I was going to order this (price is right) but I haven't used my HV4.5 since the ESC locked up and thinks the rotor is stuck. Have a hard time forking over 80.00 to replace the esc. It on special (or closeout) they only have one left.
http://www.losipartshouse.com/servle...s-Motor/Detail
You may have to hit the novak site to verify the part will fit your motor.
I have 5000kv written down for the HV4400. Debatable by some.........