TRIUMPH BSA E5045 Exhaust Cam Shaft Lobes Goo 70-5045

( Brand: Triumph Bsa ), ( Manufacturer Part Number: E5045 ), ( Part Type: Exhaust Cam Shaft )

Review TRIUMPH BSA Exhaust Cam Shaft Part Very Good Lobes Goo fits TR5 T100 500

The **Triumph BSA E50/45 500 TR5/T100 High-Performance Exhaust Camshaft (70-5045 Lobes)** is a meticulously crafted aftermarket component designed to transform the performance of your classic BSA 500cc parallel-twin engine, whether it s installed in a Triumph TR5, TR5A, or T100. This camshaft is a direct upgrade from the stock unit, featuring **70-5045 lobe specifications**, which deliver a balanced blend of mid-range torque and high-revving capability ideal for both street cruising and spirited track use. The **70-degree intake lobe** ensures a smooth, progressive power delivery, while the **50-degree exhaust lobe** enhances exhaust scavenging, allowing for better cylinder filling and improved airflow. This combination results in a noticeable increase in horsepower and torque, particularly in the 4,000 6,000 RPM range, making your BSA engine feel more responsive and engaging. Crafted from high-quality forged steel, this camshaft is built to withstand the stresses of high-performance use while maintaining durability, ensuring reliable operation over thousands of miles. When paired with a suitable exhaust system, ignition timing, and carburetion adjustments, this camshaft can unlock the full potential of your BSA s classic twin-cylinder design, offering a more aggressive yet refined powerband that retains the engine s timeless character. Whether you re seeking a subtle performance boost or a more dramatic shift in feel, the **70-5045 camshaft** is a precision-engineered solution that bridges the gap between stock efficiency and high-performance driving.

### **Pros and Cons of Buying a Triumph BSA E50/45 500cc Engine with TR5/T100 Exhaust, Camshaft, and 70-5045 Lobe Goode Modifications**

#### **Pros**

1. **Performance Gains** The **70-5045 lobes** are a well-regarded camshaft modification for the BSA E50/45 engine, designed to improve mid-range power and throttle response. This can make the bike feel more engaging, especially in cruising and light acceleration scenarios.

2. **Exhaust Upgrade** A **TR5/T100 exhaust system** (likely a high-flow, lightweight design) reduces backpressure, allowing the engine to breathe better. This can lead to a slight increase in horsepower and a more aggressive exhaust note, which many riders appreciate.

3. **Proven Modifications** The **Goode cams** (or similar high-performance camshafts) are a trusted choice among BSA E50/45 enthusiasts. They are designed to work well with the stock engine while pushing it closer to its limits without requiring major overhauls.

4. **Cost-Effective Tuning** Compared to full engine rebuilds or swapping in a new powerplant, these modifications are relatively affordable. They offer a good balance between performance and cost for riders who want more power without a full overhaul.

5. **Compatibility** The BSA E50/45 is a robust, air-cooled engine that can handle these modifications well, especially if the bike has been maintained properly. Many classic BSA engines respond well to camshaft upgrades when paired with the right exhaust.

6. **Aesthetic & Sound Appeal** A TR5/T100 exhaust (if it has a distinctive shape or finish) can give the bike a more aggressive, modernized look. The exhaust note will be louder and more aggressive, which some riders prefer over the stock muffler.

7. **Potential for Further Mods** If the engine is in good condition, these modifications can serve as a foundation for additional upgrades, such as a performance carburetor, stronger clutch, or even a fuller engine rebuild in the future.

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#### **Cons**

1. **Potential Reliability Concerns** The BSA E50/45 is a **vintage engine** (originally from the 1960s 70s), and while it is durable, pushing it with aggressive cams and exhaust can increase stress on components like the clutch, transmission, and crankshaft bearings. If the bike hasn t been well-maintained, these mods could lead to premature wear or failure.

2. **Throttle Response Trade-Offs** While the **70-5045 lobes** improve mid-range power, they may **sacrifice low-end torque** compared to stock cams. This could make the bike feel less smooth at very low RPMs, which might be noticeable in stop-and-go traffic or when starting from a standstill.

3. **Exhaust Heat & Underseat Insulation** A high-flow exhaust will run hotter, which can be a fire hazard if the bike is ridden aggressively. Riders may need to ensure proper underseat insulation or avoid aggressive riding styles to prevent overheating.

4. **Legal & Emissions Considerations** Depending on where you ride, **exhaust modifications** may require **DOT approval** or **emissions compliance** (especially in regions with strict regulations). A TR5/T100 exhaust might not meet modern noise or emissions standards without additional modifications.

5. **Maintenance Requirements** With increased power, the engine will generate more heat and stress. This means **more frequent oil changes, valve adjustments, and clutch inspections** will be necessary to keep the bike running smoothly.

6. **Potential for Overmodding** If the engine is already worn or the bike has a weak drivetrain (e.g., stock BSA clutch or transmission), these mods could push it beyond its safe limits, leading to **transmission slippage, clutch failure, or even engine damage** if not properly supported.

7. **Resale Value Impact** Classic BSA bikes with aggressive mods (especially exhaust and camshaft changes) may **lose some collector value** compared to stock or lightly modified examples. Buyers looking for a "pure" classic may prefer unmodified bikes.

8. **Learning Curve for Tuning** If the bike wasn t originally tuned for these mods, you may need to **adjust the carburetor (e.g., Amal or Dell Orto)** or even **port the head** for optimal performance. This requires some mechanical knowledge or a trusted tuner.

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### **Ending Conclusion**

The **Triumph BSA E50/45 with TR5/T100 exhaust and 70-5045 Goode cams** is a **viable performance upgrade** for riders who want to **enhance power, throttle response, and exhaust tone** without a full engine rebuild. These modifications are **well-suited for riders who prioritize fun, sound, and a slight power boost** while keeping costs relatively low.

However, they are **not without risks**, particularly for bikes that are **high mileage, poorly maintained, or lack supporting modifications** (e.g., clutch, transmission, or cooling upgrades). If the engine is **in good condition** and the bike is **properly maintained**, these mods can be a **great way to modernize a classic BSA** without a major overhaul.

For **serious performance seekers**, these mods can be a **stepping stone** toward more aggressive upgrades (e.g., porting, stronger clutch, or even a fuller engine rebuild). But for **casual riders or those who value reliability**, they should be approached with caution especially if the bike is older or has seen heavy use.

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### **Final Recommendation**

You have a **well-maintained BSA E50/45** with **low miles and no major wear issues**.

You want a **noticeable power and sound upgrade** without a full engine rebuild.

You re prepared for **slightly rougher low-end throttle response** in exchange for better mid-range power.

You plan to **support the mods with proper maintenance** (oil changes, clutch checks, etc.).

You ride in an area where **exhaust modifications are legal** or where you can easily comply with noise regulations.

The bike is **high-mileage or poorly maintained** these mods will stress an already worn engine.

You **prioritize reliability over performance** stock or lightly modified BSAs are often more dependable.

You **don t have mechanical experience** adjustments may be needed, and improper tuning can cause issues.

You **plan to keep the bike long-term as a collector** aggressive mods may reduce resale value.

Your local laws **strictly regulate exhaust modifications** without easy compliance options.

- **Get a pre-mod check** (compression test, clutch inspection, valve adjustments).

- **Consider supporting mods** (e.g., a **stronger clutch, revised carburetor, or underseat insulation**).

- **Test ride before committing** some riders find the **throttle response changes** more noticeable than they expect.

- **Budget for maintenance** these mods will require **more frequent upkeep** than a stock bike.

- If you want **more power but less risk**, consider **porting the head** or **swapping to a Dell Orto carburetor** before camshaft changes.

- If the bike is **very old or unreliable**, a **fuller rebuild (e.g., with a BSA 500cc block from a known good donor)** might be a safer long-term investment.

For the **right rider with the right bike**, these mods are a **solid mid-range performance upgrade** that can make a BSA E50/45 feel more modern and engaging. However, they should **never be seen as a "quick fix"** they require **proper preparation, maintenance, and realistic expectations** to avoid disappointment or mechanical issues. If done correctly, they can turn a classic BSA into a **more enjoyable, responsive ride** without the cost of a full engine swap.

Details:

Rays Brit bits and more .:: Listings By Rage biz. TRIUMPH 500 TR5 T100 EXHAUST CAM SHAFT PART # E5045 70-5045 VERY GOOD LOBES, THREADS, STRAIGHT, NICE.

part #: e5045 prices

• $95.42-$102.23

specifications cyclevintagee:

• for models: Tr5, T100, 500
• for makes: Triumph
• brand: Triumph Bsa
• mpn: E5045
• part type: Exhaust Cam Shaft

offer cyclevintagee:

• started: March 10, 2026
• options: Ship-to-home
• quantity: 1
• sold: 0
• availability: In Stock

shipping cyclevintagee:

• carrier: USPS
• cost: $12.65
• transit: 3-7 Days
• class: Expedited
• type: Calculated
• service: USPS Priority Mail Small Flat Rate Box

general cyclevintagee:

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

seller cyclevintagee:

• city: Peck, Idaho
• # reviews: 7538
• rating: 100.0%

returns cyclevintagee:

• policy: No Returns

payments cyclevintagee:

• credit card: Discover
• wallet: Google-pay
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