Go kart exhaust………….?

Can I put an old gas scooter (It was 49cc) Muffler On a go kart or will this damage the engine because It is too small for it..?

You can do it. I doubt it will damage the engine, but it will reduce the engines performance greatly due to the restrictive exhaust flow.

You can buy a decent muffler for this engine at a garden equipment supply shop. Should be pretty cheap and it will work much better.

Astrobuf