Originally Posted by seypat

That's not true. The key word here is proprietary. If that particular bike or tool, etc company has deemed their product or parts exclusive, then any repair shop that is not an authorized dealer/repair shop, etc cannot touch it. If your look at the fine print of most warranties, any deviation from the manufacturers direction will void the warranty. If that product uses consumables, using unauthorized consumables from another companies will void the warranty as well.