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.

34 Products Found



Kayaba (KYB) Genuine Motorcycle Parts

Piston complete rcu

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120204000401)
 
$179.47
5 In Stock

Kayaba (KYB) Genuine Motorcycle Parts

Piston complete rcu

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120204400201)
 
$179.47
1 In Stock
















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.