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KAVS R53 MINI Cooper S Lightweight Crankshaft Pulley

The KAVS Motorsport Lightweight Crankshaft Pulley is a fantastic addition to your R52/R53 Cooper S, whether or not you’re already reaping the benefit of one of our Reduced Supercharger Pulleys or Enlarged Alternator Pulleys.

Our Lightweight Crankshaft Pulleys are forged, solid units; far superior to weaker, machine cut pulleys, as offered by our competitors, which can be prone to failure. The last supercharged Cooper S rolled off the production line in 2008; meaning that many of these cars are getting on; many of which are already over a decade old. A common problem due to aging is that the rubber starts to fail, severely reducing the reliability of your engine.

The OEM crankshaft pulley weighs approx 2600g (2.6kg) - in comparison, the +2% KAVS Motorsport Lightweight Crankshaft Pulley weighs just 550g (0.55kg)!

Why do we offer larger pulleys over standard?

As you reduce the size of your supercharger pulley, seeking higher performance, you increase the demands on your crankshaft; spinning it faster than its usual operating speed. By enlarging the size of the crankshaft pulley, you allow the engine to work at its normal pace, reducing the rotating mass within the engine, while still delivering the higher boost you have gained by introducing a smaller supercharger pulley to the powertrain.

The end result is more reliability, reduced engine drag, higher horsepower and torque figures; with more efficient power delivery.

To truly enhance the power and efficiency of your MINI’s engine, combine all three of our pulleys;

  • KAVS Motorsport Reduced Supercharger Pulley
  • KAVS Motorsport Lightweight and Enlarged Crankshaft Pulley
  • KAVS Motorsport Lightweight and Enlarged Alternator Pulley

A brand new crankshaft bolt must be used during installation. Please note that this is an un-dampened pulley, and you must be aware of the risks in running and un-dampened aftermarket pulley, as a replacement to the dampened OEM pulley.

Installation is made easier by baking the pulley in the oven at 120C for approx 10 minutes, then fitting straight on whilst hot. Please note that a new crankshaft bolt should be used during installation.

  • KAVS 0% approx 139mm
  • KAVS 1% approx 140-141mm
  • KAVS 2% approx 142mm
  • KAVS 3% approx 143mm