Race Prep With Valve Adjust "Full Dirt Bike Service with Valve adjust" 150.00 Plus Parts. This 4 Stroke Dirt Bike service includes, Oil and Oil Filter change, Air filter clean and air box cleaning, Chain cleaning adjust and lube, Set tire presure, check coolent level, check brake pads, lubbe cables and pivot points, change spark plug if needed, check spokes and condition of wheels and tires, bolt check, Visual Inspection of bike condition, and wash