upgrading

Hi could some give me a straight answer on what I need to upgrade my bike from 54mm bodys to 57mm from newer bikes. and could explain how it would work when one bike is man choke and the newer one are auto choke?

Hi. I've got hold of a Sachs shock off an 04 rsvr. Does anyone know if i can just fit it straight into my 09 Tuono? I'm thinkin its probably just a straight swap which will give me compresion damping as well as the standard shocks rebound/preload only.. Also it'll look a fcuk sight better:doug...