BETA presents their power valve adjuster for RR 125/200/250/300 and XTrainer 250/300.

This accessory allows the adjustment of the power valve spring preload of the engine, on the RR and XTrainer,  of all model years without the need to use any tools.

The preload adjustment allows you to modify the power curve delivered by the engine, enabling you to customize it according to your personal tastes and to the needs that the terrain / conditions require.