Pop-Pop
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No, their plugs. And, I agree with all of what you posted. Just drove it back, told them the symptoms and walked home. A little pissed and depressed. I'm supposed to b leaving soon on a xcountry tour.Did you install the spark plugs or them? Seems like I read you did it, then they did it? I'm asking that because if they installed the plugs for you that you gave them, they may be counterfeit. Where did you buy them?
Sounds like bad or wrong spark plugs, spark plug wires not connected properly or the shop accidentally disconnected a vacuum line or fitting and didn't notice. Have you checked anything on the bike yet?
Good luck....