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View Full Version : Spark Arrestor(400ex)



SNIPA
03-28-2002, 01:05 PM
I cut out the spark arrestor and placed end cap back on. It is a lot louder. It's hard to tell by the seat of your pants how much power I gained. I am all stock except a uni air filter. Do I need to rejet or raise the needle. Will I be too lean running like this and hurt the motor?