NGK 3981 BR9EIX Iridium IX Spark Plug
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NGK 3981 BR9EIX Iridium IX Spark Plug. A spark plug for ignition-system maintenance. Listed applications include Aprilia RS 50, Arctic Cat Cheetah 500 F/C, Arctic Cat Cheetah Touring. See the table below for exact years and model variants.
Features & Specifications
- Fine-wire iridium center electrode for superior ignition efficiency.
- Removable terminal nut for flexible fitment options.
- Resists fouling, corrosion, and carbon buildup.
- Enhanced throttle response and cold starting.
Product Details
- Brand: NGK
- Manufacturer Part Number: 3981
Vehicle Fitment
| Year | Make | Model |
|---|---|---|
| 2002-2005 | Aprilia | RS 50 |
| 1986-1988 | Arctic Cat | Cheetah 500 F/C |
| 1990 | Arctic Cat | Cheetah Touring |
| 1985-1990 | Arctic Cat | Cougar |
| 1989-1990 | Arctic Cat | Cougar Mountain Cat |
| 1987-1988 | Arctic Cat | El Tigre 5000 |
| 1987-1988 | Arctic Cat | Jag 440 |
| 1989-1990 | Arctic Cat | Jag AFS |
| 1992-1993 | Arctic Cat | Lynx Mountain Cat |
| 1979-1981, 1985-1991 | Arctic Cat | Pantera |
| 1978 | Arctic Cat | Pantera 5000 F/A |
| 1978 | Arctic Cat | Pantera 5000 F/C |
| 1979-1981, 1984-1990 | Arctic Cat | Panther |
| 1977-1978 | Arctic Cat | Panther 4000 |
| 1990 | Arctic Cat | Panther Mountain Cat |
| 1997 | Arctic Cat | Powder Extreme |
| 1994-1997 | Arctic Cat | Puma |
| 1994-1997 | Arctic Cat | Puma 2-Up |
| 1994-1996 | Arctic Cat | Puma Deluxe |
| 1987-1990 | Arctic Cat | Super Jag |
| 1980-1981 | Arctic Cat | Trail Cat 400 |
| 1990 | Arctic Cat | Wildcat 650 |
| 1990 | Arctic Cat | Wildcat Mountain Cat |
| 1977-1979 | Bultaco | Pursang 250 |
| 1977 | Can-Am | 175 MX-3 |
| 1998-1999 | Cobra | KING |
| 2001 | Gas Gas | EC Rookie 50 |
| 1984-1986 | Honda | ATC250R |
| 1999-2007 | Honda | CR125R |
| 1973-1976 | Honda | CR250M |
| 1978-1981, 1987-1988 | Honda | CR250R |
| 1983-1984 | Honda | CR60R |
| 1980-1985 | Honda | CR80R |
| 1982-1984 | Honda | FL250 Odyssey |
| 2004 | Honda | NSR50 |
| 1987-1988 | Honda | TRX250R |
| 1998-2006, 2009-2010, 2012 | Husqvarna | CR125 |
| 2010 | Husqvarna | SM 125 |
| 1998-2006, 2009-2012 | Husqvarna | WR125 |
| 2010 | Husqvarna | WRE 125 |
| 1992-1993, 1996 | Husqvarna | WXC 250 |
| 1994-1996 | Husqvarna | WXE 250 |
| 1981-1982 | John Deere | Liquifire 440 |
| 1981-1982 | John Deere | Sportfire |
| 1981-1982 | John Deere | Trailfire 440 |
| 2007 | KTM | 105 SX |
| 1993 | KTM | 125 EXC |
| 1997-1998 | KTM | 125 Sting |
| 2003-2004 | KTM | 200 SX |
| 1990-1995 | KTM | 250 EXC |
| 1984-1988 | KTM | 250 MXC |
| 1992-1995 | KTM | 250 SX |
| 1990-1992 | KTM | 300 DXC |
| 1990-1995 | KTM | 300 EXC |
| 1990, 1993-1994 | KTM | 300 MXC |
| 1992 | KTM | 300 SX |
| 1989-1990 | KTM | 350 EXC |
| 1985-1988 | KTM | 350 MXC |
| 1985-1986 | KTM | 500 MXC |
| 1993-1994 | KTM | 550 MXC |
| 2007 | KTM | 85 SX (17/14) |
| 2007 | KTM | 85 SX (19/16) |
| 2008 | KTM | 85 XC |
| 1980-1982 | Kawasaki | KDX175 |
| 1983-1996 | Kawasaki | KDX200 |
| 1984, 1991-1994 | Kawasaki | KDX250 |
| 1984 | Kawasaki | KDX80 |
| 1982 | Kawasaki | KE125 |
| 1974-1976, 1978-1982, 1994-2002 | Kawasaki | KX125 |
| 1974-1976, 1978-1982, 1986-1987, 1989-1991 | Kawasaki | KX250 |
| 1975-1976 | Kawasaki | KX400 |
| 1980-1981 | Kawasaki | KX420 |
| 1983-1984 | Kawasaki | KX500 |
| 1983-2001 | Kawasaki | KX60 |
| 1980-1991 | Kawasaki | KX80 |
| 1987-1991 | Kawasaki | KX80 Big Wheel |
| 1983-1985 | Kawasaki | ZX750 GPZ |
| 1984-1985 | Kawasaki | ZX750E Turbo |
| 2007 | Piaggio | Typhoon |
| 2006 | Polini | X1R |
| 1976-1977 | Suzuki | GT250 |
| 1985-1992 | Suzuki | LT250R QuadRacer |
| 1978 | Suzuki | PE175 |
| 1980 | Suzuki | PE250 |
| 1980-1981 | Suzuki | PE400 |
| 1976-1981 | Suzuki | RM100 |
| 1975-1980, 1982-1995 | Suzuki | RM125 |
| 1976-1981 | Suzuki | RM250 |
| 1976-1977 | Suzuki | RM370 |
| 1982 | Suzuki | RM465 |
| 2003 | Suzuki | RM60 |
| 1982, 1984-1985 | Suzuki | RM80 |
| 1993-1998 | Suzuki | RMX250 |
| 1981 | Suzuki | RS250 |
| 1995-2000 | TM | 250E |
| 2009 | TM | EN125 |
| 2009 | TM | EN144 |
| 1996-2003, 2009 | TM | MX125 |
| 2009 | TM | MX144 |
| 2001-2003 | TM | MX250 |
| 1998-2003 | TM | MX300 |
| 2009 | TM | MX85 (17/14) |
| 2009 | TM | MX85 (19/16) |
| 2001 | Vespa | ET2 |
| 1980-1981 | Yamaha | DT175 |
| 1974 | Yamaha | DT360 |
| 1975-1976 | Yamaha | DT400 |
| 1976-1981 | Yamaha | EX440 |
| 1980-1981 | Yamaha | IT125 |
| 1979-1983 | Yamaha | IT175 |
| 1984-1985 | Yamaha | IT200 |
| 1977-1983 | Yamaha | IT250 |
| 1974-1976 | Yamaha | MX125 |
| 1975 | Yamaha | MX400 |
| 1972-1973 | Yamaha | RT2 |
| 1973 | Yamaha | RT3 |
| 1976, 1978-1980 | Yamaha | SRX440 |
| 1976 | Yamaha | TY175 |
| 1992 | Yamaha | WR200 |
| 1982 | Yamaha | YZ100 |
| 1974-1976, 1982-2017 | Yamaha | YZ125 |
| 1974-1982, 1984-1987 | Yamaha | YZ250 |
| 1980 | Yamaha | YZ50 |
| 1981-1983 | Yamaha | YZ60 |
| 1982-1983 | Yamaha | YZ80 |
Once your Steel Steeds gear leaves our warehouse, it typically arrives at your doorstep within 2–4 business days, unless otherwise noted. We partner with trusted shipping carriers to ensure your off-road essentials get to you fast and hassle-free. So gear up with confidence—your next big adventure is just around the corner!
Changed your mind? No problem. Most new, unused, and uninstalled items can be returned within 30 days of delivery.
We do not charge a standard restocking fee. Customers are responsible for return shipping unless the item arrived damaged, defective, or incorrect.
Items must be returned in original packaging and in resalable condition.
We are committed to providing quality products and stand behind our items with a warranty. Exact coverage may vary, so please refer to our warranty page for more details!
