125cc Zongshen Motor

• The motor that comes on the OPBS X & X3R

• 1 Down, 3 UP Transmission

• Foldable Shift Lever, Kick Starter, Kill Switch and all Wiring Hardware.
  (We recommend the 24mm Mikuni carb. for this motor.)
  
  
  
  
  
  
  
  Price: $279
  

• The famous motor that comes on the Pitster Pro's! Comes completely assembled and ready to bolt on. Start in any gear, 4 up transmission.

• High Rev CDI, Coil, Electronics, 22mm Mikuni Carb., Throttle Cable, Clutch Cable, Foldable Shift Lever, Kick Starter, Kill Switch and all Wiring Hardware.

• Start in any gear, 4 up transmission.
  (We recommend the 24mm Mikuni carb. for this motor.)
  
  Price: $399
  

• This is our race conversion motor that we run on our stock/mod race bikes.

• 1 Down, 3 UP Transmission

• High output Inner Rotor Kit w/Stage 3 Hyper CDI

• High Performance Cam

• Custom ported head (OPBS Exclusive)

• Foldable Shift Lever, Kick Starter, Kill Switch and all Wiring Hardware.
  (We recommend the 26mm Mikuni carb. for this motor.)
  
  Price: $499
  

140cc GPX Motor (Complete Setup)

• The original GPX with a 140cc big bore kit completely assembled (13 HP).

•  Includes an Inner Rotor Kit w/ Hyper CDI Box, 26mm Chinese Carb., Air Filter, Oil Cooler, Throttle Cable, Clutch Cable, Foldable Shift Lever, Kick Starter,  Kill Switch and all Wiring Hardware.

• Comes with Lifan 23mm/27m Large Valve Head!!

• Start in any gear, 4 up transmission.
  (We recommend the 26mm Mikuni carb. for this motor.)
  
  
  
  
  
  Price: $489
  

  "Exclusive" OPBS Race Edition 150cc GPX Motor
JUST RELEASED!!

• Unbelievable power from a horizontal style motor (15 HP).

• Includes: Stage 3 Inner Rotor Kit, K & N Style Air Filter, Upgraded Throttle Cable, Foldable Shift Lever, Kick Starter & Kill Switch.

• Completely assembled.

• Start in any gear, 4 up transmission.
  (We recommend the OPBS Mikuni 26mm or Keihin 28mm carb. for this bad boy.)
  
  
  
  
  
  
  Price: $469
  

  160cc GPX Motor
JUST RELEASED!!

• Same great motor just more CC's!

• Unbelievable power from a horizontal style motor (15 HP).

• Includes 26mm Chinese Carb., Air Filter, Oil Cooler, Throttle Cable, Clutch Cable, Foldable Shift Lever, Kick Starter,  Kill Switch and all Wiring Hardware.

• Completely assembled.

• Start in any gear, 4 up transmission.
  (We recommend the Keihin 28mm carb. for this bad boy.)
  
  
  
  
  
  
  Price: $599