XTrig Pre-Load Adjuster Yamaha Yz450F The XTrig Pre-Load Adjuster makes changing pre-load settings quick and easy by replacing both pre-load rings on your shock. In place of the rings is a mechanical device that uses the shock bodys threads to move an adjuster up and down. Features: Makes race sag adjustments quick and easy Mechanical drive transmission for smooth, precise adjustments Utilizes the entire thread length of the shock absorber Lightweight construction Note: Images are for reference only, actual adjuster will vary per make and model.