I just bought some COPs off eBay for a 2003-2004 R1. According to the list below, these should be Denso COPs. (List states 2002-2008 R1 COPs are Densos).
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"So far, i've run across two types of DENSO COPs. The type that the Hayabusa/GSXR's use work very well. There is another type that is...