This item serves as the front centre drive shaft for the YZ-4S arrangement, provided as a 66mm dogbone where a longer centre bone is required. It is designed for use on the RC YZ-4S chassis when fitting or maintaining the centre drive and slipper clutch setup.
Fitment advice: the 66mm length helps clear the slipper clutch assembly and keeps proper driveline geometry at the front centre position. During replacement or maintenance, confirm compatibility with your existing outdrives and slipper components to avoid binding.
Performance impact: selecting the 66mm dogbone influences driveline engagement and spacing between components; opt for it when slipper clutch clearance or installation constraints demand the longer centre bone, and recheck bearing seating and axle alignment after fitting.
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