Our Yamaha 2-Stroke Pro-Packs contain factory style hardware including all bodywork fasteners and aluminum bushings, rotor bolts, a full set of sprocket bolts, chain adjuster bolts, t-nuts, carb screws, Fuji lock nuts, thread chasers and drain plug washers. Also includes expansion chamber o-rings, pipe to muffler coupler, & pipe springs with a custom assortment of hardware specialized for 2-stroke models.