DYT

I've just bought an MT-03 and am just breaking it in at the moment. This might sound a bit impatient but I'm a bit concerned about it's top speed capability. I'm not going above 4500 revs but in 5th gear it only seems to reach 60mph. I'm not sure whether bikes get faster over time and after it's first 1000 it will pick up? I just can't see where the rest is going to come from and wondered if anyone has had the same experience. Apart from this the bike is great. Lots of fun and to be honest I'm in London so don't to go much above 4th gear anyway (and that's if I'm lucky).