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Starter Motor for KTM 450 500 & Husqvarna FC FE 450 501 | 79440001000
Starter Motor for KTM 450 500 & Husqvarna FC FE 450 501 | 79440001000
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Product Overview
Restore dependable engine-starting performance with this 12V electric starter motor, designed for compatible KTM 450/500 and Husqvarna 450/501 four-stroke off-road motorcycles.
Featuring a 9-tooth drive gear and an OEM-style 0.5 kW configuration, this starter motor helps provide smooth and consistent engine cranking when the original unit becomes weak, slow, intermittent, or unable to start the engine.
The durable metal housing and wear-resistant internal components are designed to withstand repeated starts, engine heat, vibration, dust, mud, and demanding enduro or motocross riding conditions.
This starter replaces both the earlier 78140001000 unit and the later 79440001000 starter when the OEM number, mounting dimensions, drive gear, terminal position, and housing design match the original part. KTM and Husqvarna parts diagrams describe these units as complete 0.5 kW electric starters.
Product Compatibility
KTM 450 Fitment
| Brand | Model | Year Range | Fitment Notes |
|---|---|---|---|
| KTM | 450 EXC | 2012–2016 | Includes applicable Six Days versions |
| KTM | 450 EXC-F | 2017–2024 | Includes applicable Six Days versions |
| KTM | 450 SX-F | 2013–2024 | Verify standard or regional model |
| KTM | 450 SX-F Factory Edition | 2012–2024 | Confirm OEM starter number |
| KTM | 450 XC-F | 2013–2024 | Match mounting and terminal position |
| KTM | 450 XC-W | 2012–2016 | Confirm OEM 78140001000 |
| KTM | 450 XCF-W | Selected 2020–2024 models | Verify exact model year |
| KTM | 450 SMR | 2013–2014; 2021–2024 | Two separate production ranges |
KTM 500 Fitment
| Brand | Model | Year Range | Fitment Notes |
|---|---|---|---|
| KTM | 500 EXC | 2012–2016 | Includes applicable Six Days versions |
| KTM | 500 EXC-F | 2017–2024 | Includes applicable Six Days versions |
| KTM | 500 XC-W | 2012–2016 | Confirm OEM starter number |
| KTM | 500 XCF-W | Selected 2020–2024 models | Verify exact year and market |
Aftermarket interchange catalogs list the earlier 78140001000 starter for 2012–2016 KTM EXC, XC-W, SX-F and XC-F applications, while later catalogs list 79440001000 for EXC-F, SX-F, XC-F, SMR and related models. The official 2024 KTM 500 EXC-F parts diagram lists 79440001000.
Husqvarna Fitment
| Brand | Model | Year Range | Fitment Notes |
|---|---|---|---|
| Husqvarna | FC 450 | 2014–2024 | Earlier and later OEM-number generations |
| Husqvarna | FE 450 | 2014–2024 | Verify regional model code |
| Husqvarna | FE 501 | 2014–2024 | Confirm OEM and physical dimensions |
| Husqvarna | FE 501S | 2015–2016; selected 2020–2024 models | U.S. street-legal version |
| Husqvarna | FS 450 | 2015–2024 | Supermoto application |
| Husqvarna | FX 450 | 2017–2024 | Cross-country application |
The earlier 78140001000 starter is listed for 2014–2016 FC 450, FE 450 and FE 501 applications. Later models use 79440001000; 2024 parts listings confirm this number for FE 450, FE 501, FC 450 and FS 450 models.
Fitment can vary by market, model suffix, special edition and production year. Always confirm the original starter number before ordering.
OEM Cross-Reference Numbers
KTM / Husqvarna
- 78140001000
- 79440001000
Aftermarket Cross References
- Arrowhead: SMU0532
- J & N Electrical: 410-54166
- NICHE: 519-CSM2403O
The earlier 78140001000 number has been superseded by 79440001000 in compatible applications. Both numbers are commonly cross-referenced to Arrowhead SMU0532.
Your original starter does not need to display every number listed above. However, at least one compatible OEM or confirmed interchange number should match your original unit or motorcycle parts catalog.
Specifications
| Specification | Details |
|---|---|
| Product Type | Electric Starter Motor |
| Voltage | 12V |
| Rated Output | 0.5 kW OEM-style configuration |
| Drive Gear | 9 Teeth |
| Rotation | Verify by drive-end orientation and OEM number |
| Mounting-Hole Distance | 39 mm / 1.53 in |
| Drive Gear Diameter | 12 mm / 0.47 in |
| Overall Length | 143 mm / 5.63 in |
| Overall Width | 60 mm / 2.36 in |
| Fitment Type | Direct Replacement |
| Vehicle Type | Off-Road Motorcycle |
| Housing Material | Metal |
| Condition | New |
| Package Quantity | 1 Starter Motor |
The original 143 mm / 5.62 in measurement has been adjusted to approximately 5.63 in for a more accurate metric conversion.
Rotation terminology varies between replacement catalogs. Some list this starter as clockwise, while others describe it as counterclockwise because they measure rotation from different ends. Match the OEM number and physical configuration rather than relying only on the rotation label.
Key Features
- Broad KTM and Husqvarna Fitment: Designed for compatible 450cc, 500cc and 501cc four-stroke off-road motorcycles.
- 12V 9-Tooth Configuration: Matches compatible OEM starting systems using a nine-tooth drive gear.
- Reliable Cranking Performance: Helps restore consistent startup when the original starter becomes weak, slow or intermittent.
- Wear-Resistant Construction: Durable metal housing and internal components withstand repeated starts, heat and vibration.
- Direct-Replacement Design: Matches the original-style installation when the OEM number and dimensions are correct.
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Fitment FAQ
Will this part fit my specific model and year?
This starter motor is designed for selected KTM 450/500 and Husqvarna 450/501 four-stroke motorcycles produced between 2012 and 2024.
Applicable model families include:
KTM 450 EXC, EXC-F, SX-F, XC-F, XC-W, XCF-W and SMR
KTM 500 EXC, EXC-F, XC-W and XCF-W
Husqvarna FC 450, FE 450, FE 501, FE 501S, FS 450 and FX 450
The exact starting year varies by model. Your original starter must use OEM 78140001000 or 79440001000 and match the listed gear, dimensions, mounting points and terminal position.
Do I need to match the OEM part number?
Yes. Matching the complete OEM number is one of the most reliable ways to confirm fitment.
This starter motor replaces:
78140001000
79440001000
Arrowhead SMU0532
J & N 410-54166
NICHE 519-CSM2403O
The original starter does not need to display every number listed above. At least one compatible OEM or confirmed interchange number should match the original part or your motorcycle’s parts diagram.
The later 79440001000 number supersedes the earlier 78140001000 in compatible applications.
What models or situations does this part not fit?
This starter motor is not intended for:
KTM or Husqvarna motorcycles using a different OEM starter number
Two-stroke EXC, XC-W, TE or TC models
KTM 250, 300 or 350 models unless the OEM number is independently confirmed
Husqvarna FC, FE or FX 250/350 models using a different starter
KTM 690 or Husqvarna 701 motorcycles
Applications requiring a different number of drive teeth
Starters with different mounting-hole spacing
Models with a different electrical terminal position
Motorcycles with engine swaps or modified starting systems
Applications where the original housing or drive-end shape differs
Do not assume that every KTM or Husqvarna 450 uses the same starter motor.
What should I check before ordering?
Before ordering, confirm:
Motorcycle brand and complete model name
Exact production year
Model suffix, such as EXC-F, SX-F, XC-F, Six Days, Factory Edition, FE, FC, FS or FX
OEM or confirmed interchange number
12V electrical system
Nine-tooth drive gear
39 mm / 1.53 in mounting-hole distance
12 mm / 0.47 in drive gear diameter
143 mm / 5.63 in overall length
60 mm / 2.36 in overall width
Electrical terminal position
Mounting-point locations
Starter housing and drive-end shape
Rotation direction viewed from the same end
Condition of the O-ring and sealing surface
Also inspect the battery, starter relay, fuse, wiring, ground connections, torque limiter, starter gears and one-way clutch. A fault elsewhere in the starting system can produce symptoms similar to a failed starter motor.