If the machine is still under warranty, take it back to the dealer and have them fix it. That's what the warranty is for, and it's their obligation to do so.
New vehicle warranties come from the manufacturer, not from the dealer. If multiple dealers are available to you, you might take it to another dealer rather than the one whose "fix" was unavailing.
Given there was a recent change to the chain, if too much tension was placed on the drive gear (small gear near the engine)/bearing it could have caused some damage.
Check the chain for the correct tension (on most bikes there is a sticker on the swingarm showing how much slack there should be).
With the chain off the drive gear, check the gear for play/...
The clutches may use similar materials but are not interchangeable.
Wet clutches and Dry clutches provide the same functionality (transmitting torque to the gearsets) and use similar materials, but their design is very different due to their intended function.
A wet clutch must be bathed in oil at all times or it will fail very quickly, due to excessive ...