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Aftermarket Assassins Defender Adjustable Helix Kit
Aftermarket Assassins Defender Adjustable Helix Kit
Aftermarket Assassins Defender Adjustable Helix Kit

Aftermarket Assassins Defender Adjustable Helix Kit

108-1040

Aftermarket Assassins

  • Save $ 17.50

Fits:

  • 2026 Defender HD11
  • 2020+ Defender HD10
  • 2022+ Defender HD9 models (Defender HD9/HD10 models must already have our black secondary spring)

Choose between two helix styles:

    • Performance Helix 1053 is an aggressive helix with acceleration/higher horsepower/aggressive fast pace drivers in mind.
    • High Load Helix 1050 is slightly less aggressive than the 1053 helix with good acceleration gains/power transfer over the OEM helix. Designed for a heavier vehicle, heavier tires, heavy sand load or crawling type riding in mind.
  • Easy to adjust!  The primary weights are a great tuning tool to have, but being able to adjust the helix allows for quicker adjustments.  This allows you to easily dial in your peak RPM for optimum performance and is especially important for those that switch tires often or ride both dunes & trails.
  • This kit includes:  AA adjustable helix and helix adjustment tools
  • A must-have when changing tires, tuning your machine, or running paddles
  • Excellent acceleration gains and better power transfer to the rear wheels
  • Helix Installation Video:
  • You will need a clutch compression tool to install the helix.  This is a drop down option, and you can see this tool HERE
  • We found the stock secondary spring to work the absolute best out of 50+ we've tested with, hands down.  
  • Defender HD9/HD10 peak RPM for stock tuning is 6000-6300 @ 40-50 MPH.  Peak RPM for AA tuning is 6400-6700 RPM @ 40-50 MPH for best performance.
  • Part number: 108-1040

ecs 7-1-26