This precision aluminium motor spacer and matched gear set is supplied as 1 pr for use on Kyosho Mini-Z AWD cars. It locates the motor pinion relative to the main spur on MR-03 AWD platforms to deliver more consistent gear contact under load.
The package combines an aluminium spacer with three motor gear choices and matching main gear pairings listed in the title, so you can alter final drive characteristics by swapping pinion sizes without changing the gearbox case. The aluminium spacer resists compression and helps preserve alignment compared with standard plastic mounts.
Installation guidance: remove the original motor mount parts, place the spacer to achieve the desired pinion position, then fit the selected motor gear ensuring clean engagement with the main gear. After assembly check backlash, endplay and free spin before running the model. Apply thread lock where recommended and avoid forcing gears into mesh.
Tuning note: selecting different pinion/spur pairings changes acceleration and top speed on short circuits, while the spacer helps keep mesh consistent throughout setup iterations. This product is intended for RC Mini-Z AWD race or practice cars only.
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