Hi everybody, i m new in this forum...

I just bought a viper combo with vtx 10 esc and 8.5 motor to put in my xfactory x6. my problem is that the motor is very low I have no power (impossible to jump the double at my club when all my friend with speed passion and lrp 8.5 motor jump it easily) . my motor ran like a 10.5 or 13.5 with 23 pinion (I read good ratio is approximatively 9) the motor begin to work correctly with a 28 pinion (ratio 7.2) but with this ratio the motor temp is too high and power is not awesome.
that s my esc setup :
VTX10-Profile#2

Brake strength 80%
Brake PWM freq 8000HZ
Brake curve linear
Neutral drag brake 5%
Throttle PWM freq 9600Hz
Throttle punch 90%
Throttle curve linear
Deadband middle
no timing- default
no motor protection
no esc protection

Is it normal ? good motor for 2wd buggy is 6.5 with viper product ?
thank s for your advice and i hope my english was not too bad...