Skip to product information
NGK SPARK PLUG SILMAR8A9S 90992 31909-MJP-G51 HONDA
  • NGK SPARK PLUG SILMAR8A9S 90992 31909-MJP-G51 HONDA
  • NGK SPARK PLUG SILMAR8A9S 90992 31909-MJP-G51 HONDA
NGK SPARK PLUG SILMAR8A9S 90992 31909-MJP-G51 HONDA

NGK SPARK PLUG SILMAR8A9S 90992 31909-MJP-G51 HONDA

£26.04 GBP
Taxes included. Shipping calculated at checkout.

The NGK SILMAR8A9S Spark Plug (part number 90992) is a Laser Iridium plug engineered for high ignitability, longevity, and stable combustion. Designed with fine wire iridium and platinum elements, it offers superior resistance to wear and fouling, and supports efficient engine performance in a variety of Honda motorcycles and side-by-sides.

Features

  • Fine wire iridium center electrode and fine wire platinum ground electrode for slow wear rate and stable combustion

  • Trivalent metal plating for enhanced anti-corrosion and anti-seizing

  • Corrugated ribs prevent flashover

  • Pure alumina silicate ceramic insulator for strength and heat transfer

  • Copper core aids in heat removal

  • Triple seals prevent leakage

Specifications

  • Shell thread diameter: 10mm

  • Thread pitch: 1.0mm

  • Seat type: Gasket

  • Reach: 26.5mm (1.04")

  • Hex size: 9/16" (14mm)

  • Terminal type: Solid

  • Gap: .035" (0.9mm)

  • Center electrode material: Iridium

  • Center electrode type: Fine wire

  • Center electrode size: 0.6mm

  • Center electrode projection: Non-projected

Cross-Reference OEM Part Numbers

  • 31909-MJP-G51

Vehicle Fitments

  • 2024 Honda CRF1100L Africa Twin Base

  • 2024 Honda CRF1100L Africa Twin DCT Base

  • 2024 Honda CRF1100L4 Africa Twin Adventure Sports ES Base

  • 2024 Honda CRF1100L4 Africa Twin Adventure Sports ES DCT Base

  • 2024 Honda SXS10S2R Talon 1000R Base

  • 2024 Honda SXS10S2RD Talon 1000R FOX Live Valve Base

  • 2024 Honda SXS10S2X Talon 1000X Base

  • 2024 Honda SXS10S2XD Talon 1000X FOX Live Valve Base

  • 2024 Honda SXS10S4 Talon 1000X-4 Base

  • 2024 Honda SXS10S4 Talon 1000X-4 FOX Live Valve Base

  • 2024 Honda SXS10S4RD Talon 1000R-4 FOX Live Valve Base

  • 2023 Honda CMX1100 Rebel 1100 Base

  • 2023 Honda CMX1100 Rebel 1100 DCT Base

  • 2023 Honda SXS10S2R Talon 1000RS Base

  • 2023 Honda SXS10S2RD Talon 1000R FOX Live Valve Base

  • 2023 Honda SXS10S2RD Talon 1000RS FOX Live Valve Base

  • 2023 Honda SXS10S2X Talon 1000XS Base

  • 2023 Honda SXS10S2XD Talon 1000X FOX Live Valve Base

  • 2023 Honda SXS10S2XD Talon 1000XS FOX Live Valve Base

  • 2023 Honda SXS10S4 Talon 1000X-4 FOX Live Valve Base

  • 2023 Honda SXS10S4 Talon 1000XS-4 Base

  • 2023 Honda SXS10S4RD Talon 1000R-4 FOX Live Valve Base

  • 2023 Honda SXS10S4XD Talon 1000XS-4 FOX Live Valve Base

  • 2022 Honda CMX1100 Rebel 1100 Base

  • 2022 Honda CMX1100 Rebel 1100 DCT Base

  • 2022 Honda CRF1100L Africa Twin Base

  • 2022 Honda CRF1100L Africa Twin DCT Base

  • 2022 Honda CRF1100L4 Africa Twin Adventure Sports ES Base

  • 2022 Honda CRF1100L4 Africa Twin Adventure Sports ES DCT Base

  • 2022 Honda SXS10S2R Talon 1000R Base

  • 2022 Honda SXS10S2RD Talon 1000R FOX Live Valve Base

  • 2022 Honda SXS10S2X Talon 1000X Base

  • 2022 Honda SXS10S2XD Talon 1000X FOX Live Valve Base

  • 2022 Honda SXS10S4 Talon 1000X-4 Base

  • 2022 Honda SXS10S4 Talon 1000X-4 FOX Live Valve Base

  • 2021 Honda CMX1100 Rebel 1100 Base

  • 2021 Honda CMX1100 Rebel 1100 DCT Base

  • 2021 Honda CRF1100L Africa Twin Base

  • 2021 Honda CRF1100L Africa Twin DCT Base

  • 2021 Honda CRF1100L4 Africa Twin Adventure Sports ES Base

  • 2021 Honda CRF1100L4 Africa Twin Adventure Sports ES DCT Base

  • 2021 Honda SXS10S2R Talon 1000R Base

  • 2021 Honda SXS10S2R Talon 1000R Special Edition Base

  • 2021 Honda SXS10S2RD Talon 1000R FOX Live Valve Base

  • 2021 Honda SXS10S2X Talon 1000X Base

  • 2021 Honda SXS10S2XD Talon 1000X FOX Live Valve Base

  • 2021 Honda SXS10S4 Talon 1000X-4 Base

  • 2021 Honda SXS10S4 Talon 1000X-4 FOX Live Valve Base

  • 2021 Honda SXS10S4 Talon 1000X-4 Special Edition Base

  • 2020 Honda CRF1100L Africa Twin Base

  • 2020 Honda CRF1100L Africa Twin DCT Base

  • 2020 Honda CRF1100L4 Africa Twin Adventure Sports ES Base

  • 2020 Honda CRF1100L4 Africa Twin Adventure Sports ES DCT Base

  • 2020 Honda SXS10S2R Talon 1000R Base

  • 2020 Honda SXS10S2X Talon 1000X Base

  • 2020 Honda SXS10S4 Talon 1000X-4 Base

  • 2020 Honda SXS10S4 Talon 1000X-4 FOX Live Valve Base

  • 2019 Honda CRF1000L Africa Twin Base

  • 2019 Honda CRF1000L Africa Twin ABS Base

  • 2019 Honda CRF1000L Africa Twin DCT Base

  • 2019 Honda CRF1000L2 Africa Twin Adventure Sports Base

  • 2019 Honda CRF1000L2 Africa Twin Adventure Sports DCT Base

  • 2019 Honda SXS10S2R Talon 1000R Base

  • 2019 Honda SXS10S2X Talon 1000X Base

  • 2018 Honda CRF1000L Africa Twin Base

  • 2018 Honda CRF1000L Africa Twin ABS Base

  • 2018 Honda CRF1000L Africa Twin DCT Base

  • 2018 Honda CRF1000L2 Africa Twin Adventure Sports Base

  • 2018 Honda CRF1000L2 Africa Twin Adventure Sports DCT Base

  • 2017 Honda CRF1000L Africa Twin Base

  • 2017 Honda CRF1000L Africa Twin ABS Base

  • 2017 Honda CRF1000L Africa Twin DCT Base

  • 2016 Honda CRF1000L Africa Twin Base

  • 2016 Honda CRF1000L Africa Twin ABS Base

  • 2016 Honda CRF1000L Africa Twin DCT Base