The Lainer Suspension Free Piston kit is supplied as a pair for SHOWA 49 fork applications listed below. This component is used during fork service work to address air management inside the cartridge and restore correct internal function. Use it when the existing free piston, sealing elements or related hardware shows wear, damage or persistent bleed/air issues during servicing.

Built For Real-World Suspension

The free piston plays a practical role in maintaining proper separation and control of internal fluids and trapped air during operation and bleeding. When the system cannot be properly bled or performance becomes inconsistent after normal service, replacement is typically considered as part of a targeted repair.

Inside the System

  • Free piston kit for SHOWA 49 forks (pair)
  • Supplied with bushings, O-ring and oil seals (as supplied by manufacturer)
  • Designed to support an airless cartridge bleed outcome as described by the manufacturer

Setup Considerations

Replace the free piston during a rebuild when the piston surface is marked, the sealing edges are worn, or when seals/O-rings no longer hold consistent pressure and the cartridge cannot be bled correctly. If the existing components are in good condition and the fork bleeds normally with stable operation, replacement may not be necessary for routine maintenance.

Compatibility

  • CRF 450 2017–2020
  • CRF 250 2018–2021
  • RMZ 450 2018–2021
  • KXF 450 2019–2021

Setup & Workshop Notes

Install during fork disassembly with clean workshop practices to prevent seal damage and contamination. Confirm all sealing surfaces are free of burrs and wear before reassembly, and complete a correct bleed procedure after installation.

SKU SHOWA_FREE_PISTx2_40X12
Brand Lainer Suspension
Shipping Weight 0.0050kg
Shipping Size 0.005 x 0.005 x 0.005m
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