Modern Vespa

I recently reinstalled the motor on my 2013 LX 50 4t 4v. I have accounted for every nut, bolt and screw that I took off the bike when I removed the motor except for these. I can't for the life of me remember where they go. The nut is a "lock nut". It's gotta be from either the electrical or fuel systems. It's not from the motor itself. Anyone have an idea where they go? The bike is running beautifully, so it can't be anything too critical. Thanks!

Can you measure its diameter and length (in mm)? That would help.

The bolt length is 31mm and the diameter is 6mm. Sorry that I left those measurements out.

I was going to search the parts list (https://www.af1racing.com/ProdImages/st3/EVP8000US3.pdf) for an M6 screw or nut, but didn't find any that looked right. Perhaps you would have better luck.

Found it! It goes to the air cleaner. Thank you, thank you, thank you. It's been driving me crazy for the last 3 days.

Hi there. Have a 2013 LX 50 4T 4V as well…just curious why you "re-installed" your engine…Malossi upgrade cylinder kit?…I just installed the Malossi Variator Multivar 2000 kit on mine…the jury is out on it…not 100% happy with the mods

I replaced the original stock Vespa head with a new OEM one. The spark plug hole was stripped beyond repair.

Oh!…was perfect opp to install the Malossi 80cc kit…oh well, I'll tell how it goes when I do mine…

I considered modding the motor, but decided to keep it stock because I have several other scooters capable of highway speeds. Good luck with your conversion.