Motorcycle Shock Piston & Seals Assembly

Teknik Shock Main Piston Assembly

Shock Main Piston Assembly

Your rear shock absorber contains a machined metal piston disc with passages that meter oil flow between compression and rebound; these assemblies rely on a rubber o-ring and a PTFE-coated bush or soft PTFE band to seal the outer diameter. OEM KYB & Showa main piston assemblies include fitted rubber o-rings and metal bushing rings or outer gapless bands, with valving shim stacks arranged for compression and rebound and secured by a locknut. Learn more about valving and shim setups with our DIY damping adjustment guide and shim equivalence calculator.

Main piston assemblies for sealing and controlled valving

  • Restore factory sealing with replacement o-rings, bushes or PTFE bands
  • Rebuild or tune compression and rebound using matched shim stacks
  • Maintain predictable damping by replacing worn pistons and locknuts

Recommended Pairings

Consider pairing with Suspension Tools for rebuilds and accurate shim stacking.

Shop Shock Main Piston Assembly

Browse KYB & Showa main piston assemblies, piston seals, bands and shim kits to rebuild your shock and restore damping performance.

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Shock Main Piston Assembly

Your rear shock absorber contains a machined metal piston disc with passages that meter oil flow between compression and rebound; these assemblies rely on a rubber o-ring and a PTFE-coated bush or soft PTFE band to seal the outer diameter. OEM KYB & Showa main piston assemblies include fitted rubber o-rings and metal bushing rings or outer gapless bands, with valving shim stacks arranged for compression and rebound and secured by a locknut. Learn more about valving and shim setups with our DIY damping adjustment guide and shim equivalence calculator.

Main piston assemblies for sealing and controlled valving

  • Restore factory sealing with replacement o-rings, bushes or PTFE bands
  • Rebuild or tune compression and rebound using matched shim stacks
  • Maintain predictable damping by replacing worn pistons and locknuts

Recommended Pairings

Consider pairing with Suspension Tools for rebuilds and accurate shim stacking.

Shop Shock Main Piston Assembly

Browse KYB & Showa main piston assemblies, piston seals, bands and shim kits to rebuild your shock and restore damping performance.