I am in the process of rebuilding a 1986 CR500. I have it mostly back together and trying to get it started. It has been sitting for a long time. It has good compress and clean gas. It has what I consider weak spank on the plug. I measured the primary coil resistance and it's .5 ohms. The manual I have calls for a spec range from .2-.4 ohms. Then I see another value online of .2 ohms. Which is correct? Could this high resistance be the root cause for my weak spark?