Go Devil fuji motor help please

Does anyone have schematics for this? Ignition and timing info? As well if needed where can I find points or a coil and any other replacement parts? Are gaskets available for the case, jug ect.? I've owned this since I was 12 and I'm 52 now. It's always been dependable and recently it started to run rough. Won't full throttle but starts up with one pull. 168920803528552800519363128831.jpg