Yup your esc isn't up to the job I run the same combo in my touring car and the instructions say it's fine for that but for a buggy the motor limit's 12 turn. You'll need to get a speedo that can handle the demands of a buggy like hobbywings 60a esc or something similar.
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Hobao H2 Pro
Team Associated B4.1 FT
Ko Propo
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