GFB Lightened Underdrive Pulley Kit 

Made from single 6061-T6 aluminium alloy billet, then precision CNC machined to exacting tolerances and anodized black for a stealthy appearance and superior wear resistance.

This kit is supplied with 3 pulleys, not just for looks - the combined saving of 2.2 kg is significantly more than what is achieved by replacing just the crank pulley alone.

The weight doesn’t tell the whole story either - even though the saving is a significant 77%, the actual rotating inertia reduction (inertia is what counts) is 83%.

Like all GFB lightweight pulley kits, you can feel the improvements:

  • Sharper throttle response
  • Engine feels more willing to rev
  • Stronger “urge”


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SKU 2016
Brand GFB
Shipping Weight 0.5000kg
Shipping Width 0.200m
Shipping Height 0.350m
Shipping Length 0.100m
Shipping Cubic 0.007000000m3

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