Description
The NGK 4549 CR7HSA is a reliable OE-style nickel spark plug designed for small-displacement motorcycles, dirt bikes, and powersports engines. Built with NGK’s trusted “yellow box” construction, it delivers consistent ignition, smooth operation, and dependable starting performance.
Featuring a copper core for efficient heat dissipation and a durable nickel center electrode, this plug is ideal for engines that require standard nickel plugs. Its compact design and proper heat range make it especially well-suited for smaller engines used in off-road and recreational applications.
Key Features
- OE-equivalent nickel center electrode for reliable ignition
- 98% pure copper core for excellent heat transfer
- 5k Ohm resistor reduces electrical interference
- Trivalent metal plating for corrosion resistance and anti-seize
- Triple gasket sealing prevents combustion gas leakage
- Compact design ideal for small engines and powersports
- Proven durability for off-road and recreational use
Specifications
General
- Part Number: CR7HSA
- Stock Number: 4549
- Heat Range: 7
- Resistor: Yes (5k Ohm)
- Gap: 0.7 mm
Shell
- Thread Size: M10 x 1.0
- Seat Type: Flat (Gasket)
- Reach: 12.7 mm
- Hex Size: 5/8" (16 mm)
- Terminal: Stud
Electrodes
- Center Electrode: Nickel with copper core
- Ground Electrode: Nickel
- Configuration: J-Gap
- Projection: Non-projected
Fitment Highlights
Honda
- CRF80F / CRF100F (2004–2011)
- NSF100 (2006)
- XR80 / XR80R (1982–2003)
Kawasaki
- KLX140 / KLX140L / KLX140G (2008–2024)
- KLX140R series (2021–2024)
Suzuki
- DR-Z50 (2019–2024)
- DR-Z70 (2008–2018)
Yamaha
- TTR125 / TTR125E / TTR125L / TTR125LE (2000–2019)
- TTR50E (2006–2019)
Performance Notes
- Heat range 7 offers a balanced operating temperature for small engines
- Ideal for trail bikes, pit bikes, and recreational off-road use
- Designed for engines requiring standard nickel plugs, not platinum/iridium upgrades
- Reliable choice for consistent starts and smooth idle in smaller displacement engines
