The way which these bikes differ to mini motos and mini dirt bikes, is that they usually have larger engines and also have a manual gearbox with gears, as opposed to the mini motos with the centrifugal clutch and automatic transmission.
These bikes are also usually capable of higher speeds, with the standard bikes being able to do around 50 mph and obviously a lot more when modified.
Pit bikes are becoming extremely popular these days with more and more people investing in this sport, as well as many leagues and race venues being set up internationally for these bikes.
The bikes are robust enough to be jumped, and used in quite extreme off road conditions.
They are also built for racing in the terrains.
There are many different companies now producing pit bikes so there are many different bikes available on the market.
These include Orion pit bikes, thump star pit bikes and SSR pit bikes so be sure to check out the different bikes before making a decision on which bike to get.
You must also think about what you will be using this pit bike for, if you are just going to use it for personal leisure and not so much for racing then you will not need to buy a race certified pit bike and therefore will be able to save money.