i have had my sr 125 for 4 weeks now so far i have got 65 out of it and that was going for about ten miles straight down the expressway if the wind is hitting u or u r going up hill then 60mph is the fastest you will get out of it as for making it go faster i am not sure sorry plz email me if u have got the manual for the bike as i have not got one just so i can ask you for some answers and the specifications for the bike. because i had to guess the specĀ“s from a 250 thanks dan !!!!