Originally Posted by mopedjay
if its bogging its running too lean check the air filter
its a chinese carb so pull the jet out and see if theres anything blocking it i have seen some jets on china carbs that were not even made right
if the racing carb is what i think it is its a cheap copy of a dellorto sha 14.12 it should take std dellorto jets
you can buy new jets from treatland.tv its a moped parts store
Please 'splain to us how an air filter can make an engine run lean.