Fire every power stroke reliably with the DENSO Auto Parts Spark Plug (P/N 4010). This spark plug drops in as a direct-fit replacement for the 1996-2006 Kawasaki EX250F Ninja 250R, the 2009 KTM 65 SX, and the 2009 KTM 65 XC. A spark plug delivers the high-voltage spark across its electrode gap that ignites the air-fuel mixture in the combustion chamber, so a fresh, correctly matched plug helps keep ignition consistent on the listed applications.
Core job: provides the spark that lights off the compressed air-fuel charge each cycle.
Direct-fit replacement: matched to the listed Kawasaki and KTM applications above.
Signs it may need replacing: hard starting, misfire, rough idle, or hesitation can be signs a worn or fouled plug should be replaced — diagnose the cause first, since these symptoms can have other sources.
Maintenance-friendly: a routine service item; replace at the interval in your vehicle's service information.
Interchange: U24FSR-U
This part cross-references / interchanges with the following part numbers:
U24FSR-U
Frequently Asked Questions
Which vehicles does spark plug 4010 fit?
It is a direct-fit replacement for the 1996-2006 Kawasaki EX250F Ninja 250R, the 2009 KTM 65 SX, and the 2009 KTM 65 XC. See the Buyer's Guide tab to confirm your application.
What does a spark plug do?
It delivers the high-voltage spark across its electrode gap that ignites the compressed air-fuel mixture in the combustion chamber on each power stroke.
What number does this plug interchange with?
It cross-references to U24FSR-U (also shown compact as U24FSRU). Its own manufacturer part number is 4010.
What are signs my spark plug needs replacing?
Hard starting, misfire, rough idle, or hesitation can indicate a worn or fouled plug. These symptoms can have other causes, so diagnose before replacing.
Is this a genuine OE part?
It is a DENSO Auto Parts spark plug offered as a direct-fit replacement for the listed applications. Replace at the interval in your vehicle's service information.
Spark Plug StandardPatented U-Groove technology on the ground electrode allows for a larger flame front and improved ignitability. Copper core center electrode for superior thermal conductivity...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
