1. Vehicle weight: The total weight of the go-kart, including the driver and any cargo, affects its speed. A lighter go-kart will be able to accelerate and reach a higher top speed more quickly than a heavier one.
2. Gear ratio: The gear ratio between the engine and the wheels determines how much torque is applied to the wheels and how fast the go-kart will accelerate. A higher gear ratio will result in a higher top speed, while a lower gear ratio will provide better acceleration.
3. Aerodynamics: The shape and design of the go-kart can affect its aerodynamics, which can impact its top speed. A go-kart with a streamlined body and low drag coefficient will be able to reach a higher top speed than a go-kart with a more boxy design or high drag coefficient.
4. Tire size and traction: The size and type of tires used on the go-kart can also affect its speed. Larger tires will have a greater contact area with the ground, providing better traction and allowing for higher acceleration and top speed.
5. Driver weight and experience: The weight and experience of the driver can also have a slight effect on the go-kart's speed. A heavier driver will add weight to the go-kart, affecting its acceleration and top speed. An experienced driver may be able to optimize the go-kart's performance and reach a higher top speed than an inexperienced driver.
Taking all these factors into consideration, a go-kart with a 3.5 hp engine can typically reach a top speed of 25 to 30 miles per hour (40 to 48 kilometers per hour) on a flat, paved surface. However, some go-karts with more optimized designs and higher gear ratios may be able to reach speeds of up to 40 miles per hour (64 kilometers per hour) or more.
