ORIGINAL: BryFlyGuy67
Once again, I do not recommend that you run a 4S pack with the stock Align 430XL motor. If you want to anyway, despite this advice, you should at very least least get an external BEC, such as the SportBEC, and drop your pinion down to 10T (if you can find one).
For a 4S setup, you should check out the lower kV motors from brand like MedUSA, Scorpion and NEU.
My $0.02. Your heli is yours to do with what you want.
I understand about the motor change and was considering it to lower my RPM to around 2800. I guess I didn't say but this is a new setup for me that I was experimenting with, that's why I only bought 1 4s lipo for testing. Why should I add a BEC though? I have checked the output voltage of the ESC going into the receiver and I believe it was either 5.1 or 5.2 volts well within the recommended voltage for my Fut 401 gyro and Spektrum receiver.
I appreciate the advice but the questions were originally about a vibration not setup.
LOL what is a 430XL motor I have a 450 SE with a 430L motor.