Motorcycle Shock Reservoir Hose Union Seals

Reservoir Hose Union Seals

Some motorbikes lack space for a piggyback canister on the shock body but still use a separate remote reservoir and hydraulic hose to gain extra oil capacity and a nitrogen bladder. These reservoir hose connection joints require reliable union seals — aluminium alloy or copper flat washers and Bonoco (Dowdy) Sealing Washers with a rubber lip — to resist high oil pressure and prevent leaks during racing or road use. See our guidance on different shock styles and options in Shock Upgrade Parts or browse adjustable replacements like our rebound, slow & fast compression shocks.

Sealing remote reservoir unions for reliability and performance

• Prevent high-pressure oil leaks at hose unions
• Maintain consistent damping by protecting the nitrogen bladder and oil volume
• Suitable for aftermarket remote canisters and rare OEM dampers
• Essential when rebuilding coilovers or shipping suspension — avoid separated seals that leak

Recommended Pairings

Consider matching seals with our Suspension Tools for correct installation and torque control.

Shop Reservoir Hose Union Seals

Browse union seals and associated parts to keep your remote reservoir shocks sealed and race-ready; see our FAQ on shipping suspensions before sending units to a workshop.