Yerf Dog Spiderbox Internal Reverse Engine Upgrade Package, 150cc, 175cc, 184cc

  • $769.00
    Unit price per 


Finally you can step up your Yerf Dog to be like all up to date buggies.  We have developed a bolt-in package for a reverse engine for your Yerf Dog Spiderbox.  This is the standard GY6 internal reverse engine that comes on all new buggies.  With this package you get:

  • The GY6 internal reverse engine
  • A reverse shifting package to change from forward to reverse.
  • Machining and welding of your axle.

This is a standard GY6150cc engine.  However, you can upgrade to a 175cc or 184cc racing engine. 

The shifting package included two shifting cables, shift handle and other hardware to change gears.

In order to get your axle sprocket to line up with the engine sprocket, you'll send us your axle and we will cut the weld on your axle and move the sprocket hub location over and re-weld.  

If you select the 175cc or 184cc engine they come standard with the upgraded transmission with the 1500RPM yellow spring, the high stall clutch and the performance variator.