The ATK Brake bar as used on the ATK Start, Classic and Sport models. This is now available as a spare and can be added to your DIY Kit pack as an optional extra.
The pack includes a brake bar, brake bungee cord, 4 bolts, fixing plates, nuts and washers.
How you fix this though depends on the style and specification you go with. We have made this available due to requests from customers who have built their own karts.