Steahly Offroad - Flywheel Weight for KTM 85-105 SX/XC 2003-2017Adds 7 ounces over stock. This easy mod will make it much easier to control the power of the 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 will make it even easier. SKU: SO E 3 Note: SXS models will require the SX ignition