Quote:
Originally Posted by rwreuter
It's a 900 Classic with no modifications. The pops are very sublte, nothing sounding like a balloon popping or anything.
Actually, I think it sounds rather cool. I just concerned about any damage it may cause.
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It's uncommon to hear pops on stock pipes, but it doens't mean anything is wrong with your bike. It just means that your bike is burning on un-ignited fuel in the pipe on overrun, which is how it should operate for the best emissions. You can get rid of the pops by various means, but it will mean you are increasing the hydrocarbons emissions.