I have a 2004 Ultra classic with K/N extreme air filter, upgrades screaming eagle cam plate, Andrews 21 Cam's and power commander III usb. I just purchased and installed full bore slip on's 2.5" baffle and the left side exhaust coming out of the pipe is cool to Luke warm at best. After rigging 50 miles, the left side muffler is cold to the touch. Right side is hot as should be. When bike is running, you can hear and feel the air coming out of the left exhaust, it's just not hot. It's cold and exhaust pipe doesn't heat. I spent the afternoon with Dynojet dialed in the my bike and no answers. I unplugged the power commander and hooked the bike straight us to the factory ECM (bypasses power commander) and same result. At a loss here and not what to do. Not sure is this is common and I'm over reacting but I've never had one pipe not
Get hot. Any help or feedback would be sincerely appreciates. Thank you!!!

 

Left side doesn't see a lot of exhaust gases. Most shoots out the right side. Sounds normal to me.

 

yup like dixonk said, your good to go,,,

 

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Few things to consider.

* YOUR NEW PERF MUFFLER IS LESS RESTRICTIVE /LESS BACK PRESSURE WHICH CAN MAKE IT RUN COOLER.

* COULD HAVE AN EX LEAK ON JOINT WHERE NEW PERF MUFFLER MEETS MAIN HEAD PIPE.

But since you didnt say it running poorly post installing the new mufflers i would not think there isn't anything serious wrong with the motor.

I find on my 09 flhtcu that left side ex flow feels as though it's approx 55-60% cooler then right side ex flow when feeling it on the palm of my hand with stock ex system.

Scott

 

Just ride it

 

Exactly!

 

Find something else to worry about. You'd know if it was running on one cylinder.

 

Wait....what?

Most guys here complain their exhaust gets too hot. I think this is the first post I've ever seen where a guy is complaining his is too cold.

 

Are you sure you have the new mufflers mounted on the correct side? A lot of mufflers are designed side-specific in regard to the restrictions built inside the muffler that, when mounted on the intended side, will create appropriate back-pressures.

 

I don't believe that's the case on full boars