What spark plug is used on a 1993 Suzuki RM 125?

NGK R4118S-9 is the stocl plug but they are hard to find. Here is the answer I got from NGK for a replacement - - Hello,

The iridium BR9EIX stock# 3981 can be used in its place. The iridium plug has a slightly finer center electrode diameter and should give improved performance.

Regards,

Brandon Peeler

Technical Support Representative

Aftermarket Division

NGK Spark Plugs (U.S.A.), INC.

46929 Magellan Dr.

Wixom, MI 48393

The other that could be used is a BR9ES.