popping in the airbox??

3 replies to this topic
  • Shane_Bettin

Posted November 05, 2004 - 10:17 AM


well i had an air leak in my airbox that i didn't know about which caused my bike to run real lean. i didn't know what was wrong at the time so i richened up all the jets. 182 main, 4th or 5th clip(can't remember right right), and a 45 pilot with 1 3/4 turns on on the screw. now that my airbox is sealed up when i have the seat off and the engine idling, if i put my lear to the filter i can here a popping in the airbox/carb. i also noticed a slight change in idle everytime it popped. i haven't riden it yet since i sealed the box so i haven't done any plug tests or nothin. im goin for a rip today so ill see how it runs, but wahst could be causeing that popping on the airbox side?

  • yz426onNOS

Posted November 07, 2004 - 11:12 AM


Maybe a backfire.

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  • YZ250F_Rider

Posted November 07, 2004 - 01:53 PM


what you hear is the throttle plate. Take the seat off and it should be very easy to hear.

What do you mean you sealed up the airbox?

  • yzf450jack

Posted November 08, 2004 - 08:49 PM


Your intake valve's may be going see if valve adjustment is good The gap may be gone

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