My moped has quit pulling away from a stop like it used to?
This depends on brand once again, If its a belt driven model (a belt between the pedals and the transfer shaft) it could merely be the belt itself needs replacing. If not belt equipped or the belt isn’t worn badly then its the clutch,either the shoes,hub rubber,bearings,or lack of oil in the crankcase(if so equipped) as with many things on mopeds,you have several types of clutches out there,dry,and wet(inside a sealed engine cover) the dry ones usually wear out quicker than the wet ones(properly maintained and not constantly overloaded) these parts are still available for many models,even most that are out of production,through us and many different sources.