Recent content by mattiebost

  1. M

    Yamaha XS750 Jetting (K&N filters)

    Added open K&N air filters to my XS750. It didn't run good before, but after the change it got even worse! I followed some kind of guide from this forum. And I upsized the following: Main jets: 135 - 140 Pilot jets: 42.5 - 45 Still ran like crap. Trough the whole register. THEN! I duct taped...
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