In stock form, most 400cc quads reach about 60–70 mph (95–113 km/h), with some sport-focused models edging toward 75 mph under favorable conditions. Utility 400cc ATVs tend to be slower, typically in the 45–60 mph range. Real-world speeds vary widely based on model, setup, and terrain.
Defining the class and what influences speed
The 400cc quad category encompasses both sport and utility all-terrain vehicles from several manufacturers. While the engine displacement is similar, top speed is shaped by gearing, exhaust, weight, and other design choices. The following sections summarize what to expect and the factors that push speeds up or down.
Stock performance and typical ranges
Stock performance varies by model and year. The following ranges are commonly reported by riders and supported loosely by manufacturer data where published.
- Honda TRX400EX: roughly 60–65 mph (97–105 km/h)
- Suzuki LT-Z400 QuadSport Z400: roughly 60–65 mph (97–105 km/h)
- Kawasaki KFX400: roughly 65–70 mph (105–113 km/h)
- Arctic Cat DVX 400: roughly 60–70 mph (97–113 km/h)
Note: These figures come from owner reports and available data; actual speeds depend on tires, rider weight, and environment.
What factors push speed higher or lower
- Gearing and final-drive ratio
- Engine tuning, intake, exhaust, and fuel mapping
- Tire size, tread, and air pressure
- Rider weight and aerodynamics
- Terrain, altitude, and environmental conditions
- Model year, emissions controls, and rev limiter
Even small changes can alter top speed. A freer-flowing exhaust, lighter wheels, or a taller gear ratio can yield a few mph more, but may compromise acceleration or reliability; heavier riders or larger tires will often see lower top speeds.
Safety, usage, and practical considerations
Speed is only one aspect of ATV performance. Handling, braking, and stability are equally important for safety, especially on uneven terrain or at high speeds. Always follow local laws and wear protective gear. Modifications should be approached with caution and awareness of warranty and safety implications.
Summary
The speed of a 400 quad is not a single fixed value. Most stock 400cc quads sit in the 60–70 mph range, with some models slightly higher or lower depending on gearing and setup. Real-world speeds depend heavily on model year, weight, tires, and terrain, and aftermarket tweaks can push the numbers up modestly at the cost of reliability and safety. For precise figures, identify the exact model and year and consult manufacturer data or verified owner measurements.
How much is a Suzuki 400 quad worth?
Pricing typically falls between $5,198 and $7,719, with an average around $6,649.
How fast can a 400cc four wheeler go?
The Honda 400EX can reach a top speed of approximately 72 mph under ideal conditions. Riders commonly experience speeds closer to 65-70 mph, influenced by factors such as rider size, terrain conditions, and any performance modifications made to the ATV.
How fast is a 300 cc ATV?
50 MPH
Top Speed: 50 MPH – Adjustable to provide a thrilling ride while maintaining safety and control.
How fast does a 500 quad go?
The answer to the question, “How fast can a 500cc quad go?” is up to 70 km/h, depending on factors like weight, load, and terrain. While they aren't designed for high-speed racing, 500cc quads are ideal for those seeking adventure, fun, and a closer connection with nature.