I am interested in buying a 2 seater in the 600 range can you advise me i am in Uk will the bike come restricted to 25 mph as am wanting to use it mainly on road and 25 mph is a bit slow or can this be changed once received sorry newbie not wanting to spend large amount of money on something thats going to go just 25 mph and not do what i want it to do thank you in advance much appreciated am in the Uk also