This aluminum rear suspension mount is an optional component for the 4WD YZ-4 line, intended for use with the L5 suspension arm. The RF version adjusts the front-side suspension pin spacing compared to the standard rear mount, reducing the distance between pins by 2mm versus the stock rear mount.
When fitted together with the matching rear mount Z4-300LRR and the 1mm longer L5 arm Z4-008RS5, the arrangement allows a wider track while preserving the longer arm geometry. That combination helps retain roll characteristics while giving a slightly wider stance.
On high-grip surfaces such as carpet or artificial turf, pairing a firmer suspension configuration with this mount can promote a moderate amount of chassis roll and improved turn response without harming the base handling. To even out front and rear, combine this part with the 1mm longer front arm Z4-008F1 for a more neutral feel.
Tuning role and installation notes: provided as a tuning option rather than a direct replacement for standard geometry; check pin alignment and clearances at installation and perform gradual spring and damper adjustments to suit high-grip conditions.
Compatibility: Supported chassis B-YZ2DTMW / B-YZ2CA / B-YZ2DT / B-YZ2DTM / B-YZ4
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