I have a 1993 Low Rider with an 80 cubic inch. The engine has had a larger cam put in it before I bought it. Other then that it is a stock motor. I have notice in the last couple of weeks that I have a new&nbsp\\;tapping noise that is louder in the rear cylinder then the front cylinder and you can only hear it on the right side of the bike and not on the left side. This is my first Harley so I have no idea what it is but it wasn't there a couple of weeks ago.
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Any info would be greatly appreciated.

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I forgot to mention that it only has 23,000 miles