1. Antique, Vintage, Historic Motorcycle Parts For Sale
  2. sku: 20346610066628713
  3. KTM 77332023129

KTM 77332023129 Crank Gear Nut RF4 450/505

fits model: Sx, Xc, 450. make: Ktm.

77332023129 Ktm Oem Rf4 Crank Primary Gear And Nut 450/505 Sx Xc Sx-f

( Manufacturer Part Number: 77332023129 ), ( Part Type: Crank Gear ), ( Compatible Year: 2009 )

Review KTM Oem Rf4 Crank Primary Gear And Nut 450/505 Sx f fits SX XC 450

The **KTM 77332023129 RF4 Crank Gear Nut** is a precision-engineered, high-performance component designed exclusively for KTM s 450/505 cc Enduro, Supermotard (SX), and Cross-Country (XC) models, including the popular **SX-F** series. Crafted from a durable, heat-treated alloy steel, this crank gear nut is built to withstand the extreme stresses of off-road riding, where torque fluctuations, aggressive cornering, and rough terrain demand reliability and strength. The nut features a **fine-threaded design** optimized for the specific crankshaft splines of the RF4 engine, ensuring a secure and vibration-free fit that prevents loosening under high RPMs or heavy loads. Its **hexagonal drive configuration** allows for precise torque application using a wrench, minimizing the risk of rounding or stripping during installation or maintenance. The component is treated with a **protective anti-seize coating** to prevent galling and ensure smooth removal in future servicing, while its **precision-machined surfaces** guarantee a snug, interference-free engagement with the crankshaft gear. Ideal for both stock and modified setups, this crank gear nut is a critical part of the drivetrain, contributing to smooth power delivery, reduced wear on the clutch and transmission, and enhanced durability over extended riding sessions. Whether used in competition or daily trail riding, this nut exemplifies KTM s commitment to performance and engineering excellence, ensuring that riders can focus on pushing their limits without worrying about drivetrain reliability.

### **Pros and Cons of buying a KTM 77332023129 RF4 Crank Gear Nut (450/505 SX/XC/SX-F)**

#### **Pros:**

1. **OEM Quality and Fitment** This is an original KTM part, meaning it is designed to match the exact specifications of the RF4 s crankshaft assembly. It ensures proper alignment, torque, and performance without compromising the bike s integrity.

2. **Durability and Performance** KTM uses high-quality materials in their aftermarket and OEM parts, including heat-treated steel for crank components. This ensures longevity, especially in demanding off-road conditions where stress on the crankshaft is high.

3. **Compatibility with Multiple Models** The part is listed as fitting the **450/505 SX, XC, and SX-F** models, making it a versatile choice if you own or plan to own multiple KTM bikes in this range. This reduces the need for multiple part purchases.

4. **Easy Installation** Since it is a direct replacement, installation should be straightforward for someone with basic mechanical skills. KTM parts are designed to fit seamlessly into their own engine layouts, minimizing the need for modifications.

5. **Warranty Coverage** If purchased from an authorized KTM dealer or distributor, this part may come with a warranty, providing peace of mind against defects in materials or workmanship.

6. **Cost-Effective for Long-Term Use** While the upfront cost may be higher than aftermarket alternatives, the reliability of an OEM part can save money in the long run by avoiding premature wear or failure of the crankshaft assembly.

7. **Maintenance and Resale Value** Keeping your bike stock or with genuine KTM parts can help maintain its resale value. It also simplifies maintenance, as mechanics familiar with KTM bikes will be more confident working on a bike with original components.

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#### **Cons:**

1. **Higher Upfront Cost** OEM parts are generally more expensive than aftermarket alternatives. For example, a high-quality aftermarket crank gear nut might cost significantly less while offering similar performance in some cases.

2. **Limited Customization** Unlike aftermarket parts, this is a standard OEM component. If you re looking for performance upgrades (e.g., lighter weight, different material properties), you may need to explore aftermarket options.

3. **Potential Overkill for Minor Repairs** If the issue is isolated to a single component (e.g., a worn-out gear nut) rather than the entire crankshaft assembly, replacing just the gear nut with an aftermarket part could be a more cost-effective solution.

4. **Availability and Lead Times** OEM parts may not always be in stock at local dealers, and ordering directly from KTM or distributors could result in shipping delays, especially if you need the part urgently.

5. **No Performance Gains** This part is not designed to improve performance; it is a replacement for a worn or damaged component. If your goal is to enhance power or handling, you would need to look elsewhere (e.g., upgraded crankshafts, balancers, or clutch systems).

6. **Potential for Counterfeit Parts** If purchasing from unauthorized sellers (e.g., eBay, third-party online marketplaces), there is a risk of receiving counterfeit or substandard parts that could compromise safety or performance.

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### **Conclusion:**

The **KTM 77332023129 RF4 crank gear nut** is a reliable, high-quality OEM replacement that ensures proper fitment, durability, and compatibility with your bike. It is the best choice if you prioritize **original equipment quality, warranty coverage, and long-term reliability**, especially for off-road use where crankshaft integrity is critical.

However, if your budget is tight or you only need a minor replacement (e.g., a single worn gear nut), an **aftermarket alternative** from reputable brands (e.g., KTM s own aftermarket line, Raceface, or other trusted suppliers) could be a more economical option without sacrificing quality. Aftermarket parts often come with similar performance and may offer additional benefits like lighter weight or easier installation.

For most riders, **the OEM part is the safest and most practical choice**, particularly if you value the bike s original specifications and long-term dependability.

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### **Recommendation:** - **Buy the KTM OEM part if:**

- You need a **direct replacement** for a damaged or worn gear nut.

- You want to **maintain the bike s original integrity** and resale value.

- You re comfortable paying a premium for **guaranteed quality and warranty coverage**.

- You own multiple KTM models in the 450/505 range and want a **universal solution**.

- **Consider an aftermarket alternative if:**

- You re on a **tight budget** and the issue is isolated to a single component.

- You re looking for **lighter weight or performance-focused upgrades** (though this part itself doesn t offer those benefits).

- You can t find the OEM part quickly and need a **faster replacement** (ensure the aftermarket part is from a trusted brand).

**Final Verdict:** For most riders, the **KTM 77332023129 crank gear nut is the best choice** due to its reliability, fitment, and compatibility. However, always verify the seller s authenticity and check for any available warranties or return policies before purchasing.

Details:

This is the factory gear that drives clutch basket from crankshaft and includes correct OEM nut ready for installation on RF4 engines used in SX, SX-F, XC model's. KTM 505 SX-F. Compatibility / Fitment. Perfect replacement for worn or damaged primary gears during an engine rebuild using original KTM components.

Used OEM KTM gear and nut. OEM crank primary drive gear. Fits KTM RF4 engine model's including: 450 SX-F. Genuine OEM KTM RF4 crank primary drive gear WITH retaining nut, part number, removed from a 450/505 platform.

Whats Included. Ready for installation after standard inspection. No chipped or broken teeth unless noted. OEM retaining nut INCLUDED.

Ships securely packaged. Shipping Notes. Washers/spacers only if shown in photos.

part #: 77332023129 prices

  • $18.00-$126.00

specifications cyclevintagee:

  • for models: Sx, Xc, 450
  • for makes: Ktm
  • mpn: 77332023129
  • part type: Crank Gear
  • compatible year: 2009

offer cyclevintagee:

  • best offers: True
  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • started: January 31, 2026
  • quantity: 1

payments cyclevintagee:

  • wallet: Paypal
  • other
  • credit card: Discover

returns cyclevintagee:

  • policy: No Returns

seller cyclevintagee:

  • rating: 100.0%
  • city: Vancouver, Washington
  • # reviews: 15

general cyclevintagee:

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

shipping cyclevintagee:

  • service: USPS Ground Advantage
  • transit: 4-9 Days
  • type: Calculated
  • carrier: USPS
  • cost: $5.45
  • class: Standard
for models: sx, xc, 450, for makes: ktm, part type: crank gear, compatible year: 2009,
category: motorcycle parts > motorcycle scooter parts accessories, sku: 20346610066628713,
Ktm 77332023129 Is Similar To:
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5 offers $18.00–$126.00 USD
  • Used. Offer #1 priced at $126.00 + $7.25 shipping estimate = $133.25* total. Since they are used, scratches, scuffs, and abrasions are typical to normal wear and tear. Nice gearsets.+$7.25 shipping
  • Used. Offer #2 priced at $18.00 + $9.89 shipping estimate = $27.89* total. +$9.89 shipping
  • Used. Offer #3 priced at $31.50 + $7.25 shipping estimate = $38.75* total. It will never be extended. Drive and primary crankshaft gears.+$7.25 shipping
  • Used. Offer #4 priced at $35.98 + $40.25 shipping estimate = $76.23* total. This is used and does show wear (scratches, scuffs, etc.).+$40.25 shipping
  • Used. Offer #5 priced at $16.99 + $0.00 shipping estimate = $16.99* total. This includes: bearings, ball joints, bushings, tie rod ends, seals, brake pads, gaskets, pistons, rings, clutch plates, cables, and similar components. This gear is in very good condition and shows normal signs of wear.FREE SHIPPING

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