DENSO Auto Parts Spark Plug P/N:5373
DENSO Auto Parts 3073 spark plug for the 1997 KTM 50 SXR Pro JR and other vehicles ignites the air-fuel mixture in the cylinder. Its U-Groove design is intended to support engine efficiency, and the spark plug is OE-grade.
Hard starting, a rough idle or a misfire can mean the spark plugs are worn. These signs alone do not prove the spark plug is the problem, since an air leak or a fuel delivery fault can also produce them.
The 3073 is a direct-fit replacement for the 1997 KTM 50 SXR Pro SR, the 1981-1982 Yamaha LB50 and a wide range of other vehicles and equipment; quantity depends on the engine, and the 1997 KTM 50 SXR Pro JR takes one. If your own model is not named here, look it up in the "Vehicles it fits" section.
Fit and size
Build and materials
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
Will the DENSO Auto Parts 3073 fit the 1981-1982 Yamaha LB50?
Yes. The DENSO Auto Parts 3073 is listed for the 1981-1982 Yamaha LB50. If your model is not named here, look it up in the "Vehicles it fits" section on this page.
What does the U-Groove do on this DENSO Auto Parts spark plug?
The patented U-Groove on the ground electrode allows a larger flame front and improved ignitability. It is intended to support engine efficiency.
What are the thread size and reach of the DENSO 3073 spark plug?
The DENSO Auto Parts 3073 has a 14.0 mm thread diameter, a 12.7 mm reach, a flat seat and a 20.6 mm hex.
What are the electrodes on this spark plug made of?
The center electrode has a copper core with a nickel tip, and the ground electrode has a nickel core.
Does this spark plug come pre-gapped?
Yes. This spark plug has a pre-gap size of 0.7 mm.
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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.