hi i have cen mini madness, i just put a novak velocti 3.5 in it could anyone tell me the right gearing for it it just doesnt seem that much faster than the 19t motor it had in before. i cant change the spur on it which 78 in size. im using a 25 pinon on it the moment. what would be the wright size pinon to use for mid and top end performance?
thanks

This is a question you have to figure out on your own. The gearing directly relates to the tires you run, the battery etc. Many things effect this. Just buy about three different pinions and find that happy medium!