Drivetrain service

Start with the correct reference

Spool cups, gear orientation, bearings and gearbox installation are shown. The stock spool has no differential action; the pictured gear and ball differentials are optional conversions.

• Spool and gearbox assembly, PDF pp. 25-27 (opens in a new tab)

  Manufacturer procedure · 34551-T01,2026

• Gearbox and spool exploded references, PDF pp. 46-47 (opens in a new tab)

  Assembly drawing · 34551-T01,2026

  An assembly drawing shows the components; it does not provide a complete service sequence.

Parts, tools and consumables

Part links open an exact-model OEM listing. Quantities, reused hardware and condition-dependent replacements may need checking in the manual. A listed part is not an instruction to replace it.

Setup specifications

Installed pinion

24 teethStock

Sources

• Source 1: rc.kyosho.com (opens in a new tab)
• Source 2: rc.kyosho.com (opens in a new tab)
• Source 3: kyosho.com (opens in a new tab)
• Source 4: rc.kyosho.com (opens in a new tab)

Installed spur

84 teethStock

Sources

• Source 1: rc.kyosho.com (opens in a new tab)

Spur pitch

48PStock

Sources

• Source 1: rc.kyosho.com (opens in a new tab)

Keep the axle positions and original units shown. Values describe the cited configuration. Replacement-derived and community figures keep their stated basis.