Classic Bike (UK) - - News -

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.”

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