Starter Motor for KTM 450 500 & Husqvarna FC FE 450 501 | 79440001000

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.