The MX142SP kit contains two precision-moulded POM bushings for 1/4-scale PROMO-MX fork tubes. These components serve as low-friction seats that stabilise lateral movement and restore correct steering geometry where original plastic parts have worn.
POM provides a balance of hardness and low friction, improving wear life under repeated compression and lateral loading. The parts are intended as direct-fit service replacements to maintain consistent fork articulation rather than a high-performance upgrade.
Service fitment is straightforward: disassemble the fork leg, remove the worn bushings, install the MX142SP POM units with correct orientation, then reassemble and verify minimal free play and smooth fork travel.
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