Cleaning problem of motorcycle carburetor

I don't know if the "oil adjusting needle" you mentioned is the oil needle of the air adjusting valve or the oil needle of the mixed gas. If it is the oil needle of the valve, there is no need to adjust it. If it is a gas mixing screw, it is normal to check whether it is suitable. As long as the adjustment is correct, there will be no problem. If it is impossible to add oil, it is generally enough to clean the air filter and carburetor, as long as the adjustment is correct, it will not increase fuel consumption.