Description
A pair of rear swing shafts for the Kyosho Scorpion XXL.
The swing shaft, commonly called a dogbone, carries torque from the differential outdrive to the wheel hub while allowing the angle between them to change as the suspension moves through its travel. It has to transmit the full drivetrain load through a joint that is articulating constantly, which makes it one of the hardest-working parts on the car. On a large-scale buggy the torque figures are higher than on a normal 1/8 or 1/10 machine, so these shafts see a correspondingly harder life.
Wear appears at the ends first. The bone tips round off and the outdrive cups they sit in open up, and the play that results shows as a knock under acceleration and a clunk when you lift off the throttle. Left long enough, a worn shaft pops out of its cup mid-corner and drive to that wheel disappears entirely.
Because both sides wear at the same rate, replacing them as a pair is the sensible approach. Two are supplied.
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