On powerful motorcycles, the forces created by the spinning driveshaft and differential can severely affect the suspension and handling, an effect known as "shaft jacking". Moto-Guzzi first offered an anti-jacking system in the 1990's on the Daytona, and this system was developed over the years into what is now known as CARC. Broadly similar to the BMW Paralever or Kawasaki TetraLever setups, CARC is available on all larger engined bikes throughout the current Moto-Guzzi lineup. The smaller 750cc machines are not powerful enough to be badly affected by shaft jacking and are offered with a traditional driveshaft and swingarm.
The system separates the shaft final drive’s torque reaction from the suspension via floating torque arms and so eliminates the abruptness typical of shaft drive systems on acceleration or throttle-release. This produces a reliable, low-maintainable drive system with a very smooth ride.
photo © by Motorrad67
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