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4-Stroke Ported Head(YZ450F)

The exhaust ports and the combustion chamber are smoothened and brought to a full polish. The Intake ports get the rough casting flaws removed and finished with glass bead. Removing casting flaws and polishing will gain significant power in midrange and top-end without loosing any low end power. As a final step we resurface the gasket area to ensure proper sealing of the head gasket.