I have just finished screwing together my 200. It's been going on for around 2 years! I've replaced various bits, powder coated the frame, new ring, small end etc but done nothing to the bottom half of the engine. The bike ran ok prior to the strip down. Now i have no spark. I've checked the plug cap and replaced it also the plug. The coil is not orginal and is rewired as it came off. I've removed paint to ensure a good earth. Not sure of the make but it has markings for a red, green and white spade turminal plus a black cable. I haven't removed the fly wheel as i don't have the right puller. Any ideas what or how to test next?