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It may be just my 07 RKClassic but I suggest that you check the front spark plug HT lead.
Mine was rubbing on the bottom of the fuel tank link pipe clamp, enough to wear a slight dip in the lead.
Its no big deal as long as you catch it, I just cut a length of black fuel pipe, split it and slipped it over the HT lead, so it wears and not the lead. If it wears through I'll just replace it. From the wear I saw should be good for about 10,000 to 15,000 miles.
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