This 93mm dog bone-style center drive shaft from Yokomo, model S4-010C93A, is made to work with the YZ-4S center differential to enhance drivetrain stability and on-track consistency. It provides a direct replacement that preserves correct geometry for the YZ-4S setup.
The 93mm length is matched to the YZ-4S center diff layout to reduce drivetrain play and support cleaner power transfer. Accurate machining helps lower wear on mating parts while keeping alignment true under load.
This center drive shaft fits the YZ-4S chassis, including the B-YZ4SF variant, and installs with common hand tools. Hobbyists can swap it in quickly during routine maintenance or as part of an upgrade path.
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