HONDA 31HM3640 Owners Manual 31HM3630

( Manufacturer Part Number: 31HM3640 ), ( Type: 1 Vintage Part Small ), ( Country Of Origin: Japan )

Review HONDA Owners Manual Pn fits FOURTRAX 300EX TRX 1996

The **Honda TRX 300EX FourTrax (Model 31HM3640, 1996)** and its predecessor, the **TRX 300EX (Model 31HM3630)**, represent Honda s legendary lineup of compact, high-performance off-road ATVs designed for both rugged adventure and precise handling. Engineered for versatility, these models feature Honda s reliable **304cc single-cylinder liquid-cooled engine**, delivering a balanced blend of torque and efficiency that makes them ideal for everything from trail riding and light utility work to competitive off-road racing. The **31HM3640 (1996)** refined the already impressive **31HM3630** with subtle yet meaningful upgrades, including enhanced suspension tuning, improved braking systems, and a more durable frame to better withstand the demands of rough terrain. Both models share a **front-wheel-drive (FWD) layout**, a hallmark of Honda s FourTrax lineup, which provides exceptional traction and stability on loose surfaces like sand, mud, and rocky trails while maintaining the agility of a smaller ATV.

Under the hood, the **304cc engine** is a marvel of simplicity and durability, producing approximately **19 horsepower** and **20 lb-ft of torque**, enough to propel the TRX 300EX through challenging off-road conditions with ease. The **automatic transmission** with a **3-speed range** (low, neutral, and high) ensures smooth power delivery, while the **permanent four-wheel-drive (4WD) system** though not as aggressive as later models provides consistent power distribution for enhanced control. The **fuel-injected engine** (on the 31HM3640) improves throttle response and reduces emissions compared to the **carbureted version** found in the 31HM3630, making it more reliable for long rides. Both models are equipped with a **5-speed manual transmission** in the 31HM3630 and an **automatic with a manual override** in the 31HM3640, catering to riders who prefer either effortless cruising or more direct control over gear selection.

The **chassis and suspension** of the TRX 300EX are built for durability and adaptability. The **double-cradle frame** provides a sturdy foundation, while the **hydraulic front suspension** and **rear swingarm with adjustable shock absorbers** absorb impacts from rough terrain, ensuring a smoother ride. The **independent front suspension (IFS)** allows for better articulation over obstacles, and the **adjustable preload on the rear shocks** lets riders fine-tune the suspension to their weight and riding style. The **wheels and tires** typically **16-inch front and 18-inch rear** are designed to grip a variety of surfaces, with **aggressive tread patterns** for maximum traction in mud, sand, and rocky conditions. The **braking system** features a **front disc brake** (on the 31HM3640) paired with a **rear drum brake**, providing reliable stopping power even when laden with gear or cargo.

For riders who demand precision and control, the **TRX 300EX** offers a **tilt-and-telemetry steering system**, allowing for sharp turns and easy maneuverability in tight spaces. The **ergonomic seating position** and **adjustable foot pegs** ensure comfort during long rides, while the **durable steel frame** and **galvanized undercarriage** protect against rust and wear from exposure to the elements. The **utility-focused design** includes a **roof rack** (on some models) for carrying additional gear, and the **spacious storage compartments** under the seat provide practical space for tools, spare parts, or camping essentials. The **1996 model (31HM3640)** also introduced slight refinements to the **instrumentation**, including a more readable **speedometer and fuel gauge**, as well as improved **lighting** for better visibility during nighttime rides.

Whether used for **recreational trail riding, light farming tasks, or competitive off-road racing**, the **Honda TRX 300EX (31HM3630/31HM3640)** remains a timeless choice for riders seeking a **compact, fuel-efficient, and dependable** ATV. Its **proven Honda reliability**, **versatile performance**, and **durable construction** make it a favorite among both casual enthusiasts and seasoned off-roaders. With proper maintenance such as regular **oil changes, chain adjustments, and suspension tuning** these models can easily last **decades**, offering countless hours of adventure on and off the trail. The **owners manual** for these units is an essential companion, detailing everything from **engine specifications and maintenance schedules** to **operational guidelines and safety precautions**, ensuring that riders can maximize performance while keeping their TRX 300EX running smoothly for years to come.

### **Pros and Cons of Buying a 1996 Honda TRX 300EX FourTrax (Model 31HM3640/31HM3630)**

#### **Pros**

1. **Reliability and Durability** Honda s reputation for long-lasting engines and transmissions holds true for the TRX 300EX. The 300cc single-cylinder engine is simple, robust, and built to withstand rough terrain. Many units still run strong after decades with proper maintenance.

2. **Lightweight and Maneuverable** At around 200 220 lbs (90 100 kg), the TRX 300EX is easy to handle, making it ideal for off-road trails, tight spaces, and beginners. Its small size also makes it easier to transport.

3. **Fuel Efficiency** The 300EX gets approximately **60 80 miles per gallon** on trails, making it cost-effective for recreational use compared to larger ATVs.

4. **Affordability** Used models from the mid-'90s are relatively inexpensive, often ranging from **$1,500 to $3,500**, depending on condition. Parts are also widely available and cheap.

5. **Simplicity and Low Maintenance** With fewer moving parts than larger ATVs, repairs are straightforward. Basic maintenance (oil changes, chain adjustments, spark plug replacements) can be done at home.

6. **Versatility** While not as powerful as modern ATVs, the TRX 300EX is capable of handling light trails, snow (with optional snow tires), and even some rocky terrain. Its low ground clearance helps it navigate rough patches.

7. **Community and Customization** The TRX 300EX has a dedicated fanbase, with aftermarket parts (e.g., upgraded suspension, exhaust, or paint) available. Many owners modify them for better performance or aesthetics.

8. **Beginner-Friendly** Its small size and manageable power make it a good choice for new ATV riders or those looking for a secondary vehicle.

---

#### **Cons**

1. **Limited Power and Speed** The 300cc engine produces only about **15 20 horsepower**, making it slow (top speed around **40 50 mph**). This restricts its use to light trails, not heavy-duty off-roading or high-speed riding.

2. **Poor Suspension for Rough Terrain** The stock suspension is stiff and not designed for extreme jumps or deep ruts. Upgrading forks and shocks is often necessary for serious off-roading.

3. **Outdated Safety Features** Unlike modern ATVs, the TRX 300EX lacks **roll cages, advanced braking systems, or electronic stability control**. It also has a **single-speed transmission**, meaning no gear shifting for better control.

4. **Comfort Limitations** The small seat and lack of suspension travel make long rides uncomfortable, especially on rough terrain. Vibration from the engine can also be noticeable.

5. **Fuel and Emissions Concerns** Older ATVs like this do not meet modern emissions standards, so they may not be legal for use in some areas with strict environmental regulations.

6. **Resale Value** Unlike newer ATVs, the TRX 300EX does not hold value well. If you plan to upgrade later, you may not recover much from resale.

7. **Limited Storage** There is no built-in storage (unlike later models), so carrying gear requires aftermarket racks or bags.

8. **Rust and Wear Issues** Many older TRX 300EX models suffer from **rust in the frame, suspension, and undercarriage**, especially if stored outdoors. A thorough inspection is crucial before purchase.

---

### **Conclusion**

The **1996 Honda TRX 300EX FourTrax** is a **great choice for casual riders, beginners, or those seeking a lightweight, affordable ATV for light trails, snow, or farm use**. Its reliability, low cost, and ease of maintenance make it a practical option. However, it is **not suitable for serious off-road enthusiasts, high-speed riding, or heavy-duty tasks** due to its limited power and outdated design.

If you prioritize **simplicity, cost-effectiveness, and fun on easy trails**, this ATV is an excellent buy. If you need **power, comfort, or advanced off-road capabilities**, consider a newer model or a more robust ATV like a Honda TRX 500 or Yamaha Raptor.

### **Recommendation**

- **Buy if:** You want a **budget-friendly, easy-to-maintain ATV** for light trails, snow, or farm use. You re okay with its **slow speed and limited power**.

- **Avoid if:** You plan to ride **aggressive trails, jump frequently, or carry heavy loads**. You prefer **modern safety features and comfort**.

- Inspect for **rust, frame damage, and suspension wear**.

- Check the **engine for excessive oil consumption or rough idling**.

- Test the **brakes, steering, and throttle response**.

- Ensure it meets **local emissions and registration laws**.

For most casual riders, the TRX 300EX remains a **solid, no-frills ATV** that delivers good value for its price. Just manage expectations regarding performance and comfort.

Details:

1996 Honda TRX 300EX FOURTRAX Owners Manual, PN 31HM3630.

part #: 31hm3640 prices

• $49.95-$50.00

specifications cyclevintagee:

• for models: 300ex, Trx, Fourtrax
• for makes: Honda
• for years: 1996
• mpn: 31hm3640
• type: 1 Vintage Part Small
• country of origin: Japan

shipping cyclevintagee:

• type: Fixed
• cost: $0.00
• class: Standard
• service: Standard
• transit: 3-7 Days

offer cyclevintagee:

• sold: 0
• quantity: 1
• started: April 15, 2026
• options: Ship-to-home
• availability: In Stock

payments cyclevintagee:

• wallet: Paypal
• other
• credit card: Visa

general cyclevintagee:

• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories
• condition: Used

seller cyclevintagee:

• rating: 100.0%
• # reviews: 7008
• city: Columbus, Ohio

returns cyclevintagee:

• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

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