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its the "big bore" if you wanna call it that, lol +2mm diameter over the standard, @ 12.5:1 (265cc)
i saw on their website last time i looked that there are both the 265 and 285cc's coming out that will have a 13.5:1 compression, which were not available when i bought these. although i think i would still have chosen the 12.5:1 even if i did have a choice, since the fuel octane in this country isnt great.
W.
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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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