All stock and stock gearing, you might squeeze 55-57 mph out of it. If ou throw a 14t front sprocket on her, then probably 62-64 mph. With a 14t up front and a 38 in the rear you might be doing close to 68-70. Stock gearing is 13/40 gearing. Going up in front and down in back will increase top speed, down in front, up in back will decreases speed but give a feeling of more power. But i wouldnt suggest changing sprockets on a fully stock motor because you will lose lots of torquey power.