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  1. GSXS 1000 General Discussion
    Hi guys this is my first time on this forum and I've got a question about the Dynojet 02 optimizer. so I just picked up a PC5 and 02 optimizer for my 2019 gsxs1000 and took it to Suzuki to have it fitted, shortly after I had an engine management light come on. Apparently it was a 02 sensor...
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