The cost of making a go-kart street legal will vary depending on the specific modifications needed, the make and model of the go-kart, and the regulations in your area. Remember that converting a go-kart for street use might not be feasible or legal in some jurisdictions. Always check your local laws and regulations before attempting to make any modifications. To give you a rough estimate, here are some common modifications and costs that could be required to make a go-kart street legal: Headlights, taillights, and turn signals: $100 - $300 Mirrors: $20 - $50 Horn: $20 - $50 Windshield (if required): $100 - $200 Seatbelts or harnesses: $50 - $200 Bumpers or brush guards: $100 - $300 Tires suitable for street use: $100 - $400 Proper registration, insurance, and license plates: Varies by location Please note that these are approximate costs and may vary depending on your area's specific parts and labor rates. Additionally, some areas might require emissions testing or other modifications to meet local requirements. The total cost of converting a go-kart for street use could range from a few hundred dollars to a few thousand dollars, depending on the specific requirements and modifications needed.