Just bought a 97 Grand Touring 700 SE. This sled came with NGK BR9EYA plugs, but Royal Distrubuting said to use BR10ES. Any sugguestions as to which is right?
The original spec for your sled was BR10ES. Later, Doo updated it saying the BR9ES is the recommended factory plug. I personally use BR9EYA in my sled, starts easier, fouls out less. I have stock jetting in my 97 Mach 1 700 triple, and I can easily run a couple years on 1 set of plugs, even when riding when it's 40 degrees F out.
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