BWS50 2JA tuning engine 70cc. Big bore 47mm, crankshaft 41.4mm +2.2. Powered by BWSP.

Описание к видео BWS50 2JA tuning engine 70cc. Big bore 47mm, crankshaft 41.4mm +2.2. Powered by BWSP.

Engine tuning of Yamaha BWS50 2JA to 70cc. Installed spare parts: big bore cylinder kit 47mm, crankshaft 41.4mm +2.2 longer stroke, light weight flywheel rotor ignition.

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