SuperNats XXVIII

208DAYS

2026 Winter Series

TBA

2025 Pro Tour

35DAYS

SKUSA Mexico

28DAYS

2025 PKC

64DAYS

2025 TSRS

42DAYS

Superkarts! USA - Rulebook & Updates
Rulebook
Please make sure you have the most current version of the rulebook.  A list of the current changes is now included right after the table of contents. All changes in the rulebook are highlighted yellow. We will keep at least 1 year of change logs in the back of the rulebook for reference.

alt 2025 SKUSA RuleBook
Current Version: 4/17/2025
alt Engine Spec: IAME SKUSA Shifter Engine (SSE)
Current Version: 2/25/2025
alt Engine Spec: IAME X30
Current Version: 2/25/2025
alt Engine Spec: IAME KA100
Current Version: 2/25/2025
alt Engine Spec: IAME Mini Swift
Current Version: 2/25/2025
alt Engine Spec: IAME M1 Bambino
Current Version: 5/25/2025 Supplemental Rules
Current Version: 5/30/2023HS-325A Carb Specs
Current Version: 5/25/2025
alt Legacy Spec Honda Shifter Rules
Current Version: 01/01/2022

Rulebook Updates & Clarifications

The updates below generally contain revisions that will be included in the next rulebook update, but didn't warrant an update to the rulebook on their own. When in doubt, please refer to the date the update and the rulebook were published.
1 SKUSA Rulebook Updates: 4/17/2025 Thursday, 17 April 2025
2 Reed Cage System Clarification - KA100 and X30 Monday, 17 March 2025
3 Excessive Carbon Buildup in Exhaust Ports Wednesday, 05 March 2025
4 SKUSA Rulebook Updates: 2/13/2025 Thursday, 13 February 2025
5 SKUSA Rulebook Updates: 10/9/2024 Wednesday, 09 October 2024
6 SKUSA Rulebook Updates: 5/1/2024 Tuesday, 30 April 2024
7 Rulebook Update Thursday, 22 February 2024