RIVA Yamaha 1.8/1.9L Valve Retainer Upgrade Kit

RIVA Racing Valve Retainer Upgrade Kit

Yamaha 1.8L / 1.9L Engines
SKU: RY19040-SRU

One off price as the customer supplied the kit but we ended up fitting the complete valve kit by Riva so new and unused in original packaging

When Yamaha engines are pushed hard, valve control matters. This RIVA Racing Valve Retainer Upgrade Kit is designed to improve reliability at higher RPM by reducing the risk of valve float — a known weak point on hard-ridden or race-prepped engines.

The kit includes 16 lightweight titanium valve retainers, precision machined for strength and consistency. Compared to standard retainers, these reduce mass in the valvetrain, helping the valves stay under control when revs climb.

This upgrade is widely used in IJSBA and APBA Stock Class race craft, but it’s just as relevant for fast recreational skis that see sustained high RPM use.

Key Features

• Improves valve control at high engine speeds

• Reduces likelihood of valve float

• 16 precision-machined titanium valve retainers included

• Direct replacement for OEM retainers

• Proven RIVA Racing performance and build quality

Recommended

For highly modified or big-power engines, RIVA recommend stepping up to the complete Valve Train Upgrade Kit (RY19040-VTU-2).

Suggested Tool

• RIVA Valve Compression Tool – RY19040-VCT-1

Fitment

Fits Yamaha 1.8L and 1.9L engines including FX, GP, FZR, FZS, VXR and VXS models from 2008 to 2026 (HO, SHO and SVHO variants).