you will need:
1)-12.5 pilot jet,from a mikuni carb.very important on that size only.
2).5 inches of vacuum hose.
3).a plastic vacuum line seperator.
Pull off the hose at the a.p.s.& put the seperator in.
Take the 5 inch hose and put the pilot jet about an inch INSIDE of hose.
Put the 5 inch hose onto the seperator thats already on the other hose,make sure you put the side of the 5 inch hose with the jet in it on the seperator.reconnect the a.p.s with the other side of the 5 inch hose.end of story
and one good mod.remember:
the bike will run good after it warm's up.