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  3. KTM 54630000944

KTM 54630000944 Engine Crankcase Set 6D

fits model: 300mxc, Mxc, Sx, 300. make: Ktm. year: 1998.

54630000944 Ktm 98 300mxc Matched Engine Crankcase Case Set Exc Mxc Sx 300 6d

( Manufacturer Part Number: 54630000944 ), ( Part Type: Engine Case ), ( Country Of Origin: Austria )

Review KTM Matched Engine Crankcase Case Set Exc 6d fits 300MXC MXC SX 300 1998

The **KTM 54630000944 98 300MXC Engine Crankcase Set** is a high-performance, precision-engineered component designed exclusively for the KTM 300 MXC and 300 SX models, specifically tailored for the 2009 model year (denoted by the "98" designation). This crankcase set represents a critical upgrade for riders seeking enhanced reliability, improved power delivery, and extended engine longevity. Crafted from high-grade aluminum alloy, the crankcase is machined to exacting standards to ensure optimal sealing, reduced friction, and superior heat dissipation key factors that contribute to both performance and durability. The set includes a meticulously balanced crankshaft assembly, featuring forged steel components that are heat-treated for maximum strength and resistance to fatigue, even under the most demanding off-road conditions. The integrated oil pump and timing components are precision-machined to maintain consistent lubrication and timing accuracy, which is essential for maintaining peak engine efficiency and preventing premature wear. This crankcase set is particularly beneficial for riders who push their bikes to the limits, as it helps mitigate the stresses of aggressive riding, high RPMs, and extreme terrain. Whether used in competition or for serious training, this upgrade ensures that the engine operates with improved smoothness, responsiveness, and reliability, making it a standout choice for those who demand nothing less than the best from their KTM. Compatible with the 6-speed transmission (indicated by the "6D" designation), this set is a direct replacement for the stock crankcase, offering a seamless fit without the need for additional modifications. For riders looking to future-proof their engines or restore performance after heavy use, this crankcase set is an indispensable investment that combines engineering excellence with the rugged heritage of KTM s off-road machinery.

### **Pros and Cons of buying a KTM 54630000944 98 300MXC/SX Engine Crankcase Set**

#### **Pros:**

1. **OEM Quality and Fitment** This is an original KTM part, meaning it is designed specifically for the 300MXC/SX engine. It ensures proper fitment, performance, and compatibility without modification.

2. **Reliability and Durability** KTM uses high-quality materials and precision engineering in their crankcase sets. This part is built to withstand the stresses of off-road riding, reducing the risk of premature failure.

3. **Performance Optimization** The crankcase set is part of the engine s structural foundation, affecting power delivery, oil flow, and overall engine efficiency. A genuine part ensures optimal performance rather than aftermarket alternatives that may compromise balance or strength.

4. **Warranty Coverage** Purchasing from an authorized KTM dealer or distributor may include warranty protection, offering peace of mind in case of defects.

5. **Resale Value** Using OEM parts helps maintain the bike s value if you plan to sell it later, as buyers prefer fully stock or easily repairable machines.

6. **Ease of Installation** Since it s a direct replacement, installation is straightforward if you have basic mechanical skills or access to a professional mechanic.

7. **Compatibility with Other OEM Parts** Using genuine KTM parts ensures that other components (e.g., pistons, bearings, seals) will integrate seamlessly, reducing the risk of mismatches.

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#### **Cons:**

1. **High Cost** OEM parts are significantly more expensive than aftermarket alternatives. The crankcase set alone can cost several hundred dollars, adding to repair expenses.

2. **Limited Availability** Depending on your location, genuine KTM parts may not always be in stock at local dealers, requiring online ordering or shipping delays.

3. **No Customization Options** Unlike aftermarket crankcase kits, this part does not offer performance upgrades (e.g., increased compression, lightweight materials) or aesthetic modifications.

4. **Potential Overkill for Minor Issues** If the crankcase is only slightly damaged (e.g., minor cracks or wear), replacing the entire set may be excessive. In such cases, a refurbished or remanufactured part could be a more cost-effective solution.

5. **Installation Complexity** While straightforward, replacing a crankcase requires disassembling the engine, which may be time-consuming for inexperienced mechanics. Professional labor can add to the cost.

6. **Depreciation Factor** If the bike is older or has high mileage, the cost of an OEM crankcase set may not be justified unless it s part of a full engine rebuild for performance or longevity.

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### **Conclusion**

The **KTM 54630000944 98 300MXC/SX crankcase set** is a high-quality, reliable choice for those prioritizing **durability, performance, and authenticity**. It is ideal for:

- **Full engine rebuilds** (e.g., after an accident or severe wear).

- **Owners who value OEM parts** for long-term reliability and resale value.

- **Riders who plan to keep the bike for many years** and want to avoid compatibility issues with aftermarket components.

However, if you're on a tight budget or only need a partial repair, **aftermarket or remanufactured alternatives** (e.g., from reputable brands like **MotoCross Parts, JE, or KTM s own remanufactured program**) may offer a more economical solution without sacrificing quality.

### **Recommendation:** - **Buy the OEM crankcase set if:**

- You re doing a **complete engine overhaul** and want the best fitment and performance.

- You have **access to professional installation** (or the skills to do it yourself).

- The bike is **high-value or a project you plan to restore** to like-new condition.

- **Consider alternatives if:**

- You only need a **partial repair** (e.g., a cracked case without full engine disassembly).

- Budget is a concern **remanufactured or aftermarket sets** (from trusted brands) can be just as reliable at a lower cost.

- You re unsure about the extent of damage **consult a mechanic first** to avoid unnecessary expenses.

For most riders, **balancing cost and quality**, a **genuine KTM part is the safest long-term choice**, but always weigh it against your specific needs and budget.

Details:

Matched crankcase set P/N removed from a very low time 1998 300MXC. S/N 8-556 22087. This case set is in very good condition. There is slight elongation of the swing arm pivot bolt hole, as common on these cases.

part #: 54630000944 prices

  • $99.95-$385.00

specifications cyclevintagee:

  • for models: 300mxc, Mxc, Sx, 300
  • for makes: Ktm
  • for years: 1998
  • mpn: 54630000944
  • part type: Engine Case
  • country of origin: Austria

general cyclevintagee:

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

offer cyclevintagee:

  • started: May 6, 2026
  • sold: 0
  • availability: In Stock
  • quantity: 1
  • options: Ship-to-home
  • best offers: True

payments cyclevintagee:

  • wallet: Apple-pay
  • credit card: Visa
  • other

shipping cyclevintagee:

  • type: Fixed
  • transit: 2-6 Days
  • class: Standard
  • carrier: UPS
  • cost: $22.00
  • service: UPS Ground

seller cyclevintagee:

  • rating: 100.0%
  • # reviews: 5509
  • city: Branson, Missouri

returns cyclevintagee:

  • policy: Returns Accepted
  • time: 14 Days
  • paid by: Buyer
for models: 300mxc, mxc, sx, 300, for makes: ktm, for years: 1998, part type: engine case, country of origin: austria,
category: motorcycle parts > motorcycle scooter parts accessories, sku: 22183967079181711,
Ktm 54630000944 Is Similar To:
cyclevintagee logo
4 offers $99.95–$385.00 USD
  • Used. Offer #1 priced at $385.00 + $22.00 shipping estimate = $407.00* total. There is slight elongation of the swingarm pivot bolt hole, as is common on these cases This case set is in very good condition.+$22.00 shipping
  • Used. Offer #2 priced at $329.99 + $30.00 shipping estimate = $359.99* total. 1998 KTM 380 EXC. OEM Engine Crankcase Set Assembly.+$30.00 shipping
  • Used. Offer #3 priced at $99.95 + $26.05 shipping estimate = $126.00* total. Fitment: Bikes shown in chart . Has a major repair to the clutch arm/front sprocket area as shown.+$26.05 shipping
  • Used. Offer #4 priced at $259.99 + $0.00 shipping estimate = $259.99* total. Removed From: 1998 KTM 300.FREE SHIPPING

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