mcman56 Posted November 10, 2008 Report Share Posted November 10, 2008 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 Link to comment Share on other sites More sharing options...
nigelog Posted November 11, 2008 Report Share Posted November 11, 2008 (edited) 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 November 11, 2008 by nigelog Quote Link to comment Share on other sites More sharing options...
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