The 6000 will fit with the adapter I made but it's too heavy. I think it's already to heavy with the 4000, using a 6000 will make it a brick with wheels.

The Ebay motor I ordered is too much also. It's rated at 8750kv and coggs like crazy, and a 10 minute run made the can run really hot. I'm going back to the stock motor anyone here need a 8750kv 280 motor?