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What Compression Ratio For C15?

mcman56
in Pre-65 Bikes

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What compression ratio should be targeted for a C15 intended for trials? It is a 1960 C15S. The available range seems to go from 6.5 to 10:1. It looks like early C15T had 6.5:1 and later models had 8:1.

  • Quote

    Hi mcman

    my bike is not dedicated trials but previous owner for some reason chose B25 piston and compression ratio landed at 8.75:1

    Useful link here for calculating

    Visit Puma Tech

    Edited by nigelog

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