Any part of your BMX race bike that fails has consequences, but if your BMX race forks fail the result could be a trip to the medical tent, or worse! So this is one component of you race bike that you should check over closely, and regularly, as forks take the brunt of the big hits and cases. If in doubt after a big hit, we recommend changing them. Better to be safe than sorry.
BMX race forks also come in a range of materials and configurations in the size (diameter) of the steerer tubes and dropout types. This affects both their fitment to the frame and the headset type that you need to run with them. Steerer tubes come in 1 Inch, 1-1/8th Inch and 1-1/8th-1.5 Inch (referred to tapered forks) diameter.
Dropouts are either open 10mm, or 20mm encapsulated. So check that your front hub on your wheel will be compatible with the forks you are planning to upgrade to.
And of course the minimum material of the fork for BMX racing should be chromoly, with carbon fibre increasingly being the material of choice for forks. Carbon forks bring not only weight savings, they bring performance with sharper steering response as a result of increased stiffness.