Ballast consists of additional weight strategically positioned on the kart to achieve optimal weight distribution and meet minimum weight requirements as specified in class regulations. Proper ballast placement is crucial for handling balance, with even small adjustments of 1-2 kilograms making noticeable differences to kart behaviour through corners.
Common ballast applications:
- Meeting minimum combined kart and driver weight requirements
- Adjusting front-to-rear weight distribution for handling balance
- Compensating for lighter drivers in classes with minimum weight limits
- Fine-tuning left-to-right weight distribution for specific circuits
Ballast typically takes the form of lead weights or specially designed ballast blocks that mount securely to the chassis using bolts or clamps. Regulations specify maximum weights, mounting locations, and securing methods to ensure safety. The general target is approximately 43% front and 57% rear weight distribution, though this varies by class and conditions. Ballast must be painted in a bright colour and clearly marked with the driver's competition number for identification during technical inspection.