This high-voltage ignition coil is compatible with Yamaha XT660Z/X/X-Tenere and other models and has the original part number 33410-91L10. Replacing it will improve ignition performance.

【Precise Replacement to Original Specifications】 This product is a high-voltage ignition coil specifically designed for original part number 33410-91L10. Manufactured to exact electrical parameters, mounting connections, and original Yamaha performance standards, it ensures perfect compatibility with the CDI/ECU and spark plugs of the specified model. It is a direct and reliable solution for resolving ignition problems and replacing worn or damaged original parts.

【High-Efficiency Power Converter】 The high-voltage coil is a crucial component of the ignition system. It converts the low-voltage pulses (typically 12V) from the ignition unit (CDI or ECU) into high voltage in the range of several thousand to tens of thousands of volts.

This generates a powerful electrical spark across the spark plug, reliably igniting the fuel-air mixture in the cylinder. Robust and durable construction. Internal Coil: Precision wound from high-purity, enamelled copper wire for excellent insulation, high energy conversion efficiency, exceptional heat resistance, and long service life. External Insulation: The outer casing is made of reinforced, heat- and oil-resistant plastic. The high-voltage output is insulated with heavy-duty rubber or silicone to effectively prevent voltage drop and arcing, thus withstanding the harsh conditions in the engine compartment. Precise Interface: The low-voltage input connector is fully compatible with the vehicle's original wiring harness; the high-voltage output interface fits perfectly onto the spark plug connector or high-voltage cable, ensuring a reliable connection and lossless power transmission. 【Fixes Common Ignition Problems】 Replacing this component effectively fixes various engine problems caused by a deteriorating high-voltage coil: difficulty starting in cold weather or frequent stalling after starting; rough idling, strong vibrations, jerking during acceleration, and loss of power. Lack of power at high RPMs, delayed throttle response. Weak, unusually discolored, or absent spark when checking the spark plugs; increased fuel consumption. 【Easy Installation】 Usually located near the cylinder head. To install, first disconnect the negative battery terminal, disconnect the low-voltage connector, remove the mounting screws, insert and secure the new high-voltage transformer, and then connect the high-voltage cable to the low-voltage connector. Key compatibility information (based on part number 33410-91L10): Original Equipment (OE) part number: 33410-91L10. Key compatible models (Yamaha): XT660Z Ténéré (various years), XT660X (various years), XT660R (various years). May be compatible with other Yamaha models using the same part number.