Exhaust Popping

[rank]

I recently installed the V&H bagger dual exhaust on my 2007 nomad 1600. Since then I am experiencing popping upon deceleration. Mark Zimmerman of MC magazine suggested I try disabling the air injection system. Can anyone tell me how to do this or give any suggestions? The air box is stock and I did not add a fuel processor.

Any help is greatly appreciated!

[cactusjack]

Originally Posted by rank

I recently installed the V&H bagger dual exhaust on my 2007 nomad 1600. Since then I am experiencing popping upon deceleration. Mark Zimmerman of MC magazine suggested I try disabling the air injection system. Can anyone tell me how to do this or give any suggestions? The air box is stock and I did not add a fuel processor.

Any help is greatly appreciated!

Another cause of this is an exhaust leak at the head. Did you install new exhaust gaskets when you replaced the pipes? Have you checked them for leaks?

[ringadingh]

Even with new gaskets you sometimes have to fidget with the head pipes to get them to seal right. That would be the first thing I check to stop the popping.

[caddman11]

Check Gadgets pages on how to marble---it goes in a tube under the front solenoid under the right dog bowl.
http://www.gadgetjq.com/smogstuffremove.htm
That will probably clear most of it up.

[rank]

Thanks for the ideas. I did not replace the gaskets as they appeared not to be "crush" gaskets but just the thin metal ones. They looked like new, the bike only has 3000 miles on it. I will try checking for a leak and if none is found the marble idea sounds like a simple way to go.

Thanks again!

[macmac]

The gaskets most certainly are crush gaskets..

You may or not get rid of the popping ever... If you do the best way after getting gaskets is adding a fuel modual.

The best way to get rid of the reed valves which may or not stop the popping is to get rid of all of that system completely.

You can try stuffing the feed line with a big marble, or you can cap off the reed valve assemblies with caps.

Just making that mess all gone and capping off the vac port on the throttle body is the cleanest and best.

You would want Chucksters Coasters for that. These are simple plates you add on after the reed valve bodies are off, and the vac port is capped off as well.

The marble will tell you if the popping if from the reed valves or not.

You may also find that if you use more throttle controll you can controll the popping, by holding the throttle grop open just off full closed so far as the grip is concerned.

I allow my bike to gurgle with the throttle closed and if i don't want to let it gurgle I can hold a tiny bit of throttle.

Sometimes that gurgle and the cackling wake someone who needs it right UP!

With the TFI I have I can adjust any right out, but i don't.

[cactusjack]

Originally Posted by rank

Thanks for the ideas. I did not replace the gaskets as they appeared not to be "crush" gaskets but just the thin metal ones. They looked like new, the bike only has 3000 miles on it. I will try checking for a leak and if none is found the marble idea sounds like a simple way to go.

Thanks again!

They are indeed crush gaskets. I just put a new set on a couple of weeks ago when I removed my exhaust to service the swingarm.

[nomadmike05]

i recently put a vance and hines on my 05 nomad and have experienced the same problems i have also had to replace the rear header pipe due to it cracking after only 5000 miles. it was covered under vance and hines warranty but took me 4 weeks to get from them. they also told me i needed to add a fuel processor to avoid this in the future that it was now running to lean

[paulo]

The Marble trick is a simple fix that should work. Just follow Gadgets site: http://www.gadgetjq.com/smogstuffremove.htm.
Consider also removing the reed valves completely and replacing with coasters: http://www.gadgetjq.com/rv_removal.htm. These instructions are straight forward and easy to follow. You'll be removing the vacuum switch valve and reed valves---removing all the vacuum lines cluttering up the engine.
As recommended, add a Power command to monitor the fuel. ( other fuel monitor system)
I installed new Pipes and a Power command on my bike as well as an Airkit. I followed Gadgets advise to the letter and evan installed my own Power command----including installing the Map for my Power command-----end result----a few hours of my own sweat----resulted in a very noticeable increase in power and torque. Also-----absolutely no popping on acceleration or deceleration--through all power bands----

I will eventually take it to be mapped and tuned more precisely-----that parts for a pro though.

[chuckster131]

If you don't have any exhaust leaks, then you can add a set of coasters I make and that will disable the reed vavles and stop the pop.
http://www.gadgetjq.com/rv_removal.htm

Originally Posted by rank

I recently installed the V&H bagger dual exhaust on my 2007 nomad 1600. Since then I am experiencing popping upon deceleration. Mark Zimmerman of MC magazine suggested I try disabling the air injection system. Can anyone tell me how to do this or give any suggestions? The air box is stock and I did not add a fuel processor.

Any help is greatly appreciated!

[rank]

I stand corrected on the crush gasket. I've just never seen one as thin as a washer. The crush gaskets I've installed in the past on other bikes were much thicker.

Thanks for all the help and comments.

I stole a marble from my grandson and I'm going to install it and give it a test.

[ringadingh]

Originally Posted by Nomad Mike

i recently put a vance and hines on my 05 nomad and have experienced the same problems i have also had to replace the rear header pipe due to it cracking after only 5000 miles. it was covered under vance and hines warranty but took me 4 weeks to get from them. they also told me i needed to add a fuel processor to avoid this in the future that it was now running to lean

A lot of us have had that pipe crack, I doubt it has anything to do with being lean, I have a Power Commander installed and its cracked twice. Your lucky it was under warranty, because they do nothing for you once its over.

[ivan]

Try to raise Idle RPM. It will help a lot too.
A fuel processor is a good idea. With Power Commander - you'll have to add 10-15% advance for zero throttle positon within 1500 -4000 RPM range to eliminate popping on deceleration.

[flavor]

I had some popping after my accident in Mt. It woulnd up being a simple fix. The spark plug wire on the right, rear cylinder was loose.

Jist a thought.