Aprilia RS 125: Power Valve (RAVE) Buying & Troubleshooting Guide
This post addresses the common dilemma of replacing or upgrading the exhaust power valve (PV) system for the Rotax 122 and 123 engines.
Buying Advice: The author warns against "cheap" unbranded power valve blades found on auction sites. These are often made of inferior alloys that can heat-cycle poorly, warp, or even snap, dropping metal into the cylinder.
OEM vs. Aftermarket: Genuine Aprilia/Rotax blades or high-quality CNC-machined alternatives (like those from reputable tuning houses) are recommended to ensure the "scoop" profile matches the piston curvature perfectly.
The "Blanking Plate" Alternative: For those on a budget or seeking ultimate reliability at the cost of low-end torque, the post mentions the "blank" plate. This locks the valve in the "open" position, giving full top-end power but making the bike very "boggy" and difficult to ride below 8,000 RPM.
The Solenoid & Cable: Often, "power valve failure" is actually a snapped cable or a burnt-out solenoid. The post suggests testing the solenoid with a 12V battery; if it doesn't "click" and pull, the electrical coil inside has failed.
OK then to start with see our Tanks removal posts and our Battery removal posts to get down to see the PV servo .
Buy Aprilia RS 125 Power Rave valve parts from Ebay UK here
Here are some other posts that might interest you .
Aprilia RS125 rave valve removal and refitting powervalve video , rs 125
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