Yamaha Retainer Spring – 6S5-R2358-00-00

A healthy valve train starts with parts you can trust. This little “top‑hat” retainer sits atop every valve spring in Yamaha’s 1.8‑liter HO and SVHO engines, keeping each coil centered and secure as the tach sweeps past 7,000 rpm. Yamaha machines it from heat‑treated chromoly steel, then applies a dark phosphate finish that laughs off hot oil, acid fumes, and the stray salt spray that sneaks under the cover.

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Key Features & Benefits

• OEM‑perfect fit – precision‑cut to lock onto factory keepers with zero lapping or shims
• Lightweight profile – trims valve‑train mass to protect cam lobes during long wide‑open runs
• Corrosion armor – phosphate coating resists rust far longer than bare‑metal aftermarket copies
• Wide compatibility – direct replacement for late‑model 1.8 L WaveRunner GP/FX, Yamaha jet‑boat engines, and F‑series outboards sharing the block

Swap out any pitted or worn retainers during your winter tear‑down and you’ll head into next season with rock‑solid spring tension, steadier idle, and snappier throttle response. It’s a small piece that safeguards pistons, valves, and every hard‑earned weekend on the water.

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Fits These Yamaha Models

Yamaha Model	Compatible Years
FB1800 WaveRunner FX HO	2018-2021
FB1800A WaveRunner FX Cruiser HO	2018-2019, 2021
FC1800 WaveRunner FX SVHO	2018-2021
FC1800A WaveRunner FX Cruiser SVHO	2018-2019, 2021
FC1800B WaveRunner FX Limited SVHO	2018-2021
FX1800 WaveRunner FX SVHO	2024
FX1800A WaveRunner FX Cruiser SVHO	2024
FX1800B WaveRunner FX Limited SVHO	2024
FX1900 WaveRunner FX Cruiser HO	2024
GP1800	2018
GP1800 GP SVHO	2024
GP1800R HO	2021
GP1800R SVHO	2021
VX1050A WaveRunner VX Cruiser	2019-2021, 2024
VX1050B WaveRunner VX Deluxe	2024
VX1050C WaveRunner VX	2019-2021, 2024
VX1050F WaveRunner VX Limited	2019-2021, 2024
VX1800 WaveRunner VX Cruiser HO	2019-2020
VX1800 WaveRunner VX Limited HO	2021
VX1800AK WaveRunner VXR	2018-2019

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Frequently Asked Questions

What is Yamaha part 6S5-R2358-00-00?

6S5-R2358-00-00 is the genuine Yamaha Retainer Spring, designed for the compatible Yamaha applications shown above.

Which Yamaha models fit 6S5-R2358-00-00?

This part fits FB1800 WaveRunner FX HO, FB1800A WaveRunner FX Cruiser HO, FC1800 WaveRunner FX SVHO, and other listed Yamaha models. Review the compatibility table above for the complete model and year listing, and confirm your exact application before ordering.

Is 6S5-R2358-00-00 a genuine Yamaha part?

Yes. This listing is for a genuine Yamaha OEM part or accessory identified by Yamaha part number 6S5-R2358-00-00.

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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.