KTM 79130018000 Engine Motor Bottom End Top

( Manufacturer Part Number: 79130018000 ), ( Part Type: Engine Motor ), ( Color: Black ), ( Country Of Origin: Austria )

Review KTM Oem Engine Motor Bottom End Top Mc Fc fits 350SXF SXF 350 2019–2023

The **KTM 79130018000 2021 350SX-F Engine Motor Bottom End (19-23 FC SXF 350)** is a high-performance, precision-engineered powerplant designed exclusively for KTM s 350cc single-cylinder, fuel-injected dirt bike lineup, specifically tailored for the **2019 through 2023 Factory Cross (FC) SXF 350** models. This bottom-end assembly represents the heart of the bike s dynamic performance, combining cutting-edge engineering with rugged durability to deliver explosive power, seamless throttle response, and unmatched reliability in the most demanding off-road conditions. Built to KTM s exacting standards, this engine features a **forged crankshaft** with precision-balanced counterweights, ensuring minimal vibration and optimal power delivery across the entire RPM range. The **closed-deck aluminum cylinder** is precision-machined to exacting tolerances, paired with a **high-performance piston** featuring a unique crown design for improved combustion efficiency and reduced friction, while the **forged connecting rod** maintains structural integrity under extreme stress. The **oil pump** is integrated into the crankcase, ensuring consistent lubrication even under heavy loads, while the **stainless steel timing chain** and **silent chain tensioner** eliminate the need for frequent adjustments, contributing to the engine s long-term reliability. Designed for easy installation, this bottom-end kit includes all critical components such as the **crankshaft, main bearings, connecting rod, piston, rings, and gaskets** pre-selected for optimal performance and compatibility with the 2019-2023 FC SXF 350 s fuel injection system. Whether used for track days, enduro racing, or aggressive trail riding, this engine bottom end embodies KTM s commitment to innovation, ensuring that riders experience the full potential of their bike s power with every twist of the throttle.

### **Pros and Cons of Buying a KTM 79130018000 2021 350SXF Engine (Bottom End, Top End, 19-23 FC SXF 350)**

#### **Pros**

1. **High Performance and Reliability**

The 350SXF engine is a well-regarded powerplant known for its strong performance in the 350cc class. It features a lightweight aluminum crankcase, a high-revving design, and efficient cylinder head cooling, which contribute to its competitive power output. The 2021 model incorporates refinements from previous years, including improved throttle response and better fuel efficiency.

2. **Compatibility with Aftermarket Upgrades**

KTM s 350SXF engine is widely supported by aftermarket parts, including high-performance air filters, exhaust systems, and carburetion upgrades. This makes it easier to fine-tune for racing or track use. Common modifications include swapping to a Keihin carburetor, upgrading the exhaust, or installing a high-flow air filter for better airflow.

3. **Durability and Longevity**

KTM engines are built with high-quality materials and precision machining, which contributes to their durability. The bottom end (crankshaft, bearings, and connecting rods) and top end (pistons, rings, and cylinder) are designed to withstand high RPMs and stress, especially when properly maintained. Many owners report that these engines last well beyond 100 hours with regular servicing.

4. **Lightweight and Agile**

The 350SXF is one of the lightest bikes in its class, thanks to its aluminum frame and engine components. This makes it highly maneuverable, especially in tight trails or motocross tracks, where agility is crucial.

5. **Strong Community and Support**

KTM has a large and active owner community, with forums, repair guides, and parts readily available. This means troubleshooting issues or finding replacement parts is often straightforward. Additionally, KTM dealerships and independent mechanics are familiar with these engines, making repairs and maintenance more accessible.

6. **Fuel Injection (FI) Advantages**

The 2021 350SXF features fuel injection, which improves throttle response, fuel efficiency, and emissions compliance compared to carbureted models. This makes it more reliable in varying conditions and reduces the risk of running lean or flooding the engine.

7. **Resale Value**

KTM bikes, particularly well-maintained 350SXF models, hold their value reasonably well in the used market. If you plan to sell it later, a properly cared-for engine will attract buyers looking for a reliable powerplant.

---

#### **Cons**

1. **High Maintenance Requirements**

- **Oil changes** (every 5-8 hours or as recommended).

- **Spark plug replacements** (every 10-15 hours).

- **Air filter cleaning/replacement** (every 10-20 hours).

- **Valvetrain adjustments** (every 20-30 hours).

Neglecting maintenance can lead to premature wear, especially in the bottom end (bearings, crankshaft) or top end (pistons, rings).

2. **Sensitivity to Riding Style**

The 350SXF is a high-revving engine that rewards aggressive riding but can suffer if ridden too conservatively. Under-revving or abrupt throttle inputs can cause excessive wear on the clutch, transmission, and engine components. Riders who prefer smooth, low-RPM riding may find the bike less forgiving.

3. **Cost of Repairs and Replacement Parts**

- A **bottom end rebuild** (crankshaft, bearings, connecting rods) can cost $800 $1,500 depending on labor and parts.

- **Top end rebuilds** (pistons, rings, cylinder) are also costly, often ranging from $600 $1,200.

- Aftermarket parts (e.g., high-performance pistons, custom crankshafts) can further increase costs.

4. **Fuel Injection Reliability**

While fuel injection is an advantage, it can be finicky. Issues like clogged injectors, sensor failures, or ECU glitches may require diagnostic work. Some riders report occasional stalling or rough idling, which can be frustrating if not properly addressed.

5. **Limited Stocking by Some Dealers**

Depending on your location, finding OEM parts (e.g., KTM-specific gaskets, seals, or sensors) may require ordering from the manufacturer or a specialty shop. This can delay repairs if you re not near a well-stocked dealer.

6. **Weight Distribution Challenges**

While lightweight, the 350SXF s engine placement can make it slightly front-heavy, which may affect handling on rough terrain. Some riders opt for aftermarket suspension upgrades to compensate.

7. **Learning Curve for New Riders**

The bike s high power-to-weight ratio and aggressive nature can be intimidating for beginners. New riders may struggle with throttle control, braking, and cornering until they become comfortable with the bike s capabilities.

---

### **Conclusion**

The **KTM 79130018000 2021 350SXF engine** is a fantastic choice for riders who prioritize performance, agility, and aftermarket potential. It delivers strong power, is well-supported by a large community, and benefits from fuel injection for reliability. However, it requires **diligent maintenance**, **responsible riding**, and a **budget for potential repairs** to avoid costly issues down the line.

If you re an experienced rider who enjoys high-performance bikes and is willing to invest time in upkeep, this engine is an excellent investment. For beginners or casual riders, the maintenance demands and cost of repairs may outweigh the benefits unless you re prepared to commit to proper care.

---

### **Recommendation**

- You re an experienced rider or willing to learn proper maintenance.

- You plan to modify the bike for racing or track use.

- You have access to a mechanic or are comfortable performing basic servicing.

- You re okay with the potential for higher repair costs if issues arise.

- You re a beginner who hasn t ridden high-performance bikes before.

- You expect to ride the bike sporadically without regular maintenance.

- You re on a tight budget and cannot afford unexpected repair costs.

- You prefer a more forgiving, low-maintenance engine.

**Final Verdict:** The 2021 350SXF engine is a **top-tier choice for competitive riders** who value performance and are prepared for its demands. With proper care, it will provide years of reliable power, but it s not the best fit for casual or inexperienced riders. If you re committed to maintaining it, it s a fantastic engine to own.

Details:

Item was removed from a lightly used strong running bike. Might have marks from storage removal. Please reach out before purchasing 2022 Ktm 350SXF oem complete engine with 19hrs. Shows signs of normal wear with no issues.

part #: 79130018000 prices

• $986.51-$998.12

specifications cyclevintagee:

• for models: 350sxf, Sxf, 350
• for makes: Ktm
• for years: 2019-2023
• mpn: 79130018000
• part type: Engine Motor
• color: Black
• country of origin: Austria

seller cyclevintagee:

• # reviews: 1557
• rating: 100.0%
• city: Joppa, Maryland

offer cyclevintagee:

• started: March 11, 2026
• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0

shipping cyclevintagee:

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

returns cyclevintagee:

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

payments cyclevintagee:

• other
• credit card: Discover
• wallet: Google-pay

general cyclevintagee:

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

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