NGK DPR8EIX-9equivalent & cross reference

The NGK DPR8EIX-9 spark plug is directly equivalent to DENSO X24EPR-U9 and DENSO IX24B, confirmed by shared applications in both manufacturers' official catalogues.

Equivalents

Part	Shared applications	Agreement
DENSO X24EPR-U9	20	87%
DENSO IX24B	20	87%

Verified fitments for the NGK DPR8EIX-9

Honda FMX 650 (2005–2008)
Honda FX 650 Vigor (1999–2003)
Honda SLR 650 (1997–1998)
Yamaha FJ 1100 (1984–1985)
Yamaha TDM 850 (1996–2001)
Yamaha XJ 900 S Diversion (1995–2003)
Yamaha XJR 1200 (1995–1998)
Yamaha XT 600 E (1992–2003)

Equivalence confirmed by 3 independent sources, last verified 22 July 2026. Always confirm fitment against your owner's manual.