aprilia sr172 carb (phbh28bd) help

just got a rs125 28mm carb but not sure where the vaccum pipe goes. can anyone tell me where all hoses go.
i have connected the throttle cable and fuel pipe, i want to pre-mix fuel now so do i have to block something on carb.

any help would be great, i just want it perfect.

 

Im quite sure the RS125 carb has no vac feed. You have to install your own as close to the inlet manifold as possible, some people even build them onto the inlet manifold rubber itself.

To run pre-mix you must block off the oil feed on the carb.