VehiclesTamiya TRF421X Chassis KitShock service
Maintenance reference
Shock service
Tamiya TRF421X Chassis Kit · 42391
TRF421X Chassis Kit kit 42391; exact 32-page manufacturer PDF edition
← Vehicle service referenceStart with the correct reference
Damper assembly and filling reference for the exact kit. Spring/friction units use their own assembly instructions; no replacement interval is specified.
- Tamiya 42391 instruction manual, PDF pp. 16-17 (opens in a new tab)
Assembly drawing · Tamiya 42391 TRF421X Chassis Kit; 32-page PDF
An assembly drawing shows the components; it does not provide a complete service sequence.
Parts, tools and consumables
Listed in the reference
- Damper oil listed in kit instructionsconsumableRequirement source, PDF p. 16 (opens in a new tab)
- Tissue paper for excess damper oilconsumableRequirement source, PDF p. 16 (opens in a new tab)
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
- Shocks
- Big bore front and rearStock
Keep the axle positions and original units shown. Values describe the cited configuration. Replacement-derived and community figures keep their stated basis.