FatBoy Mini Eco Gear Drive 1:3.5 or 1:4.2 ratio for FatBoy 320 hangers or Vertigo Precision - Infinity Precision ATB Truck , works with MBS Rockstar II Hub or Trampa SuperStar Hub . 

All parts are made in the EU

Full review 

After purchase will be shipped within a 1-2 week period

Motor, wheel hubs , spacers , baseplate MBS , gear lubricant and bumpers don't include in the kit!

For version Precision Infinity ATB hanger don't include in the kit!

Motor Fitting:

Easy steps to assemble:

• Add thread lock (Loctite 648) on the motor shaft, insert the key into the keyway slot.
• Push the motor shaft with the key into the drive gear.
  Add thread lock (Loctite 648) to motor screws, screw the motor to the mount.
• Liberally add the provided grease after everything has cured.
• Close the gear drive.
• Make sure you add a little bit of grease under the V-Groove ring!
• Mount it on the baseplate.
• Ride and enjoy!

Kit Contains:

• 2 x Motor spur Straight gear (12-10 tooths) for 8mm shaft
• 2 x Wheel Hubs with gear (42 tooths)
• 2 x Aluminium Hanger mount adapters (Three positions -15º, 0º, +15º)
• 2 x Aluminium Baseplates anodised black with the motor mount holes
• 2 x Plastic Gearbox covers
• 2 x V-Ring
• 2 x Stainless Steel Slid Plates for V-ring
• 2 x FatBoy 320 Hanger (Compatible with MBS Metal Matrix II Top Truck you can purchase baseplates from here)
• Screw kit
• Gear lubrication

Motor spur gear hole re-machining to 10mm with keyway here

2x FatBoy Mini Eco Gear Drive weighs 1200 g.

2xFatBoy 320 hangers weighs 1600g.

I recommend to buy gear lubricant here

Bumper files for printing can be found here