sorry for the late reply..
the real pz22 is made by dekni of china .. its a keihin authorized manafacturer in china for the region and its biggest manafacturer of carbs for small engines.
the pz22 is used in 72cc (hero etc) .. 97cc (like qingqi etc) and 110cc (like united etc)
there are three types of pz22 available that i am aware of ..
1: the high copy (which i am using in my alter 107cc bike .and its giving me awesome performance .. and avg .. full tunnn speed avg is 45 .. while modest ride gives me 52-53 kmpl.. and of late i have lowered the needle and i am getting horrendous mileage of 60+ kmpl whilst riding on long routes AND in full economy range (50-60km/hr since altered) .. i have obtained this reading on two occassions .. but one one occasion i got i think less then 40 .. and i am sure that was due to the 2numbri of petrol pump.. my personal observation is that petrol pump does matters .. some are awesoem others are SFDSFDSFSFDS
this carb is good but .. wo kahtha ha na . ka phat ka hath ma agai... hahahha . this carb is like that .. iss ka parts nikal athay hain.. quite a few times its main jet has fallen into the float.. somethimes its air screw khud bkhud open ho jatha ha.. vibrations sa .. and the small yell brass pipe sorta thing to which the fuel pipe is attached also comes out .. and there is leak at choke lever places as well ..
solution was to use magic depoxy on the choke lever and the fuel pipe place .. rest is ok after a bit do do hath with it ..
it cost me at that times 900rs .. and its for qingqi 100 and made by SQM .. (btw this compay is doing a sort of nokLa for nokia buziness .. so beware )
2 : this is another breed of pz22 copy .. its like janyan and seems to be made by some sort of good company .. havent used it .. but heared too much good about it .. i came to know about it a year back .. and nowadays it shouldnt cost more then 700 rs ..it has the wording PTF written on place where pz22 should be written .. there is i think no mention of pz22 ..but its 1:1 copy from internals of pz22..
3:this is the janyan pz22 .. the real one made by denki..
its available at qingqi auto spare parts shop.. its real one made by dekni .. i have this one lying un used pin packed with me .. will use it and explain my findings ..
it is available at two shops .. one is Shehzad Autos near committee chowk .. murree road .. they are a bit pricy .. they are sellign it for 1200-1300 ..
another place that has it is in peer vadai .. there is a qabristan on the road that takes one to raja bazar from peerwadai main road ..
just ask on peervadai any qingqi where is the qingqi parts shop they will tell you..
there are two shops one is immediatly in the street .. that is a bit pricy as well ..
there is another small shop .. i think it goes by the name of hajji .. or something .. but that man is realy nice and frank and trustworthy in my experice .. and his price is i think 1000rs ..
rates do vary ..
all pz22 have same internals except jets numberig and may be needle ..
but its not any difficult to find suitbale jets ..
hope this reply gives you some info ..
btw another most important thing is that these carbs have different ventui size so adjust the carb pipe internal dia accordingly .. first i was using stock dhoom pipe which has wide inner dia as compared to stock honda .. then i using drill machine and 35 rs sanding stones ( grinder ka wattay .. mounting stones ) opened its dia and now i am getting awesome response ..
what more to mention ?