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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
2003 YZ450F "ColdBlooded Issue"
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[QUOTE="Rich Rohrich, post: 1392789, member: 16241"] If the exhaust is sealed properly it will always pop a little on decel when these bikes are jetted CORRECTLY. Guys who set them up so it never pops are running them way too rich. Fooling around with the main jet won't fix a closed throttle decel popping condition. As Matt pointed out, getting the service manual and understanding which circuits in the carb correspond to various throttle settings would be the smartest place to start. Aftermarket pipes are notorious for sucking in air at the mating surfaces which will make for a lot of popping on decel. It would be worth your time to pull pipe apart and properly seal each joint with copper based high temp silicone. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
2003 YZ450F "ColdBlooded Issue"
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