if i remember right stock 250 suspension is sprung for 120lb geared rider. weighing 170 geared, i run 0.85mm/kg springs up front and i still come close to bottoming out on hard braking. if i remember right, stock front spring rate is around 0.6mm/kg. fine for 150lbs on the street. not fine if you plan on putting a lot of force in corners or braking.
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