Chassis and Spark Arrestor/Muffler Chassis Check for loose parts. Nuts and bolts may shake loose as you ride over rough terrain. Shake handlebars, footrests, and other key parts to make sure they’re secure. Periodically tighten all major fasteners. Spark Arrestor/Muffler Be sure the spark arrestor/muffler works properly. Try to wiggle the muffler to make sure it’s attached securely. Consult your owner’s manual for maintenance information.