Why a 400cc EFI Utility ATV Belongs on Your Floor: A Dealer's Guide to the SUMAHAO S400

The short answer

A 400cc-class utility ATV is often the easiest machine on the floor to match to a customer. It is big enough for real work and compact enough for tight trails, sheds and trailers. The SUMAHAO S400 fits that brief with a 400cc Bosch EFI engine, 2WD / 4WD / 4WD lock, standard EPS, 280 mm of ground clearance and a 240 kg maximum payload.

This guide is written for dealers and importers. It walks through the specs your customers will ask about, explains what each one means in plain words, and lists what to confirm with us before you order.

Who walks in asking for a 400cc utility ATV?

This class suits buyers who want one machine for chores and for riding. Think of a property owner who moves tools and feed during the week and takes a trail ride on Sunday. Or a first-time owner who wants four-wheel drive but does not want a full-size machine.

These buyers usually ask the same things. Is it easy to steer? Will it get through mud? How much can it carry? Will it start every morning? A good stocking choice answers each of those with a number, not an adjective.

What is under the seat?

The S400 uses a 400cc, 4-stroke, single-cylinder, SOHC, liquid-cooled, 4-valve engine. Maximum power is 25 kW at 7,000 rpm, and maximum torque is 42 N·m at 5,500 rpm.

Fuel is metered by Bosch EFI, and starting is electric. For a dealer, that pairing matters. Customers who have owned older carbureted machines tend to remember hard cold starts. EFI with electric start is an easy point to show on a test ride.

The transmission is a CVT with park, reverse, neutral, high and low (P/R/N/H/L). Low range is there for heavy loads and steep ground. High range is for getting home at the end of the day.

The S400 is sized for buyers who want a capable, easy-to-handle ATV for mixed work and trail use.

How does the S400 handle mud, ruts and slopes?

Three specs do most of the work here: drive modes, ground clearance and suspension.

2WD / 4WD / 4WD lock. The rider picks 2WD on firm ground, 4WD when the surface turns slippery, and 4WD lock when traction gets harder still. That is an easy story to tell at the counter: one switch, three choices, matched to the ground.

280 mm ground clearance. Clearance is what keeps the machine off rocks, roots and ruts. Give customers the number in millimetres. It is more convincing than words like "high".

Double A-arm suspension, front and rear. Both ends use double A-arms with oil-gas shock absorbers. That lets each wheel follow the ground, which helps keep the tyres in contact on uneven trails.

A 1,250 mm wheelbase. A wheelbase of this length suits narrower trails and tighter turns around yards and buildings. The minimum turning radius is 3.75 m.

Why does standard EPS matter for a 400cc machine?

Electric power steering (EPS) is standard on the S400. That is worth pointing out early, because many buyers expect power steering only on bigger machines.

With a dry weight of 367 kg, a four-wheel-drive ATV can feel heavy at low speed, over rocks, or when the front is loaded. EPS lightens the steering, so a long day in the saddle is less tiring. It is standard on the S400, so every test ride includes it.

How much can it carry, and how far can it go?

The S400 has a maximum payload capacity of 240 kg. Make sure customers understand this is the total payload figure for the vehicle.

Front and rear racks give tools and gear a place to ride. The 25 L fuel tank means fewer stops between the job and the ride home.

Here are the key working numbers in one place:

• Engine: 400cc, single-cylinder, liquid-cooled, 4-valve
• Max power / torque: 25 kW @ 7,000 rpm / 42 N·m @ 5,500 rpm
• Fuel system: Bosch EFI, electric start
• Transmission: CVT, P/R/N/H/L
• Drive mode: 2WD / 4WD / 4WD lock
• Ground clearance: 280 mm
• Wheelbase: 1,250 mm
• Dry weight: 367 kg
• Max payload: 240 kg
• Fuel tank: 25 L
• Brakes: dual 210 mm discs, front and rear
• Wheels and tyres: 12-inch aluminium alloy rims; 25×8-12 front, 25×10-12 rear
• Steering: EPS, standard
• Display: multifunctional color digital display

What about brakes, wheels and the dashboard?

Brakes. The S400 uses dual 210 mm disc brakes at the front and at the rear. Disc brakes at every wheel are easy to point out on the showroom floor.

Wheels and tyres. Rims are 12-inch aluminium alloy. Tyres are 25×8-12 at the front and 25×10-12 at the rear. Ask us which tyres ship with your market configuration if your customers ride mostly in mud, sand or snow.

Dashboard. A multifunctional color digital display sits in front of the rider. It comes alongside standard EPS and Bosch EFI.

How do the S400 and S700 differ for your customers?

Treat them as two answers to two different customers. The S700 is the larger machine in the range. The S400, with its 1,250 mm wheelbase and 890 mm seat height, is built for buyers who want easy handling and mixed use.

Stocking both lets you match the machine to the job the customer describes. The full S400 specifications are on its product page at sumahao.com/atv-400/specifications/.

What should you confirm before ordering?

Use this list with any supplier, including us.

• Can you send the current full spec sheet for my market?
• Which equipment is fitted to the configuration you will ship to my country?
• Which colour options are available? (The S400 is currently shown in orange.)
• What paperwork comes with each vehicle for import into my country?
• Which wear parts should I stock alongside the first vehicles?
• Who answers my technical questions, and how?

Our spec page itself asks buyers to confirm the final configuration for their market before ordering. That is good practice with any supplier.

Key takeaways

• The S400 combines a 400cc Bosch EFI engine with 2WD / 4WD / 4WD lock and standard EPS.
• 280 mm of ground clearance and double A-arm suspension help on rough ground.
• A 240 kg maximum payload and 25 L tank suit working days.
• A 1,250 mm wheelbase makes it the more compact, easier-handling choice in the SUMAHAO range.
• Always confirm the final configuration for your market before ordering.

Next step

If the S400 looks like a fit for your customers, tell us about your market and the jobs your buyers do. Use the enquiry or dealer buttons below, and we will help you confirm the right configuration.