[dhgeyer]

Y'know, Sarris has a point. A spark plug costs less than the Techron, is easy enough to replace, and you'll know right away if that was the problem. Since it's still the height of riding season and you want your bike, why not try both approaches? From your written description, I still vote for carb issue. If the plug or a coil was bad, I don't think it would improve with warming up the engine, and I'm pretty sure that it wouldn't matter how much throttle you gave it. But, for the price of a plug and 10 or 20 minutes to swap it out, why not? You could then at least look at the old plug and "read" it, which could give you valuable information on where to look next. I generally keep spare plugs with me when I ride, especially on a "thumper". Even if they aren't the original problem, they can be the victim of other issues (like getting fouled up from way too rich of a mixture), and need replacing along with whatever else needs to be done.