I've got a 66cc Angle Fire with slant head mounted up and everything to my bike but there's one thing holding me back....the chain. It originally came with a #410 chain which is the small one but I swapped it to the larger #415 do to some issues with the idler wheel and what not. I thought the chain would work fine because it looked like it had enough space and pumped on no problem. But when I went to test it, the chain would keep wanting to derail. Now here's my question. I have a Skyfire 66cc that uses the larger chain and is now out of use and I was wondering if I would be able to swap the engine sprocket from the Skyfire to the Angle Fire so I would be able to use the thicker chain. If so, how would I do this? I know the kit comes with these small tools for this purpose but I have no clue on how to use it. Does anyone know how to go about doing this? Or if it would even work. Worse comes to worse I'll just swap engines but I don't want to do that yet. Thanks in advance.