This is a service replacement king pin set for the Axial Racing Yeti XL front knuckle, listed under GPM model YTL004S. The pack contains four steel king pins that locate the knuckle in the hub carrier and resist the shear loads typical in off-road RC use.
Replacement is straightforward for experienced hobbyists: remove the wheel and knuckle assembly, extract the worn pins from the hub carrier, and fit the new steel pins ensuring correct seating and alignment with the existing bearings and hardware. Check for free rotation and avoid over-tightening adjacent hex screws to prevent binding.
Fit these pins as direct replacements for damaged or worn items, and inspect mating faces during routine servicing to maintain consistent steering feel and suspension behaviour.
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