the stock micros outa the box are stupid slooooooww but dont worry jus spend 25$ and get a speed 300 and a motor plate and it will be as fast as you want it trust me its ballistic with a 300 in it,you will also have to buy steel pinions and steel universals for the front and eiether a frnt oneway or ball diff the front stock diff keeps self destructing with the bigger motor but they are great little cars handle better than the mini zs(still have not seen one even come close to my micro) faster than brp's and theres more stuff out there for em,and this is from a guy who dislikes hpi!