Need some advice... (Puch Magnum MKII)
What do you do when you need a jet that is "in between" sizes? My stock jet is a #60. It will do 30mph and then "4-stroke." If I put a #58 jet in, I can hit 34, but you can tell it is running lean as there is a slight bog at full throttle. There was a small hole drilled in the air cleaner and I imagine it was done at the factory. I plugged it, and the speed dropped to 25mph with the stock 60 jet. I re-opened it and drilled another small hole right next to it. The speed is back to 30.
The guys at the moped warehouse correctly diagnosed another problem...
I have a replacement Bing 15mm carb on it. They said the nozzle and needle are different on those carbs and I need to run it with the stock parts. <very smart, those guys at the warehouse> I did that, then experimented a little. If I run the stock nozzle with the new needle, it will lean out slightly right before full throttle. I am running it this way as I can run up to 30 with it "floored" then back it off just a bit to hit 34. Is this a logical fix for an in-between jet?