with the custom/aftermarket exhaust i think you will most likely need to upgrade to #40 pilots... quite a few people have changed that after replacing the air filter, and using a full exhaust system. wouldn't want the needles to fall out due to turning them out too far!
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Kawasaki Z250, Bored up to 300cc with 12.8 CR, 41hp at wheel 27nm torque, Two bros full exhaust with DB killer
Dynojet Power Commander V, KnN Open filter, intake and exhaust ported, Puig Windshield
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