This is an RC-scale spur gear intended for DP48 drive setups, identified as Yokomo model YOKSG-A4886 with an 86-tooth profile. It serves as a direct replacement part for the large spur in compatible DP48 geartrains and is intended for hobby use on 1/10 on-road platforms where spur gear choice affects overall gear ratio.
Compatibility and fit: the product name specifies DP48, so installation assumes a DP48-style gearbox and matching pinion gear interface. Verify centre height and shaft clearance on your chassis before final assembly, and confirm the spur's tooth count matches the gearing plan for the desired ratio.
Installation notes: fit the spur on the differential or gear carrier according to your chassis service manual, keep gear mesh moderate during initial installation, then fine-tune with shims or adjustable motor mount if available to avoid binding. Use the appropriate hex driver for securing set screws and re‑check mesh after the first run.
Tuning role: changing to an 86T spur alters the driven-to-drive ratio; use it when you need a higher driven tooth count for more mechanical advantage at the expense of top speed, or when matching motor/pinion choices to track conditions. Confirm pinion compatibility and secure all fasteners after adjustments.
Maintenance: inspect the teeth for burrs or uneven wear, clean gear debris after runs, and verify that bearings and diff components rotate freely to prevent premature wear of the spur assembly.
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