VMA-B210X Bird Dog 06-12 ARF - Stage 12 Installing Electric Motor and ESC - Step 12C Mounting Screw (Bolt) Set
Question: Stage 12 Step 12C of my B210X Manual refers to installing three bolt and washer sets for mounting the motor. These bolt sets are stated to come with the kit but I did not get these in my kit. What's the story here?

Answer: The reference to the bolt sets (mounting screws) in your version of the B210X Manual is incorrect. The motor mounting system was modified to use four mounting screws not three as stated. These mounting screws come with the Power Module and Power Pack but are not included with the kit. Each motor is different and requires different mounting hardware and methods. We do provide a blank firewall set that can be drilled to suit nearly all motors.  
Mounting Screws - What to use on VMM-111B18VM VMAX Brushless Motor

Question: I have a VMAX #VMM-111B18VM VMAX Brushless Motor. What do I need in the way of mounting screws?

Answer: There are a several options for this depending on what you have in mind:
a) VMAX VMAX #VMM-111B18VM VMAX Brushless Motors that are supplied with VMAX Power Modules and VMAX Power Packs come pre-mounted with the appropriate screws for the motor.
 
b) The threads are 3mm and generally four 3mm x 6-12 mm machine hex head screws with washers will work.
 
c) We sell a Mounting Screw Set (#VMM-111B18MS) consisting of four 3mm x 10mm hex head screws. Hex head screws should be used with flat washers under the heads.
 
d) We also sell a Mounting Screw Set (#VMM-111B18MT) consisting of 16 mounting screws. Four screws in each of four different sizes/styles.
  • 3 x 10 mm Hex head machine screws (4) (like VMM-111B18MS)
  • 3 x 16 mm Hex head machine screws (4) (longer version of above)
  • 3 x   6 mm Phillips countersink head screws (4) (for flush fitting)
  • 3 x 10 mm Phillips countersink head screws (4) (for flush fitting) 
The four different sizes/styles allow for thicker firewalls, multi-layer firewalls where the screw heads must be countersunk between the layers, etc.
 
This set provides for a very wide range of different mounting methods.
 
Hex head screws should be used with flat washers under the heads.
 
CAUTION: When mounting motors using any method, ensure all fasteners are tightened securely. Check for vibration free operation of the motor. If not vibration free, reseat and retighten all fasteners and ancilliary components such as props and gears. Tighten fasteners firmly but don't strip the threads. Use medium strength thread locker on all metal to metal fasteners.