Craig’s Motorcycles
Honda CB125J
I ground out the ports, lightened and polished the valve gear, and fitted the little bike with a Yoshimura racing piston. Along with its feathery weight of around 80KG, it became capable of outdoing much larger bikes on twisty roads. Even in a straight line it could keep up with some 250s. A Yoshimura race cam was acquired but never used for lack of better valve springs.
I took this bike racing in the Triplex event at Benalla, as a Swinburne club member. Rain and another bike's spilled oil wrecked the potential for more fun, but it caused a few surprises and earned a first-place trophy for the sub-150 category.
(These days people take CB125Js and similar bikes Bucket Racing: a fabulous low-cost class of road race that originated in New Zealand and has spread to Australia. It's serious stuff!)

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