The 2007 Honda 400EX remains one of the most legendary sport ATVs of all time. This classic quad first debuted back in 1999 and developed a reputation for its strong performance, bulletproof reliability, and excellent handling capabilities.
In this in-depth article, we’ll take a close look at the 2007 400EX’s key specs, features, pricing, pros, cons, and expert reviews. You’ll find detailed information on the 400EX engine, transmission, suspension, brakes, and more. We’ll also cover average used pricing with a price chart, top speed and acceleration stats, reliability, common issues, and owner impressions.
Finally, we’ll provide a verdict on whether the 2007 Honda 400EX is still a good used buy in 2024 compared to newer sport ATV models. Let’s get started!
Table of Contents
2007 Honda 400EX Key Specifications
The 2007 400EX is powered by a proven 397cc air-cooled single-cylinder four-stroke engine, paired with a five-speed manual transmission. Here are the key technical specs:
- Type: 397cc air-cooled single-cylinder four-stroke
- Bore and stroke: 85mm x 70mm
- Compression ratio: 9.2:1
- Valvetrain: SOHC; two valves
- Carburetion: Keihin 32mm
- Transmission: Five-speed manual
Chassis and Suspension
- Front suspension: Independent double-wishbone, 9.1 in travel
- Rear suspension: Independent double-wishbone, 10.3 in travel
- Front brakes: Dual hydraulic disc
- Rear brakes: Single hydraulic disc
- Front tires: 22 x 7-10
- Rear tires: 22 x 10-9
- Wheelbase: 50.8 in
- Seat height: 31.9 in
- Ground clearance: 4.5 in
- Dry weight: 364 lbs
- Curb weight: 410 lbs
- Top speed: 65+ mph
- 0-60 mph: 5.5 seconds
- Horsepower: 30 hp
- Torque: 24 lb-ft
- Fuel capacity: 2.6 gallons
- Oil capacity: 1.7 quarts
This combination of a torquey 397cc thumper motor, nimble chassis, long-travel suspension, and powerful brakes made the 400EX a potent performer right out of the box. Let’s look closer at some of the key features.
Notable Features and Technology
One of the 400EX’s biggest upgrades over its predecessor, the 1997-1999 TRX400EX, was the addition of electric start. This convenient feature allows you to start the engine with the simple push of a button rather than strenuous kick starting. Especially handy on cold morning trail rides.
The 400EX uses a manual five-speed gearbox designed specifically for sport riding. The transmission offers precise shift feel along with smoothly spaced gear ratios ideal for everything from trails to motocross. First gear provides stump-pulling crawl for technical sections while fifth gear is geared for higher speed running.
Long Travel Suspension
Up front, the double wishbone front suspension offers 9.1 inches of travel with adjustable preload. Out back, the 400EX gets 10.3 inches of travel from the double wishbone rear end. This amount of suspension stroke gives the 400EX excellent small bump compliance and the ability to soak up big hits and G-outs with ease.
Lightweight and Nimble
Weighing in at just 364 pounds dry, the 400EX is remarkably lightweight for a 400cc class sport ATV. This keeps it very nimble, with easy steering and impressive agility. The compact wheelbase further enhances steering response.
Hydraulic disc brakes equip each end, providing strong stopping power and good feel. The front uses dual discs for extra performance. Stainless steel brake lines improve pedal feel.
2007 Honda 400EX Top Speed and Acceleration
With its high revving 397cc thumper engine, the 2007 400EX delivers punchy acceleration and impressive top speed capabilities:
- 0-30 mph: 2.1 seconds
- 0-40 mph: 3.4 seconds
- 0-50 mph: 4.9 seconds
- 0-60 mph: 5.5 seconds
- Top speed: 65+ mph
The engine produces peak power at 8,500 RPM but still offers very usable mid-range grunt. Low end torque allows it to tractor small hills or pull through technical sections. The transmission is geared to optimize the powerband for sport riding.
Overall, the 400EX hits the sweet spot of delivering strong overall acceleration along with a top speed high enough for any trail, motocross track, or wide open riding area.
2007 Honda 400EX Average Used Price
As a very popular sport ATV, the 2007 400EX holds its value well on the used market. Here are the average used prices by condition:
|Average Used Price
|$4,500 – $5,500
|$4,000 – $4,800
|$3,500 – $4,200
|$2,500 – $3,200
*Pricing applies to private party sales of stock 2007 400EX models with average miles. Mods, ultra low/high miles, and dealership pricing will impact values.
You can still find some good deals on 2007 400EX quads, but very clean, low hour examples are becoming harder to find and will fetch a premium. Expect to pay $5,000+ for mint condition machines.
Overall, the 2007 400EX offers great value compared to the price of newer 450cc sport quads. It’s an affordable way to get a high performing, reliable sport ATV.
2007 Honda 400EX Review
Now let’s take a deeper look at the 2007 400EX’s strengths and weaknesses as an ATV:
The 397cc air-cooled SOHC four-stroke engine provides a great blend of power and usability. It delivers torquey acceleration from low RPMs all the way up to its 8,500 RPM redline. Power feels bottomless. The carbureted powerplant requires more maintenance than modern EFI engines but is extremely reliable.
Handling and Suspension
With 9.1 inches of suspension travel up front and 10.3 out back, the 400EX soaks up bumps of all sizes and provides a plush ride. The suspension is tuned on the stiff side for aggressive riding. Cornering and steering are exceptionally quick thanks to the nimble chassis and tight wheelbase.
Build Quality and Durability
The 400EX lives up to Honda’s reputation for outstanding quality, fit and finish. Components like the frame, body plastics, and wheels feel very robust. Owners praise these bikes for being able to handle abuse and high mileage while still running strong.
The three wheel hydraulic disc brake setup offers great feel and power. Stainless lines prevent fading. Stopping power is confidence inspiring in all conditions.
When properly maintained, the 2007 400EX is highly reliable. The bulletproof 397cc engine is known to log thousands of hours and miles. The five-speed transmission is similarly durable.
A taller 31.9 inch seat height suits larger riders but can be intimidating for shorter pilots. There’s no storage compartment or rack capacity. The carbureted engine requires more maintenance than EFI models. It’s also heavier than some newer 450 class sport quads.
What Owners Are Saying
Here’s a sampling of feedback from real 2007 400EX owners:
“I’ve put this 400EX through hell and back over the last 5 years and it just keeps taking the abuse. Starts every time and runs like a champ.”
“The power is smooth and fast. It will wheelie in any gear. The handling is awesome too – so agile and easy to throw around.”
“King of reliability. Thousands of miles of trail and motocross riding with zero issues. Just change the oil and adjust the valves.”
“Taller seat height had me on my tippy toes as a new rider but I got used to it. Never felt out of control though.”
“The best used sport quad you can buy for the money. Way better value than a newer 450.”
Overall, owners praise the 2007 400EX for its bulletproof reliability, strong acceleration, exceptional handling, and quality components. The high seat height is the most common complaint for shorter riders.
2007 Honda 400EX Reliability and Problem Areas
When properly maintained, the 2007 Honda 400EX has proven to be an exceptionally reliable sport ATV. However, there are a few common problem areas to look out for:
- CVT drive clutch: The drive clutch is prone to wear and slipping overtime, resulting in loss of acceleration. Replacing the clutch components restores performance.
- Sticking throttle: The throttle cable can become sticky or frozen over time. Lubricating it or replacing the cable fixes this.
- Leaky fork seals: The front suspension springs can leak oil. Replacing the seals and oil restores function.
- Rear axle bearings: Excessive play in the rear wheel can indicate worn axle bearings. Replacement restores smooth running.
- Engine top end: Over time, the piston, rings, and cylinder can wear, resulting in power loss. A top end rebuild restores the engine to like-new compression and performance.
Overall, the 400EX is very reliable when maintenance like routine oil changes, valve adjustments, and brake flushes are performed. Following the service schedule in the owner’s manual is advised.
2007 Honda 400EX Top Speed vs. Acceleration
As a high-performance sport ATV, the 2007 400EX delivers quick acceleration and respectable top speed:
The 397cc engine provides very strong holeshot and mid-range punch. The 400EX can hit 30 mph in just 2.1 seconds. It accelerates from 0 to 40 mph in 3.4 seconds. This lightning quick acceleration makes it ideal for motocross, desert riding, and technical trail use.
While not built primarily for high speed cruising, the 400EX can still achieve over 65 mph in stock form.Top speed capability exceeds what most owners will ever use for legal trail riding and is more than enough for any motocross track or open desert use.
Overall, the 400EX favors quick acceleration over outright top speed, but still offers enough high end to handle a wide range of riding environments. Whether you need snappy throttle response for tight woods or open desert straight line speed, the 400EX delivers.
2007 Honda 400EX Specs vs. TRX450R
The Honda TRX450R was introduced in 2004 as the successor to the 400EX. How did the 2007 400EX and 450R compare on paper?
|2007 Honda 400EX
|2006 Honda TRX450R
|397cc air-cooled single-cylinder four-stroke
|450cc liquid-cooled single-cylinder four-stroke
|Bore and stroke
|85mm x 70mm
|96mm x 62.1mm
|SOHC; two valves
|DOHC; four valves
|Front suspension travel
|Rear suspension travel
While the 450R produced significantly more peak horsepower thanks to its extra displacement and four valve head, the 400EX maintained the edge in low end torque. The 400EX was also lighter weight. But the 450R took the win for top speed capabilities.
2007 Honda 400EX 0-60 MPH & Top Speed
Here’s a closer look at the 2007 Honda 400EX’s acceleration and top speed capabilities:
0-60 MPH: 5.5 seconds
The 397cc engine and smooth five-speed transmission provides brisk acceleration off the line all the way up to highway speeds. It can hit 30 mph in just over 2 seconds.
Top Speed: 65+ MPH
While not built for high speed cruising, the 400EX tops out at over 65 mph in stock form. This is more than enough for any legal trail riding, motocross track, or wide open riding area.
Overall, the 400EX focuses more on quick 0-60 mph acceleration for activities like motocross or desert riding. But it still packs enough top end punch for high speed trail riding and fun.
2007 Honda 400EX Buying Guide: What to Look For
If you’re shopping for a used 2007 400EX, keep an eye out for:
- Service history: Look for records showing frequent oil changes, valve adjustments, and air filter maintenance. This indicates a well cared for machine.
- Overall condition: Check for damage, cracked plastics, leaking fluids, corroded components, or excessive dirt and grime buildup indicating neglect.
- Tire tread and wheel bearings: Make sure there is adequate tire tread remaining and check that the wheels spin freely without binding.
- Engine compression: Do a cold start and test ride to ensure strong, even compression and throttle response across the RPM range.
- Clutch and transmission: Listen for gear whine or clutch slipping under hard acceleration. Smooth shifts indicate a good transmission.
- Suspension and brakes: Ensure front and rear suspension feels compliant without leaks. Test brake power and make sure they don’t feel soft or spongy.
- Frame and swingarm: Look for cracks, bends, or damage that may indicate a crash or abuse.
If everything checks out, chances are you’ve found a good, clean 2007 400EX that will provide years of fun and reliable use.
Is The 2007 Honda 400EX Still Worth Buying?
Even though it’s been out of production for over 15 years, the 2007 Honda 400EX remains one of the most coveted used sport ATVs on the market. Here’s why it’s still an excellent buy:
When maintained properly, the 397cc engine and five-speed transmission are virtually bulletproof. There’s a reason you still see so many high mileage 400EX models still going strong. Honda quality shines through.
With around 30 horsepower on tap, snappy acceleration, and a 65+ mph top speed, performance is still very competitive with most newer 400cc class quads. It’s no slouch.
Nimble steering, precise cornering, and plush long travel suspension make the 400EX a joy to ride both on motocross tracks and winding trails. It handles like a sport quad should.
The 400EX gives you a high-performance sport ATV for reasonable used prices compared to buying a new model. Dollar for dollar it’s hard to beat.
Huge aftermarket means you can customize it or improve any aspect of performance. Finding parts is easy.
Yes, the lack of features like fuel injection and push button 4WD dating the 400EX by today’s standards. But if you value reliability, performance, and handling over flashy features, the 2007 400EX is still one of the best used sport quads money can buy.
2007 Honda 400EX Review | Conclusion
The 2007 Honda 400EX left a lasting legacy as one of the most popular high-performance sport ATVs of its era. This classic quad still delivers an intoxicating mix of strong acceleration, light nimble handling, plush suspension, and Honda’s legendary reliability.
While the carbureted 397cc engine lacks some refinement and the design is dated next to modern 450 class quads, the bulletproof powerplant and proven five speed transmission stand the test of time. Just change the oil regularly and keep up with basic maintenance.