not admitted to the Lansdowne Cup series, which also bars short-strokes.
Stuart Tonge made this customer’s unit available to us. Stuart is vastly experienced and takes a week to rebuild a G50 engine, provided there are no delays with parts or outside services. “Absolute cleanliness is vital. Don’t try to rebuild this engine in the paddock,” he advises. “It is crucial that everything is measured carefully and fits properly.”