EN­GINE

Practical Sportsbikes (UK) - - Special Brew -

Roger Mid­dle­ton worked his magic on the mo­tor af­ter oil star­va­tion scored the bores and spun the big-ends. A set of JE +3mm pis­tons raise ca­pac­ity to 440cc. Head is flowed and ported and in­lets matched to carbs mod­i­fied to match an RMKD air­box. Cams are SP pro­file with vernier chain wheels. Peak power now ar­rives 3500rpm ear­lier.

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