I have a 97 700sx that the center plug is not turning color. I have cleaned the carbs and it starts fine and runs ok, but the plug is not brown. Have had this sled for 6 years and nothing is changed on it. Any ideas? Thanks Rich.
your running too cold of plug! br10es's are too cold .you are experiencing a cold white on your plugs!( not burning hot enough to get your color) put in a set of br9es's or br9eya's ,it should start to darken up!rich said:I went back through the carbs and did not find anything wrong. Put it back together and installed br10es plugs and rode it. On the low end it starts to show some color on the plugs,but when you go out and start to trail ride it the plugs turn back to WHITE. I sprayed a little carb cleaner around the seals and carb boots, air box boots and noticed no change in rpm. Would a fuel pump or fuel filter problem cause this? Thanks Rich. Also it is all 3 plugs not just the center.