Steahly Offroad - Flywheel Weight for KTM 85-105SX & XC 2003-2017Adds 7 ounces over stock. This easy mod will make it much easier to control the hard hitting power of the little KTM. Most woods and trail riders will benefit. All beginner and timid riders will do better because the smoother power and reduced stalling will lessen frustration and fatigue. Quick and easy installation, without any drilling, grinding, or welding. The engine lock up tool (E 3) will make it even easier. Note: SXS models will require the SX