NGK BR9ECMIX 2707 Iridium IX Spark Plug KTM 85/125/150SX Husqvarna Aprilia

Vehicle Fitment

• 1996-2002 Aprilia RS 250 (Base, 2-stroke)
• 2012-2013 Husaberg TE 125 (Base, 2-stroke)
• 2016 Husqvarna TE 125 (Base, 2-stroke)
• 2019 Husqvarna TE 150 (Base, 2-stroke)
• 2020 Husqvarna TC 85 17/14 (Base, 2-stroke)
• 2020 Husqvarna TC 85 19/16 (Base, 2-stroke)
• 2008-2011 KTM 105 SX (Base, 2-stroke)
• 2008-2010 KTM 105 XC (Base, 2-stroke)
• 2008-2019 KTM 125 SX (Base, 2-stroke)
• 2008 KTM 144 SX (Base, 2-stroke)
• 2009-2019 KTM 150 SX (Base, 2-stroke)
• 2010-2014 KTM 150 XC (Base, 2-stroke)
• 2017-2019 KTM 150 XC-W (Base, 2-stroke)
• 2009-2019 KTM 85 SX 17/14 (Base, 2-stroke)
• 2009-2010 KTM 85 SX 19/16 (Base, 2-stroke)
• 2013 KTM 85 SX 19/16 (Base, 2-stroke)
• 2012-2013 KTM 85 SXS 17/14 (Base, 2-stroke)
• 2009 KTM 85 XC (Base, 2-stroke)
• 2018-2020 Yamaha YZ65 (Base, 2-stroke)

Fitment Notes

• Designed for 2-stroke performance and motocross/enduro engines only; not compatible with 4-stroke applications.
• KTM 85 SX wheel size variants (17/14 and 19/16) are listed as separate fitment entries due to differing model codes.
• Husaberg TE125 (2012-2013) and Husqvarna TE125 (2016) are distinct legacy platforms; both confirmed fitments.
• Sold individually (1x plug per unit); confirm cylinder count before ordering for multi-cylinder applications.

Features

• Fine wire 0.6mm iridium tip center electrode delivers a consistently stable and powerful spark for improved combustion efficiency.
• Iridium alloy offers an extremely high melting point, providing 6x the hardness of platinum for extended service life.
• Tapered cut ground electrode minimizes electrical quenching and enhances throttle response and idle stability.
• Trivalent metal plating on the shell provides superior anti-corrosion and anti-seizing properties for easier removal.
• Pure alumina silicate ceramic insulator delivers better strength, heat transfer, and resistance to flashover.
• Triple gasket seal design prevents combustion gas leakage and ensures airtight installation.
• Corrugated insulator ribs prevent electrical flashover under demanding high-RPM conditions.
• 98% pure copper core enhances heat dissipation, keeping operating temperatures stable across a wide rev range.

Specifications

• NGK Part Number: BR9ECMIX
• NGK Stock Number: 2707
• Plug Type: Iridium IX
• Thread Diameter: 14mm
• Thread Pitch: 1.25mm
• Seat Type: Gasket
• Thread Reach: 19mm (3/4")
• Hex Size: 13/16" (21mm)
• Terminal Type: Solid
• Pre-Set Gap: 0.031" (0.8mm)
• Center Electrode Material: Iridium Alloy
• Torque Spec (Cast Iron Head): 18-25.3 lb-ft
• Torque Spec (Aluminum Head): 18-21.6 lb-ft

Included Components

• 1x NGK BR9ECMIX Iridium IX Spark Plug (pre-gapped at 0.031" / 0.8mm)

Product Description

The NGK BR9ECMIX (Stock No. 2707) is an Iridium IX spark plug engineered specifically for high-performance 2-stroke motocross and enduro engines. Designed for the performance enthusiast, it features a 0.6mm fine wire iridium tip center electrode that delivers a precise, stable spark with reduced voltage requirements - improving throttle response, ignitability, and overall power delivery. The tapered cut ground electrode reduces quenching effect, making it especially effective in the high-RPM demands of dirt bikes and competition machines.

This plug is purpose-built for a wide range of 2-stroke applications spanning Aprilia, Husaberg, Husqvarna, KTM, and Yamaha, including the popular KTM 85 SX, 125 SX, and 150 SX platforms across multiple model years. Its 14mm thread, 19mm reach, and gasket seat type match the cylinder head specifications of these engines directly. Installation is straightforward - no gapping required out of the box - and the trivalent shell plating ensures the plug won't seize in aluminum or cast iron heads over time, making future removal clean and damage-free.