I've never ran kevlar in rhe fronr, just in the rear. You need some really good stopping power up front and I've always ran sintered. EBC's and no squeal.
When I was an auto tech, we always found a sqeal to be dirt/sand in pads, nothing mechanical. We ran then back and forth a few times on flat concrete or sand paper and no more squeal. Easy fix but temporary.
There's tons of products at auto parts stores too.
2002 Honda 919
2003 Honda CRF450R