This component is the standard front center drive shaft used on the YZ-4S layout, specified as a 66mm dogbone for applications that require the longer center bone. It is intended for use on the RC YZ-4S platform when configuring or servicing the center drive and slipper clutch arrangement.
Installation context: the 66mm length is selected to clear the slipper clutch assembly and maintain correct driveline geometry at the front center position. When replacing or servicing the center dogbone, confirm fit with the existing outdrives and slipper components to ensure smooth operation.
Tuning role: swapping to the 66mm dogbone primarily affects driveline engagement and component spacing; use it when slipper clutch installation or clearance constraints require the longer center bone, and verify axle alignment and bearing seating after fitment.
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