The PZ carb uses 4mm jets main and pilot jets. I've been meaning to edit and upload the footage I have all on pilot jets. The problem is you won't find pilot jets for it. There are tons of M4x0.7 pilot jets, the problem are the physical dimensions. For pilot jets in a nutshell, I bought VM28 jets, and you have to shave 3mm of the threading inside the carb for the jets to be accepted. There is a smooth shoulder above the threading. Vm28 is 3.8mm, stock PZ20 jet is 3mm. You're shaving the shoulder for the pilot jet to actually seat. Otherwise your jet won't be seated and your pilot jet serves zero purpose as it needs to be a tight seal, otherwise gas goes through the threading. So yes. 4mm jets.
Alright. Yeeeeeey! Take us for a ride.
what are your jets?
The PZ carb uses 4mm jets main and pilot jets. I've been meaning to edit and upload the footage I have all on pilot jets. The problem is you won't find pilot jets for it. There are tons of M4x0.7 pilot jets, the problem are the physical dimensions.
For pilot jets in a nutshell, I bought VM28 jets, and you have to shave 3mm of the threading inside the carb for the jets to be accepted. There is a smooth shoulder above the threading. Vm28 is 3.8mm, stock PZ20 jet is 3mm. You're shaving the shoulder for the pilot jet to actually seat. Otherwise your jet won't be seated and your pilot jet serves zero purpose as it needs to be a tight seal, otherwise gas goes through the threading.
So yes. 4mm jets.