u/Apprehensive_Toe485

i was trying to install a chain drive on it and during the process i found a pretty large crack on my swing arm. it's covered by the rear fender so it was unidentifiable until now. what should i do? i can't purchase a new one tho.... it was also squeaking like crazy i thought it was the suspension till i put some lubricant on the crack and it stopped.

I just bought this bike and he said that it was a 2.0 when I checked it it only went 50 mph even with the turbo, but the back does have a flat and the vin says eride model:ss
the battery doesn't say that anything i think the sticker was peeled i need help identifying it please.