This aluminum center shaft join is an RC-scale replacement part intended for Kyosho FW05-R and FW05RR chassis, supplied as 3Racing FW05-015. It replaces the stock center coupling to provide a more rigid connection between center shaft segments without implying specific mechanical improvements beyond increased material stiffness.
Compatibility is limited to the FW05-R and FW05RR designations shown in the product name, so verify fit on the vehicle before installation. The part is described as aluminum construction which is commonly chosen to reduce component deformation compared with standard plastic joins.
Installation notes: the join installs in the center driveline where the shaft segments meet, using existing fasteners and locating features of the FW05 platform. During setup keep alignment of the center shaft and driveline straight to avoid binding, and inspect runout after fitting. As a tuning item this part is typically used to reduce driveline play and to provide a firmer connection point when adjusting differential and drivetrain feel.
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