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jetting a 400ex

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Old Aug 14, 2007 | 12:40 AM
  #1  
Sontizzle's Avatar
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Default jetting a 400ex
what size jet should i put in my 400ex? i have a white brothers exhaust, stock head pipe, twin air air filter, 14tooth front sprocket, and im removing the air box top. i have the K&N jet kit.
 
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Old Aug 14, 2007 | 10:18 AM
  #2  
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From: Chickasha, OK
Default jetting a 400ex
Don't know much about K&N kit but on a dyno jet at sea level to 3000ft use 170 with airbox lid off. White bros usually sends a keihin 155 with there pipe.
 
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