Internal Reverse GY6 Engine for External Reverse GY6 Buggies, 150cc, 175cc, 232cc

----------------------------------------------------------------------   We have developed a bolt-in engine package for a GY6 reverse engine for your external reverse buggy such as: Yerf Dog Spiderbox Tomberlin Crossfire 150 (yellow one) Kinroad and Blade SunL Carter Talon Dazon Rader Twister Hammerhead Roketa Baja Dune Manco Ace-Maxxam and other pre-2010 buggies.   Get rid of that gear box.  Many people have struggled adjusting it for years. MODIFICATIONS:  In order for this engine to work on your Yerf Dog Spiderbox you will need the following: You have to make changes to your axle.  Your axle sprocket is in the wrong location and cannot space over the sprocket in that direction without lathing, cutting the weld loose and re-welding the sprocket hub in the new location.  You can do this or send to us and we cut it loose for you click here.  It is best for you to re-weld since you can get the alignment exact with your engine sprocket.  We will re-weld if you desire but we will bia