Found this out with 10 min. of searching:
Balancing Beads – Warranty Void
Dunlop:
•Tires injected with dry/liquid balancers or sealants, or in which anything other than air has been used as the supporting medium.
http://www.dunlopmotorcycle.com/info-center/warranty-info/
Yokohama:
Tires that have had material added after leaving a Yokohama manufacturing plant, such as fillers, sealants, balancing substances and external tire treatments or materials of any kind. If the added material is the cause of a failure, a tire will not be accepted for warranty credit.
Michelin:
What about balancing beads or liquids?
Michelin does not recommend the use of dry or liquid balancers/sealers or any other balancing materials. Tires and Tubes into which these have been injected will not be covered under warranty.
http://www.michelinmotorcycle.com/a...urchase-and-use-of-my-tires/(language)/eng-US
Bridgestone:
Tires with sealant, balance, or other filler material that was not originally applied or inserted by the tire manufacturer. (#6)
http://www.bridgestonemotorcycletires.com/addinfo/warranty.pdf
Balancing Beads – Warranty Void
Dunlop:
•Tires injected with dry/liquid balancers or sealants, or in which anything other than air has been used as the supporting medium.
http://www.dunlopmotorcycle.com/info-center/warranty-info/
Yokohama:
Tires that have had material added after leaving a Yokohama manufacturing plant, such as fillers, sealants, balancing substances and external tire treatments or materials of any kind. If the added material is the cause of a failure, a tire will not be accepted for warranty credit.
Michelin:
What about balancing beads or liquids?
Michelin does not recommend the use of dry or liquid balancers/sealers or any other balancing materials. Tires and Tubes into which these have been injected will not be covered under warranty.
http://www.michelinmotorcycle.com/a...urchase-and-use-of-my-tires/(language)/eng-US
Bridgestone:
Tires with sealant, balance, or other filler material that was not originally applied or inserted by the tire manufacturer. (#6)
http://www.bridgestonemotorcycletires.com/addinfo/warranty.pdf