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Originally Posted by standard_63
I have this same setup -- 9920, 7XL, 4s lipo. It runs great for about 6 minutes and shuts down. Sometimes runs again for 6 more minutes, sometimes only 30 seconds or so. I ordered a 125b controller which will hopefully work with the 7XL cuz it's so darn fast! And pulls wheelies at 30mph! If the 125b doesn't help with overheating, I'm going 8XL. (or, more likely 1950/8 or Neu 1515/1y)
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If the esc is getting to hot. Try to drop down a few teeth. If the motor is running hot. Try a few teeth down or up.
What gearing are you running?