Am I missing something here??? I have yet to receive my bike, and hopefully I won't be into the carbs right away.... Jim just rebuilt it anyway...So I know nothing about these particular carbs. But the "PJ" is the small jet.... right. Any carb I'd ever touched only has two jets, pilot-main.... so what on your carb is blocked off??? The choke feed???? That would be the other pick up in the bowl on any carb I've ever had my hands on.
I'm looking through the manuals that Jim sent me and they look like a pretty normal set up, besides the slides. But I can't read any thing since they are all writen in Japenese so I cant be for sure....
But if what I'm saying were the case.... You would have one hell of a time getting it to start.... And in those temps, you'd be lucky to get it to start at all.

Steve
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MC21
04 NSR50R
93 CBR F2
98 CBR F3 track bike
95 VFR750
89 FL400R Pilot
90 FZR 4/600