

The DENSO IWM27 Iridium Power is a high-quality iridium spark plug designed for motorcycles such as Honda NSR250 (1988–1996), Yamaha TZ250R (1989–1995), and Suzuki RGV250 Gamma (1988–1998), as well as some high-performance cars. It is suitable for 2-stroke engines with a displacement of around 250 ccm, providing excellent ignition thanks to a 0.4 mm iridium tip and a special U-shaped ground electrode. This spark plug is also ideal for water-cooled kart engines and certain Aprilia, Kawasaki, and KTM models. Manufactured to strict DENSO standards, with iridium capable of withstanding temperatures above 2450 °C, it delivers top-tier performance, improved acceleration, and a long lifespan, even in extreme conditions. Check compatibility with your vehicle or motorcycle in the table below. For comprehensive maintenance, explore our spark plugs at Car Parts Herkules!
Brand | Model | Engine Type | ccm | kW |
---|---|---|---|---|
Aprilia | RS250 (1995–2002) | 2-stroke V2 | 249 | 40 |
Honda | NSR250R (1988–1996) | 2-stroke V2 | 249 | 45 |
Honda | CR250R (1985–1990) | 2-stroke | 248 | 37 |
Kawasaki | KR-1S (1989–1992) | 2-stroke Inline-2 | 249 | 44 |
KTM | 250 EXC (1999–2005) | 2-stroke | 249 | 36 |
Suzuki | RGV250 Gamma (1988–1998) | 2-stroke V2 | 249 | 45 |
Suzuki | RM250 (1985–1990) | 2-stroke | 249 | 38 |
Yamaha | TZ250R (1989–1995) | 2-stroke V2 | 249 | 48 |
Yamaha | RD350LC (1980–1986) | 2-stroke Inline-2 | 347 | 35 |
Yamaha | YZ250 (1985–1990) | 2-stroke | 249 | 39 |
Specifications: Iridium spark plug, thread diameter: 14 mm, thread length: 12.7 mm, electrode gap: 0.8 mm, heat range: 27 (cold), resistance: 5 kΩ.
Manufacturer Part Numbers: DENSO IWM27 (5392), NGK BR9EIX, Bosch WR3CC.
OEM Numbers: Honda: 98079-59647; Yamaha: 94701-00254; Suzuki: 09482-00472.
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