Hi Harry
Here's a link to the kit I purchased from China...
Motorcycle Repair Kit 38mm For PWK KEIHIN OKO Carburetor Spare Sets One Pack
https://ebay.us/kgSSkW
This fits the Keihin PWK 38 AS1 carb with screw top.
My kit came with a 170 Main Jet, 55 Pilot Jet and a DDJ needle, but to be honest I have thrown these in the bin and I will only use genuine Keihin Jets/Needles.
All the best, Dave.