I took a really hard landing today and bent the exhaust header and cracked it a bit. Started it back up anyhow and it wants to keep going when I let off the gas. I toiled it apart to see if the clutch spring had broke which has happend before but it was still good. Put it back together and started it up again and I took off again, glad I was holding onto it. I checked to make sure my throttle wasn't stuck by pulling the throttle and watching the carb. I looked ok.
I'm still new to nitro so I didn't know were else to look