I would say it'd probably be ok... The peaks are a bit much though. that motor is rated for 90A continuous, 150A peak. Perhaps Pete can confirm the max peak of the 90HV, but I believe it's 126A peak.
But, people were running jive 80's on 700's for ages. Sport flying will most likely not draw peak currents big enough to cause the 90HV problems IMO. On a 600MX (75A continuous, 125A peak) it doesn't even get warm for me, also sports type flying with some mild 3D....
I'd suggest going for the 120 though really... More headroom is always good.
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Blade mCP X - Brushless, XP-7A, HP05S
Gaui X2, BeastX/Scorpion 3400kv/YGE-30A/GS-093/DS95i
Align AH-1 Cobra (T-Rex 500)
Align T-Rex 600 EFL Pro, SK720/600MX/YGE-90HV/BL9180/BL9188
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