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

Showa Genuine Parts Piston 50mm

Showa Genuine Parts

Showa Genuine Parts Piston 50mm

Showa Genuine Motorcycle Suspension Parts
(SKU: R24005003)

$118.80
8 In Stock

Showa Genuine Parts Piston 50|16

Showa Genuine Parts

Showa Genuine Parts Piston 50|16

Showa Genuine Motorcycle Suspension Parts
(SKU: R24005004)

$118.80
2 In Stock

Showa Genuine Parts Piston 50|18

Showa Genuine Parts

Showa Genuine Parts Piston 50|18

Showa Genuine Motorcycle Suspension Parts
(SKU: R24005005)

$145.20
1 In Stock

Showa Genuine Parts Piston 50|16

Showa Genuine Parts

Showa Genuine Parts Piston 50|16

Showa Genuine Motorcycle Suspension Parts
(SKU: R24005006)

$105.60
3 In Stock

Piston complete rcu 12x12x40

Kayaba (KYB) Genuine Motorcycle Parts

Piston complete rcu 12x12x40

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120204000301)

$179.47
Special Order

Piston complete rcu 44mm

Kayaba (KYB) Genuine Motorcycle Parts

Piston complete rcu 44mm

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120204400101)

$179.47
Coming Soon

Piston complete rcu 18x14x44

Kayaba (KYB) Genuine Motorcycle Parts

Piston complete rcu 18x14x44

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120204400301)

$179.47
Nil Stock

Kayaba (KYB) Genuine Parts RCU Shock Main Piston Complete - 50mm - LTR450 06 rear

Kayaba (KYB) Genuine Motorcycle Parts

Kayaba (KYB) Genuine Parts RCU Shock Main Piston Complete - 50mm - LTR450 06 rear

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120205000101)

$133.43
Special Order

Kayaba (KYB) Genuine Parts RCU Shock Main Piston Complete - 50mm - YZ250X 16+ GasGas 18+ - **Discontinued**

Kayaba (KYB) Genuine Motorcycle Parts

Kayaba (KYB) Genuine Parts RCU Shock Main Piston Complete - 50mm - YZ250X 16+ GasGas 18+ - Discontinued

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120205000501)

$198.00
Special Order

Piston complete rcu YZF450 '26-

Kayaba (KYB) Genuine Motorcycle Parts

Piston complete rcu YZF450 '26-

(SKU: 120205000601)

$163.15
Nil Stock

Teknik Shock Absorber Piston Bush with Piston 50x14.55x1.50 -Showa

Teknik Motorsport

Teknik Shock Absorber Piston Bush with Piston 50x14.55x1.50 -Showa

Super Low Friction
(SKU: LFPB-50145515)

$220.00
Nil Stock

Showa Piston - 40mm

Showa Genuine Parts

Showa Piston - 40mm

Showa Genuine Motorcycle Suspension Parts
(SKU: R24000005)

$133.44
Special Order

Showa Genuine Parts Piston 40|12

Showa Genuine Parts

Showa Genuine Parts Piston 40|12

Showa Genuine Motorcycle Suspension Parts
(SKU: R24004002)

$52.80
Special Order

Showa Genuine Parts Piston 50|16

Showa Genuine Parts

Showa Genuine Parts Piston 50|16

Showa Genuine Motorcycle Suspension Parts
(SKU: R24005007)

$132.00
Coming Soon

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