Hello, have 50cc kazuma meerkat. Fix it all up for my son to use, he went off down the fields but came back saying its not running. It will fire up and tick over, but as soon as you try to give it some throttle it wont pick up, its very lumpy , iv had air filter off, clean, iv checked petrol supply and its fine, spark plug out and clean up gap set, now i can only assume since it ticks over that its not electrical, ( may be ) having never had one of these i dont really know where to start. any ideas please,

thanks

Ben

 

Sounds like carb needs cleaned.