In this video we look at front and rear ride heights.

Front ride height:

Why we would lower:

In the highest grip conditions: longer races, soft compound tyres, or kart is generally sticking to track, e.g. when turning in it feels quite heavy through the steering wheel = too much front and rear grip
To increase our front steer. In lower performance classes (cadets, 4 stroke classes, lower performance junior categories) it can be advantageous to lower the front ride height to help the front steer, while making the back end a bit looser.
This will reduce the kart over-gripping into corners.
This keeps the engine RPM higher
Don’t lower the front ride height when you are already slipping out of the corners, this exaggerates it

Why we would raise it:

In higher performance classes such as KZ, having a higher front end enables us to get more rear traction. Lifting the front places more weight on the rear of the chassis.

How to adjust the front ride height:

Loosen off the kingpin and adjust the spacers
As you lift the stub axle, that will lower the front ride height. Put all the spacers towards the bottom of the kart, with none on top of the stub axle
If you want to go the opposite way and lower the stub axle (which will raise up the front ride height), you put all the spacers on top of the stub axle with none below it
Tighten kingpin bolt

How to adjust the rear ride height:

Remove the bolts from the bearing hanger, loosen off the engine and remove the chain
Lower the rear axle = increase rear ride height
Raise the rear axle = lower the chassis
Most karts have multiple options to adjust, simply find the next slot and re-bolt the bolts to place in desired location.

Ride Height Adjustment