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Free "Starter Kit" with every Pit Bike Purchase ($139 Value)

          
details on free starter kit


Race Engines/Motors
Free Shipping on all upgrade part orders over $99
($30 shipping charge on all complete motors)

125cc Zongshen "Stock/Mod" Race Conversion Motor (12.5 HP)

 

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

  • 4 spd 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
    pit bike race motor

 

125cc YX "Stock/Mod" Race Conversion Motor (13.5 HP)

 

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

  • 4 speed, 4 up shift transmission

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

  • High Performance Cam Shaft

  • 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: $579
    pit bike race motor

125cc Jialing "Stock/Mod" Race Conversion Motor (13.5 HP)

 

  • Our Stock/Mod Conversion on the Jialing 125cc

  • Start in any gear, 4 spd 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: $629
    pit bike race motor

 

146cc OPBS Competition "Race" Motor
(Complete Setup YX Motor)

  • Our custom built 146cc race ready for competition. (15+HP)

  • Custom Port & Polished 23mm/27m Large Valve Head!!

  • Performance Cam Shaft

  • Lightened Oil Slinger

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

  • Start in any gear, 4 spd transmission.

  • Mounts to any standard 125cc exhaust pipe




    Price: $849
    pit bike big bore kit

 

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

  • Our custom built 150cc race ready motor. (16+HP)

  • Custom Worked Port & Polished Head

  • Performance Cam Shaft

  •  Includes an Inner Rotor Kit w/ Hyper CDI Box, 26mm Mikuni 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 spd, 4 up transmission.






    Price: $899
    pit bike big bore kit

 

"Exclusive" OPBS Race Edition 170cc YX Motor
JUST RELEASED!!

  • Our custom built 170cc race ready motor.(17+HP)

  • Custom Worked Port & Polished Head

  • Ceramic Coated, Aluminum Cylinder

  • Performance Cam Shaft

  •  Includes an Inner Rotor Kit w/ Hyper CDI Box, 26mm Mikuni 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 spd, 4 up transmission.
    (We recommend the OPBS Mikuni 26mm or Keihin 28mm carb. for this bad boy.)




    Price: $1099
    pit bike big bore kit

 

 

   

 

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866-475-5692
California - Texas
Corporate Offices: The Fun Factory 5415 Acton Hwy / Ste 124  Granbury, Texas

 

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