This is a project that I have been working on for quite some time now. I converted the small electric motor that came stock with this Razor Pocket Mod, that I picked up for about 20$ at my local thrift store, and I put in a Predator 212cc Engine (with governor). This bike takes me to about 35mph in 5 seconds which the governor then tops the bike out. I am using a 56 tooth rear sprocket that is bolted on to a plate so the sprocket can fit into the tire. I also removed the rear break due to some issues, because who really needs brakes. The throttle kit costed me about 20$ and so did the centrifugal clutch. I picked up all my items off of Amazon. The whole build cost me about 200$ and this thing is honestly a blast! I wouldn’t recommend taking this thing offroad but it is honestly a fun time.