Now that you have the steering system in position, you can button up the hole project by covering the bottom of the go kart. Sheet metal (like furnace guys use) is the best option. Buy some tech screws (the ones with drills on their ends) and zip through the sheet metal into the tubing. Once you have that in place, you don't have to worry about your feet hitting the ground!
Now it is time to place the brake system. You notice we placed the brakes in place on the live axle, now the actual braking mechanism needs to be mounted to the frame work. You can either weld it, or bolt it to the frame. I prefer bolting, it is more forgiving and easier to repair.
A word on brake float: The brake system should float. What that means is that the disc either needs to be mounted freely on the shaft, or the brake caliper needs to float. If the neither is floating, you will get a binding, and prematurely worn out brakes, and fast! So keep that in mind. Something has to float, the disc or the brake caliper (1 of the 5!)
For your brakes it is important to have the brake off while driving. A good spring is needed to keep the pedal back when the brake is not being used.
On a wood go kart be sure to use the same thought into the brake system. A lot of force is going into the brake boards so be sure to account for this in the brake mechanism which usually involves force multiplier linkages.
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