older age Newbee

Hi all im head mechanic & bottle washer for my sons new set of wheels 50cc Chinese import lexmoto echo
cars i understand as spent most of my life fixing then & trucks
but bikes is a totally alien word to me so please be gentle on some of the bone questions i may post as whats obvious to you is complete different plant to me

 

thanks just need to sort this loose wire out and his bike may run better

 

Welcome..I'm not new to bikes but I'm learning from people on here.ask away..no ones gonna laugh..I'm 60 by the way