TRF421X Spacer for Precision Tuning 3.0x4.0x2.7mm - Tamiya 9803571  [9803571]

3.0x4.0x2.7mm precision hop-up spacer

The Tamiya 9803571 spacer is crafted for accurate spacing tasks on TRF421X-compatible assemblies. Cited together with reference number 42391, it provides controlled, repeatable increments for areas that demand close tolerances like bearing seats, link pivots, and chassis fixings.

Employ the spacer to remove axial slack, adjust gear mesh, or make subtle suspension geometry changes without major component swaps. Its 3.0x4.0x2.7mm size fits the tight spaces common on touring car chassis and detailed hop-up applications.

To fit, check the orientation, place the spacer on the shaft or into the bore, and reassemble the sub-assembly. Take care not to over-tighten or preload bearings excessively; verify by hand-rotating the part to ensure freedom of movement.

When tuning, use this spacer as one incremental option among others to refine handling. Minor shifts in spacer thickness or stacking can influence roll center, toe link angles, and gear engagement, so document changes and validate on track progressively.