Denso U-Groove Spark Plug – U27FER9

The Denso U-Groove Spark Plug – U27FER9 is a Denso motorcycle part or accessory for the application identified below. The confirmed fitment, construction, package and product reference details are gathered here to help prevent an incorrect purchase.

Before ordering, compare the exact part reference, dimensions, motorcycle model and model year with the component being replaced or upgraded.

• Denso’s U-Groove technology puts a distinctive groove in the ground electrode to help the flame kernel grow more freely
• The U27FER9 is a direct replacement wherever this Denso code is specified
• U-Groove ground electrode design for improved flame propagation and easier starting
• Nickel-alloy electrode construction for durable everyday service
• Resistor type to limit electrical interference with onboard electronics
• Denso heat range 27 a colder plug for harder-working engines
• Note that Denso and NGK heat-range numbers run in opposite directions, so always cross-reference carefully
• Check your manual for the correct plug and gap before installation