I have a cb200t. It starts and idles normally. After about 5 minutes, the idle starts to drop slowly and progressively until it just dies. I let it cool down and this just repeats. Float level, points gap, timing, idle jets clear, plugs all check out. It seems to be a heat issue. Any ideas out there? I'm thinking the coil is toast and gets bad with heat. I just changed the oil. It was full of fuel from lots of hard starting.