Annoying 'Popping' Nose On Cold-Start

Feb 2, 2017
155
6
18
California
Whenever I cold-start my bike, there is a loud pop pop pop noise that I'm assuming is coming from my exhaust manifold pipe...... I've tightened it down to make sure it isn't leaking and I see no holes in it. My question is, what's causing the pop pop pop sound when starting the motor up? It's never done this before, perhaps I need to take off the exhaust cap at the end and clean the pipe? Is the pipe clogged and just needs to be cleaned internally?
 

MotorBicycleRacing

Well-Known Member
Jul 28, 2010
5,845
107
63
SoCal Baby!!!
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Whenever I cold-start my bike, there is a loud pop pop pop noise that I'm assuming is coming from my exhaust manifold pipe...... I've tightened it down to make sure it isn't leaking and I see no holes in it. My question is, what's causing the pop pop pop sound when starting the motor up? It's never done this before, perhaps I need to take off the exhaust cap at the end and clean the pipe? Is the pipe clogged and just needs to be cleaned internally?
Potato in exhaust?
 

crassius

Well-Known Member
Sep 30, 2012
4,032
155
63
USA
reminds me of being a kid back around '52 - we did that to a car and it blew out and shattered a huge plate glass window in a store it was parked in front of