NGK Racing Spark Plug R0409B-9 for HONDA CRF 150, CRF 250 2005-2027

NGK offers this spark plug for HONDA CRF 150, CRF 250 2005-2027. On every turn (two-stroke) or every other turn (four-stroke), the ignition sends a high voltage to the plug: a spark jumps between its electrodes and ignites the mixture in the cylinder.

Why replace the spark plug?

The benefits:

• A new plug gives a strong spark: easier starting, a smoother engine, fewer misfires.
• An inexpensive part that is quick to change: it is one of the first things to check when the engine starts or runs badly.
• Iridium version: a steadier spark and a longer life than a standard plug.

Why choose NGK?

NGK, the Japanese manufacturer founded in 1936 with roots in the ceramics industry, is the leading original-equipment spark plug supplier; its plug caps contain a ceramic resistor that suppresses interference without affecting how the engine runs.

When should you replace this part?

Rounded or eroded electrodes, black or oily deposits, a cracked insulator, hard starting or misfires under acceleration: replace the plug.

Specifications and fitting tips

• Sparkplug type: Racing
• Use: Racing
• Connection Type: Threaded Terminal Stud
• Repeated acceleration and deceleration with power
• Intensive engine operating on high rev.
• Manufacturer part number: 7792

Cross-Mania tip: Screw it in by hand first on a clean thread, tighten it to the torque or angle given by the manufacturer and push the plug cap fully home until it clicks.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
HONDA CRF 150 2027
HONDA CRF 150 2026
HONDA CRF 150 2025
HONDA CRF 150 2024
HONDA CRF 150 2010
HONDA CRF 150 2009
HONDA CRF 150 2008
HONDA CRF 250 2009
HONDA CRF 250 2008
HONDA CRF 250 2007
HONDA CRF 250 2006
HONDA CRF 250 2005