If you have any experience with old Vespas, you will know that it's hard to get good quality replacement parts as a lot of them are from India and aren't really good quality. Such is the fuel shut off lever for the PX125. It has a crown gear mechanism that skips easily. The means the fuel doesn't get completely shut off and it drips out, leaving you high and dry if you wait too long between rides. Not to mention wasting gas and making a puddle in your garage. This is simpler version that works pretty well. The current prototype is made of PLA since that's what I had set up. I think ABS would be better.I printed with 30% infill and 100 micron layer height. Held together with M3x14 socket head cap screws.