Mounting a Seat and External Seat Supports

with Justin Stefani
Technical Director for Compkart
What's Needed:
  • Drill
  • 8mm Drill Bit *Do not use a Uni-Bit*
  • Black Sharpie or similar marking tool
  • 5mm Allen T-Handle
  • 13mm Wrench or Socket/Ratchet Combination
  • Seat Jig
  • Metric Tape Measure
  • Large adjustable wrench
  • 3-5 #219 sprockets or similar type shimming system

Mounting a seat properly requires not only the correct tools, but also the correct measurements.  Most all major chassis manufactures provide suitable mounting location(s) for each of their model(s) chassis.  Depending on the category, driver size, and type of tires used; manufacture settings are typically accurate and work well.

In general we set all our seats in a standard position depending on the category and tire type being used.  Normally, the only time the seat is moved is for driver size, which would be common if a driver is very short in height.

A good rule is that moving the seat forward increases the percentage of weight placed toward the ‘front axle’ centerline.  By moving a seat more toward the front of the chassis you will improve the steering and the opposite is true for moving the seat to the rear – more rear-end stability. 

In this video, you will see a seat being mounting in a 2014 Tony Kart EVK DD2 chassis.  We mounted a Tillett T-11 ‘VG’ seat for our driver Alessandro Bressan.