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KTM Radiator Cooling Digital Fan Kit Review: Keeps KTM engines cool under pressure?

KTM Genuine Radiator Cooling Digital Fan Kit 250 300 350 400 450 500 78135941244
4.7
[Extreme Cooling Performance]  Provides increased airflow for better cooling and sustained engine power in extreme conditions.
[Digital Temperature Controller]  Allows precise temperature monitoring and customizable activation for optimal thermal management.
[Adjustable Activation Range]  Select activation between 150°F and 203°F to match riding conditions.
[Low Power Consumption]  Draws only 30 watts at 12 volts for efficient, reliable operation without excessive battery drain.
[Wide KTM Compatibility]  Fits numerous KTM models; some require optional wire harness 77711979000.
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A radiator cooling fan kit for KTM motorcycles designed to increase airflow and help maintain engine performance in extreme conditions. Riders gain confidence from more consistent power and a readable temperature display with the KTM Radiator Cooling Digital Fan Kit. Is this the right upgrade for specific KTM models and demanding riding conditions?

⚡ At a Glance
  • Cooling Performance: Increases airflow to the radiator, helping maintain better cooling and preserve engine power under heavy use
  • Best for: Off-road KTM riders and racers who push bikes in hot or sustained high-load conditions
  • Not ideal for: Owners of KTM models that already use a suitable OEM fan where no extra wiring or harness is desired

Electric radiator fan with a digital control unit for temperature management. Designed to add airflow and a readable temperature display for selected KTM models.


Precise temperature control - with a digital control unit

Digital control allows selecting the activation temperature between 150 and 203 degrees Fahrenheit, and the deactivation temperature is automatically set to one degree Fahrenheit below the chosen activation point. A readable temperature display shows the current temperature at any time.

Tailors fan activation to prevailing conditions for steady engine cooling, reducing the risk of power loss due to overheating.

Low electrical load - thanks to a 30 watt, 12 volt design

The fan draws 30 watts from a 12 volt electrical supply, a modest power requirement compared with many high-capacity aftermarket fans. Electrical demand remains limited while delivering continuous airflow when active.

Limits strain on the bike's electrical system while delivering effective cooling, suitable for bikes with standard 12V systems.

Wide fitment flexibility - with model-specific harness options

Fitment covers a broad range of KTM models across multiple years, with certain bikes requiring additional wire harnesses part numbers 77711979000 or 77735045000 for proper installation. Compatibility notes list many XC, EXC and XC-W variants.

Offers compatibility across many KTM off-road and competition models, while harness options allow installation where factory wiring differs.

✨ The 4 Key Reasons for KTM Radiator Cooling Digital Fan Kit
  1. Adjustable activation temperature - Fine-tune when the fan engages to match riding conditions
  2. Readable temperature display - Check current coolant temperature at a glance while stopped
  3. Modest power draw - 30 W consumption reduces load on the electrical system during operation
  4. Harness compatibility - Additional harness options enable fitment across many KTM model years
📋 Technical Details at a Glance
  • Category: Radiator cooling fan kit
  • Voltage: 12 volts
  • Power draw: 30 watts
  • Activation temperature range: 150 to 203 degrees Fahrenheit
  • Deactivation behaviour: Automatically 1 °F below selected activation temperature
❓ Frequently Asked Questions

Q: What temperature range can the fan be set to activate at?

A: The activation temperature is freely selectable between 150 and 203 degrees Fahrenheit, with deactivation automatically set to one degree Fahrenheit below the chosen activation temperature.

Q: What are the electrical requirements for the fan kit?

A: The fan runs on a 12 volt system and draws 30 watts while operating.

Q: Will the fan fit my KTM model?

A: Fitment covers many KTM XC, XC-F, XC-W, EXC and related models across various years; some models require an additional wire harness, part numbers 77711979000 or 77735045000, as indicated in the fitment notes.

🏆 Our Verdict

The fan kit suits KTM riders who need reliable cooling during hot or demanding off-road use. Selectable digital temperature control and a clear readout are the key selling points for maintaining power and avoiding overheating. While individual cost depends on supplier, the kit represents a targeted upgrade that can protect engine performance over time.