This is the Puch Bing jet that works on all the 12mm, 14mm, 15mm Bing carbs found on Puch mopeds. Also fits the Encarwi carbs found on Tomos and Batavus mopeds. Maybe some Trac.
For tuning tips, check out Garage. The worlds largest moped build database. Use Garage as a guide to what jet you need.
Here are some builds that use the Bing, and this Jet: Bing Builds
You can look at the jetting used by builders as a starting point for what you need.
