1. Antique, Vintage, Historic Motorcycle Parts For Sale
  2. sku: 22032222521084752
  3. KTM 77839005044

KTM 77839005044 Flywheel Rotor Freewheel Clutch Gear

fits model: Xc, Sx, 250, 350. make: Ktm. year: 2014–2015.

77839005044 Ktm 2014-2015 250 350 Xc-f Sx-f Flywheel Rotor And Freewheel Clutch Gear Assembly

( Manufacturer Part Number: 77839005044 ), ( Part Type: Rotor Flywheel Clutch Gear ), ( Country Of Origin: Austria )

Review KTM Xc f Sx Flywheel Rotor And Freewheel Clutch Gear Assembly fits XC SX 250 350 2014–2015

The **KTM 77839005044 OEM Flywheel Rotor Assembly** is a precision-engineered component designed exclusively for the **2014 2015 KTM 250 XC-F and 350 XC-F, as well as the 250 SX-F and 350 SX-F** off-road motorcycles. This high-performance assembly combines a **cast aluminum flywheel** with an integrated **multi-plate freewheel mechanism** and a **clutch gear**, ensuring seamless power transfer while maintaining the stock reliability and responsiveness that KTM enthusiasts expect. The flywheel rotor features a **balanced, lightweight construction**, optimized for smooth operation and reduced vibration, which is critical for the aggressive riding styles demanded by cross-country and supercross disciplines. The freewheel mechanism allows the rear wheel to spin independently of the engine when the clutch is disengaged, eliminating the need for a separate freewheel hub, while the clutch gear is precision-machined to match the exact specifications of the original equipment, guaranteeing a perfect fit with the transmission and clutch components. This assembly is built to withstand the rigors of off-road riding, including high RPMs, sudden power surges, and rough terrain impacts, making it an ideal replacement for damaged or worn-out stock units. Whether restoring a bike to factory condition or upgrading for enhanced performance, this OEM-quality part ensures compatibility, durability, and the characteristic KTM power delivery that riders rely on for both competition and recreational use.

### **Pros and Cons of Buying a 2014-2015 KTM 250/350 XC-F/SX-F (Part Number: 83900050444)**

#### **Pros:**

1. **Reliable Engine and Performance**

- The KTM 250/350 XC-F and SX-F models feature the proven **single-cylinder, air/oil-cooled engine**, known for durability and strong low-end torque.

- The **250cc engine** is lightweight and efficient, making it ideal for cross-country riding, while the **350cc** offers more power for trail and enduro use.

- The **fuel-injected system** (on later 2014 models) improves throttle response and fuel efficiency compared to carbureted predecessors.

2. **Lightweight and Agile Handling**

- KTM s **aluminum frame** keeps the bike lean, improving maneuverability on technical terrain.

- The **suspension (WP XPLORA) is adjustable**, allowing riders to fine-tune damping for different conditions.

- The **21-inch front and 18-inch rear wheels** enhance agility, though they may sacrifice some stability at high speeds.

3. **Off-Road Capabilities**

- The **long-travel suspension (190mm front, 200mm rear on SX-F; 200mm front, 210mm rear on XC-F)** is well-suited for rough trails.

- The **skid plates and reinforced undercarriage** provide protection in crashes.

- The **freewheel hub** (on XC-F) allows for easier wheel removal, useful for maintenance or recovery.

4. **Modularity and Upgrade Potential**

- KTM s **modular design** allows for easy upgrades, such as swapping wheels, suspension, or exhaust systems.

- Aftermarket support is strong, with parts available for performance tuning (e.g., clutch, chain, or engine upgrades).

5. **Fuel Efficiency**

- The **250cc model** is particularly efficient, offering **50-60 mpg** in real-world conditions, making it cost-effective for long rides.

- The **350cc** is still reasonably efficient, though slightly less so than the 250cc.

6. **Resale Value and Community**

- KTM s reputation for reliability keeps resale value decent for used models.

- A strong **off-road riding community** means easy access to parts, maintenance tips, and riding groups.

---

#### **Cons:**

1. **Comfort Limitations**

- The **hard, narrow seat** is not ideal for long rides, especially on the 350cc model.

- **Wind protection is minimal**, making high-speed riding on paved roads less comfortable.

- The **upright riding position** can lead to back fatigue on rough terrain.

2. **Vibration and Noise**

- The **single-cylinder engine** is known for noticeable vibrations, which can be fatiguing over long rides.

- The **exhaust note is loud**, which may not appeal to riders seeking a quieter experience.

3. **Maintenance Requirements**

- The **air/oil-cooled engine** requires more frequent cooling system checks to prevent overheating.

- The **freewheel hub (XC-F) and clutch** may wear out faster than a traditional fixed-gear setup, increasing maintenance costs.

- **Chain and sprocket wear** is common on aggressive riding, requiring regular adjustments.

4. **Limited High-Speed Stability**

- The **lightweight frame and small wheels** make the bike less stable at highway speeds compared to dual-sport or adventure bikes.

- The **suspension is tuned for off-road**, so it may feel harsh or bottom out on rough pavement.

5. **Age and Potential Wear**

- Being **2014-2015 models**, these bikes may have **worn suspension, tires, or clutch** if not well-maintained.

- **Electronics (if equipped with fuel injection) may require occasional calibration** to maintain optimal performance.

6. **Fuel Injection Issues (2014 Models)**

- Some **2014 KTM models with fuel injection** had early teething problems, such as **throttle response lag or fuel delivery issues**.

- A **ECU tune or rebuild** may be needed if the bike has been neglected.

---

### **Conclusion and Recommendation**

The **2014-2015 KTM 250/350 XC-F/SX-F** is a **capable, fun, and reliable off-road bike** that remains a strong choice for riders who prioritize **lightweight handling, suspension travel, and modularity**. It is particularly well-suited for **cross-country (XC-F) or trail riding (SX-F)**, where its agility and power delivery shine.

However, it is **not ideal for long-distance touring, highway cruising, or riders who dislike vibrations and noise**. If you plan to use it primarily for **technical trails, enduro, or light trail riding**, this bike offers excellent value especially if you find one in **good condition with a service history**.

#### **Recommendations Before Purchase:**

1. **Inspect the Suspension** Check for leaks, worn seals, or excessive play in the shocks.

2. **Test the Clutch & Freewheel (XC-F)** Ensure smooth engagement and no excessive wear.

3. **Check the Engine & Exhaust** Listen for unusual noises (knocking, rattling) and inspect for carbon buildup or leaks.

4. **Verify Fuel System (if FI)** Ensure the ECU is calibrated properly and there are no fuel delivery issues.

5. **Tires & Wheels** Replace if they are **worn or damaged**, as they are critical for off-road performance.

6. **Test Ride on Different Terrain** Confirm that the bike handles well on both **trails and light pavement**.

#### **Best For:**

- **Beginner to intermediate riders** looking for an affordable, capable off-road bike.

- **Riders who prioritize agility and suspension** over comfort.

- **Those who enjoy maintenance and upgrades** (KTM s modularity makes it easy to customize).

#### **Not Ideal For:**

- **Long-distance riders** who need comfort and wind protection.

- **Highway-focused riders** who require stability at speed.

- **Riders who dislike engine noise or vibrations**.

#### **Final Verdict:**

If you find a **well-maintained example** with a **clean service history**, this KTM is a **great buy** for off-road enthusiasts. However, if you can stretch your budget, a **newer model (2016 ) or a used Husqvarna or Yamaha** (with similar specs) might offer slight improvements in comfort and technology. For the right buyer, this bike remains a **fantastic off-road machine** that delivers strong performance for its price.

Details:

Photos of the donor bike are for reference only. Photographs are part of the. Since they are used, scratches, scuffs, and abrasions typical to normal wear tear. Needs nothing.

It will never be extended. Search by Manufacturer: Shipping: Orders placed and paid for 11:00 AM Central M-F will typically ship the same day. Ready to install. Freewheel clutch, and freewheel gear.

All parts are in excellent used condition with no abnormal wear, damage, or repairs. OEM flywheel. Correct fit for 2014 2015 250 350 XC-F and SX-F. The freewheel one-way clutch works properly.

part #: 77839005044 prices

  • $330.00-$442.33

specifications cyclevintagee:

  • for models: Xc, Sx, 250, 350
  • for makes: Ktm
  • for years: 2014-2015
  • mpn: 77839005044
  • part type: Rotor Flywheel Clutch Gear
  • country of origin: Austria

returns cyclevintagee:

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

general cyclevintagee:

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

offer cyclevintagee:

  • options: Ship-to-home
  • quantity: 1
  • sold: 0
  • started: April 28, 2026
  • availability: In Stock

seller cyclevintagee:

  • city: Conroe, Texas
  • rating: 100.0%
  • # reviews: 2660

payments cyclevintagee:

  • wallet: Apple-pay
  • other
  • credit card: Diners-club

shipping cyclevintagee:

  • service: UPS Ground
  • carrier: UPS
  • type: Fixed
  • cost: $10.00
  • transit: 3-8 Days
  • class: Standard
for models: xc, sx, 250, 350, for makes: ktm, for years: 2014-2015, part type: rotor flywheel clutch gear, country of origin: austria,
category: motorcycle parts > motorcycle scooter parts accessories, sku: 22032222521084752,
Ktm 77839005044 Is Similar To:
cyclevintagee logo
2 offers $330.00–$442.33 USD
  • Used. Offer #1 priced at $330.00 + $25.00 shipping estimate = $355.00* total. This component is essential for the proper functioning of the engine, ensuring smooth operation and efficiency The product is a steel rotor magnet freewheel designed for KTM SX-F250-350 and Husqvarna FC250 models from 2014 to 2015.+$25.00 shipping
  • Used. Offer #2 priced at $442.33 + $40.25 shipping estimate = $482.58* total. This is used and might show wear (scratches, scuffs, etc.) For Sale is a Used OEM KTM SXF 250 2015 FLYWHEEL ROTOR MAGNET .+$40.25 shipping

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