NGK Racing Spark Plug Box of 4 (BR10EG SOLID) NGK NGK3993
NGK Racing Spark Plug Box of 4 (BR10EG SOLID) NGK NGK3993
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NGK Racing Spark Plug Box of 4 (BR10EG SOLID)

NGK
NGK3993
87295139936
Spark Plugs
20+ Units In Stock - Ships Next Business Day
Engine, Ignition, NGK, Spark Plugs
$ 67.88
$ 67.88

SKU: 3993 | UPC: 87295139936

NGK Racing Spark Plug Box of 4 (BR10EG SOLID) for 1974-2007 Honda CR Kawasaki KX Yamaha YZ

NGK BR10EG racing spark plugs deliver reliable ignition in tough 2-stroke motocross conditions. This box of 4 fits Honda CR125R (1979-2007) CR250R (1978-2007) Kawasaki KX125 (1974-2005) KX250 (1974-1976 1978-2007) and Yamaha YZ80 YZ85 models. Special electrode designs ensure consistent performance under high heat and stress in MPN 3993 plugs.

Key Features

  • Cold Heat Range 10: Handles extreme racing temperatures in 2-stroke engines for sustained power output
  • Solid Copper Center Electrode: Provides maximum conductivity and durability without resistor interference
  • V-Grooved Ground Electrode: Improves flame kernel growth for better ignitability and combustion efficiency
  • 14mm Thread x 19mm Reach: Precise fit for high-compression motocross heads with 16mm hex for easy installation
  • Projected Insulator: Resists fouling and carbon buildup in grueling track sessions

Product Notes

  • Factory gap 0.032 inches verify and adjust for engine tune
  • Use anti-seize on threads during install to prevent seizing
  • Ships in protective NGK box for secure handling

Installation Notes

  • Professional installation recommended.
  • Torque to 12-18 ft/lbs depending on cylinder head material
  • Compatible with stock and aftermarket heads no special hardware needed

This Part Fits

Year Make Model Submodel
1979-2007 Honda CR125R Base
1978-2007 Honda CR250R Base
1986-2002 Honda CR80R Base
2003-2007 Honda CR85R Base
2003-2006 Honda CR85RB Expert Base
1974-2005 Kawasaki KX125 Base
1974-1976 Kawasaki KX250 Base
1978-2007 Kawasaki KX250 Base
1984-2001 Yamaha YZ80 Base
2002-2004 Yamaha YZ85 Base

Why Choose NGK?

  • Trusted in every major racing series worldwide for decades
  • Backed by engineering that powers professional motocross teams
  • Consistent quality from pure materials and exact tolerances

Frequently Asked Questions

  • Q: Will this fit my 1995 Honda CR250R?
    A: Yes BR10EG (3993) is direct fit for 1978-2007 Honda CR250R Base with 14mm x 19mm specs matching OEM requirements
  • Q: What material is the electrode?
    A: Solid copper center electrode with nickel alloy tip for high conductivity and resistance to extreme heat
  • Q: Is there a warranty on these plugs?
    A: NGK offers manufacturer defect coverage inspect for damage upon receipt and retain packaging

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Original NGK retail box 4" x 3" x 1.5"
  • Weight: 0.4 lbs

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