Seems to me that Kawasaki has some of the softest aluminum on their bikes. I have a 2011 KX450 and the swing arm and frame dent too easily. Additionally, the frame holes for bolts strip easily and the motor side cases are way too soft (I had a small get off and the clutch cover cracked and leaked all oil out while on a ride)...
However, the motor on the Kawi is awesome and can outweigh the other small issues so long that the integrity of the aluminum holds up; in addition to the fit and finish on the bike as a whole.
Nevertheless, depending on how new your bike is and if its under warranty, I take it to the dealer and make them replace the swing arm. If welds break on a tip over, it makes me question the integrity of critical welds within the swing arm/frame---Can be scary, especially if you're riding off road.
Everyone is trying to accomplish something big, not realizing that life is made up of the little things. ---Frank A Clark
2014 KTM 500EXC; Gold Valves RaceTech, FMF, EURO MAP, 14/50
2011 KX450F, Race Tech, Scotts