HONDA BJR-5491 Cdi Box Alarm Control Unit Bjr 38710-HC4-003
fits model: Trx300, Fourtrax. make: Honda. year: 1994.
( Manufacturer Part Number: BJR-5491 ), ( Part Type: Control Box Alarm Unit ), ( Machine Type: Atv ), ( Oe/oem Part Number: 38710-hc4-003 ), ( Color: Black )
Review HONDA Bjr#5491 Cdi Alarm Box Control Unit #38710-hc4-003 fits FOURTRAX TRX300 1994
The **1994 Honda TRX300 FourTrac CDI (BJR5491)** is a legendary off-road machine, renowned for its rugged reliability, nimble handling, and timeless design that defined the compact ATV market of the early '90s. At the heart of its functionality lies the **38710-HC4-003 Alarm Box Control Unit**, a critical component that ensures the vehicle s electrical system operates with precision and safety. This control unit is a specialized module designed to manage the TRX300 s electrical circuits, particularly the alarm system, which includes the horn, warning lights, and other critical indicators. Crafted with Honda s signature engineering precision, this unit is built to withstand the harsh conditions of off-road adventures, featuring durable wiring harness connections and robust internal circuitry that resists vibration, moisture, and temperature fluctuations. The **38710-HC4-003** is not merely a replacement part but a vital link in the TRX300 s electrical network, ensuring that the rider receives immediate feedback through audible and visual alerts whether it s the sharp blare of the horn signaling an obstacle or the illumination of the turn signals and brake lights for visibility in low-light conditions. For owners seeking to restore their classic TRX300 to full operational condition or those upgrading their rig with aftermarket modifications, this control unit is an essential component that guarantees seamless integration with the vehicle s existing wiring and systems. Its compatibility with the **CDI ignition system** further enhances the TRX300 s performance, offering a reliable and efficient electrical interface that complements the engine s smooth power delivery. Whether used in a restored showpiece or a heavily modified trail beast, the **38710-HC4-003 Alarm Box Control Unit** ensures that every ride is not only powerful but also safe and responsive, embodying the spirit of Honda s enduring legacy in off-road engineering.
### **Pros and Cons of Buying a 1994 Honda TRX300 FourTrax CDI with Alarm Box Control Unit (Part #38710-HC4-003)**
#### **Pros**
1. **Classic Reliability** Honda s TRX300 (BJR5491) is known for its durable engine, straightforward mechanics, and strong resale value compared to other off-road bikes of its era. Many parts are still readily available, making repairs easier.
2. **Off-Road Capability** The TRX300 was designed for rugged use, with a sturdy frame, long-travel suspension, and a powerful air-cooled single-cylinder engine (286cc). It handles rough terrain well, making it a solid choice for trail riding or light overlanding.
3. **Simplicity and Ease of Maintenance** Unlike modern bikes with complex electronics, the TRX300 s mechanical systems are relatively simple to work on. Basic repairs (oil changes, chain adjustments, carburetor tuning) can be done with minimal tools.
4. **Fuel Efficiency** The air-cooled, carbureted engine is not as thirsty as modern fuel-injected bikes, making it cost-effective for occasional use.
5. **Vintage Appeal** If you enjoy classic bikes, the TRX300 has a nostalgic charm. Its retro styling and mechanical simplicity attract enthusiasts who appreciate older designs.
6. **Alarm Box Control Unit (Part #38710-HC4-003)** This specific part is part of Honda s early electronic ignition system (CDI Capacitor Discharge Ignition). While not essential for basic operation, it helps with ignition timing and reliability. If the bike has electrical issues, this unit may be a good investment to restore proper function.
7. **Lower Cost of Ownership** Compared to modern ATVs or newer bikes, maintenance and replacement parts for the TRX300 are generally affordable.
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#### **Cons**
1. **Age and Wear** A 1994 model is over 30 years old, meaning the bike may have significant wear on the engine, transmission, suspension, and frame. Rust, worn bearings, and degraded rubber components (hoses, belts, seals) are common issues.
2. **Electrical Reliability** The CDI system, while functional, can be finicky. The alarm box control unit (part #38710-HC4-003) may fail over time, requiring replacement. Older wiring harnesses can also degrade, leading to intermittent electrical problems.
3. **Limited Modern Features** Unlike newer ATVs, the TRX300 lacks features such as disc brakes (it uses drum brakes), modern suspension tuning, and advanced safety systems. Riding comfort and handling may not meet contemporary standards.
4. **Fuel and Emissions** The bike uses leaded fuel (if still available) or unleaded fuel, which can cause carburetor fouling. Modern fuel additives may not be compatible, and emissions standards are outdated.
5. **Parts Availability** While many parts are still available, some specialized components (e.g., specific seals, gaskets, or electrical connectors) may be harder to find than on newer bikes. Honda no longer supports the TRX300 line, so official service is limited.
6. **Riding Experience** The ergonomics (seat, handlebars, footpegs) are less adjustable than modern bikes, and the lack of suspension travel compared to today s standards means a rougher ride on extreme terrain.
7. **Resale Value** While better than many vintage bikes, the TRX300 s resale value is not high. If you plan to sell later, you may not recover much of your investment.
8. **Potential Hidden Damage** Without a thorough inspection, issues like frame cracks, seized bearings, or internal engine wear may not be immediately obvious. A 30-year-old bike could have structural weaknesses.
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### **Conclusion**
Buying a **1994 Honda TRX300 FourTrax CDI with the alarm box control unit (part #38710-HC4-003)** can be a rewarding experience if you value **reliability, simplicity, and off-road capability** in a classic bike. It is an excellent choice for **enthusiasts who enjoy mechanical work, vintage aesthetics, and rugged trail riding** especially if you plan to restore or maintain it yourself.
However, if you prioritize **modern comfort, safety features, ease of use, or plan to ride frequently**, a newer ATV or a well-maintained modern bike may be a better investment. The TRX300 is not ideal for daily use or extreme off-roading but excels as a **project bike, collector s item, or a secondary vehicle for occasional adventures**.
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### **Recommendation**
- **Buy if:**- You are an experienced rider comfortable with mechanical repairs.
- You enjoy the vintage appeal and simplicity of older bikes.
- You plan to inspect the bike thoroughly (or have a mechanic do so) before purchasing.
- You are willing to invest time in maintenance and restoration.
- You need a reliable, no-frills off-road bike for light use.
- **Avoid if:**- You expect modern convenience, safety, or performance.
- You are not prepared for potential hidden mechanical issues.
- You want a bike for frequent use without significant upkeep.
- You prefer newer models with better parts availability and warranties.
**Final Suggestion:**If you decide to purchase this bike, **prioritize a full inspection** especially of the engine, transmission, suspension, and electrical system. Replacing the alarm box control unit (part #38710-HC4-003) is a good step if the bike has ignition issues, but ensure the rest of the electrical system is sound. Consider testing the bike on a trail before finalizing the purchase to confirm its condition. If possible, buy from a seller who offers a warranty or return policy for added peace of mind.
Details:
1994 Honda Trx300 Fourtrax 4 CDI alarm Box Control Unit #38710-HC4-003 tested passed BJR#5491.
part #: bjr5491 prices
- $10.31-$45.99
specifications electricacompone:
- for models: Trx300, Fourtrax
- for makes: Honda
- for years: 1994
- mpn: Bjr-5491
- part type: Control Box Alarm Unit
- machine type: Atv
- oe/oem part number: 38710-hc4-003
- color: Black
seller electricacompone:
- # reviews: 3136
- city: Kunkletown, Pennsylvania
- rating: 99.6%
offer electricacompone:
- started: May 5, 2026
- options: Ship-to-home
- quantity: 1
- availability: In Stock
- sold: 0
payments electricacompone:
- credit card: Discover
- other
- wallet: Apple-pay
returns electricacompone:
- policy: Returns Accepted
- time: 30 Days
- paid by: Seller
shipping electricacompone:
- transit: 3-7 Days
- class: Standard
- carrier: USPS
- cost: $0.00
- service: USPS Ground Advantage
- type: Fixed
general electricacompone:
- ATV, Side-by-Side UTV Parts Accessories > Electrical Ignition Components > Other Electrical Ignition Components
- condition: Used
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