YAMAHA 5N0-12171-11-00 Camshaft

( Manufacturer Part Number: 5N0-12171-11-00 ), ( Part Type: Camshaft ), ( Compatible Model: Xt125, Xt125j ), ( Placement On Vehicle: Front )

Review YAMAHA Camshaft fits XT125J XT 125 1982

The **Yamaha 5N0-12171-11-00 Camshaft** is a meticulously engineered component designed exclusively for the **1982 Yamaha XT125J**, a legendary off-road adventure bike renowned for its durability, reliability, and timeless appeal. This high-performance camshaft is a direct replacement part, crafted to restore or enhance the original engine s power delivery, throttle response, and overall efficiency. Engineered from precision-machined steel, it features a robust design optimized for the XT125J s single-cylinder, air-cooled engine, ensuring smooth operation under the demanding conditions of trail riding, long-distance touring, or heavy-duty off-road use. The camshaft s contour and lift profile are finely tuned to balance a mix of low-end torque and mid-range punch, allowing riders to tackle steep climbs, rough terrain, and sustained high-speed cruising with confidence. Whether you're restoring a classic XT125J to its factory glory or upgrading an existing engine for improved performance, this camshaft delivers the precision and performance expected from Yamaha s legendary off-road heritage. Built to withstand the rigors of frequent use and exposure to dust, dirt, and varying temperatures, it is a critical component for maintaining the engine s longevity while unlocking its full potential. Perfect for both restoration projects and performance enthusiasts, this camshaft is a testament to Yamaha s commitment to craftsmanship and reliability in the world of adventure motorcycles.

### **Pros and Cons of buying a Yamaha 5N0-12171-11-00 (1982 XT125J Camshaft)**

1. **Authentic Restoration** If you own or plan to restore a 1982 Yamaha XT125J, this is the genuine OEM camshaft, ensuring proper fitment and performance without aftermarket modifications.

2. **Reliability** Yamaha s early dual-sport models were known for durability, and using original parts helps maintain the bike s integrity and longevity.

3. **Performance Match** The stock camshaft is tuned for the XT125J s engine, providing a balanced powerband that suits off-road and on-road riding.

4. **Ease of Installation** Being an OEM part, it should fit without requiring extensive modifications, assuming the rest of the engine is in good condition.

5. **Avoiding Counterfeit Parts** Purchasing directly from a reputable source (or an authorized dealer) ensures you re getting the real part, not a knockoff that could damage your engine.

1. **Age and Wear** The part is over 40 years old, meaning it may have been sitting in storage for decades. Check for signs of wear, corrosion, or degradation before purchasing.

2. **Limited Availability** Finding a genuine Yamaha OEM part for a vintage model can be difficult, especially if the seller is not a trusted source. You may need to search through auctions, specialty shops, or restoration forums.

3. **No Performance Upgrades** If you re looking for more power, this is a stock camshaft. Aftermarket options (like a slightly more aggressive cam) may offer better throttle response or top-end power.

4. **Potential for Mismatched Components** If other parts of the engine (valvetrain, pistons, etc.) are worn, replacing just the camshaft may not fully restore performance. A full rebuild might be necessary.

5. **Cost vs. Value** Depending on the seller s price, this part may not be worth the investment if you re not committed to a full restoration. Newer aftermarket alternatives (if available) could be more cost-effective.

---

Buying the **Yamaha 5N0-12171-11-00 camshaft for a 1982 XT125J** is ideal if you re restoring the bike to stock condition or need an exact replacement for authenticity. However, if you re not fully committed to a full restoration or seeking performance gains, the cost and availability challenges may outweigh the benefits.

If you proceed, **verify the part s condition, source it from a trusted seller, and consider whether a full engine rebuild is necessary** alongside the camshaft replacement. If you re open to alternatives, research aftermarket camshafts (if available for this model) that could offer better performance without the same limitations.

- **If restoring to stock spec:** Proceed with the OEM camshaft, especially if you have other original components.

- **If seeking performance:** Look into aftermarket camshaft options (if compatible) or consider a full engine rebuild for better reliability.

- **If unsure about condition:** Inspect the part thoroughly or have a mechanic verify its integrity before purchasing.

- **Alternative approach:** If the part is too expensive or hard to find, prioritize other critical restoration tasks first (e.g., engine rebuild, suspension, drivetrain) before investing in a single component.

Ultimately, the decision depends on your goals whether they re purely historical accuracy, performance, or a balance of both.

Details:

Normal wear to finish. Some light surface blemishes but nothing gnarly. I will surely do the same. Camshaft pulled from a 1982 XT125J.

I would not sell a part use myself. If this listing has free shipping it is for the LOWER 48 STATES ONLY. Lobes worn some but lots of life left and still well within service specs. Parts are sold as is to the best of my knowledge.

Great part!what you see is what get. Great looking part.

part #: 5n0121711100 prices

• $48.61-$99.95

specifications intakefuelmotorcycle:

• for models: Xt125j, Xt, 125
• for makes: Yamaha
• for years: 1982
• mpn: 5n0-12171-11-00
• part type: Camshaft
• compatible model: Xt125, Xt125j
• placement on vehicle: Front

shipping intakefuelmotorcycle:

• carrier: USPS
• cost: $13.05
• transit: 5-8 Days
• service: USPS Ground Advantage
• class: Standard
• type: Calculated

returns intakefuelmotorcycle:

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

seller intakefuelmotorcycle:

• city: Beryl, Utah
• rating: 100.0%
• # reviews: 1189

offer intakefuelmotorcycle:

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

general intakefuelmotorcycle:

• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
• condition: Used

payments intakefuelmotorcycle:

• wallet: Paypal
• other
• credit card: Discover