Ok guys...I installed a set of Rush Racing 6020ST-175 pipes on my '91 Heritage Softail Classic back in January. There's a tick coming from the exhaust at idle that seems to be coming from the top pipe. I pulled the pipe to make sure there was nothing loose inside the pipe that could cause a rattle. Still have the tick. Any ideas?

https://youtu.be/c-EisN2PwJs" target="_blank">https://youtu.be/c-EisN2PwJs

Sorry...the second video is a little shaky.

http://youtu.be/tlTXLtUlLaM" target="_blank">http://youtu.be/tlTXLtUlLaM

Thanks,
Tony

 

Sounds fine to me.

 

That sounds like a burnt valve to me, have you done a compression test, or leak down test?

 

its hard to tell from a video but it sounds like an exhaust leak rush pipes are known for leaking at the o2 sensor ports and at the head they have a crappy quality control department.

 

Compression / leak down test was done about a year and a half ago and it was good. Still runs good, just that anoying tick when idling.

Thanks Dale...I wish I'd know about the QC before I picked them up. I replaced the gaskets when I installed the pipes with tapered mesh gaskets. Also used Never Seize on the o2 sensor plugs. I did pick up a new set of HD tapered 65324-83B gaskets this afternoon. They're still tapered, but harder than the mesh gaskets. I'll see if I can find a leak...quit smoking 11 years ago, otherwise I'd use a cig...but don't need to get the temptation again.

Tony

 

When did the tick start?

 

Take the rear pipe off and look for a carbon trace. As loud as that leak is you should see something and just for the hell of it do a comp and leak down test. Its definitely in the rear cylinder or exhaust.

 

The tick started about a month after I changed the pipes, so sometime in February. I did re-torque the exhaust flanges. From what I can tell, it only does it at idle though. It sounds like the tick is coming from the top pipe. In the second video, the upper exhaust pipe without the heat shield on it would not allow me to hold my hand over it…it would force my hand out. The bottom pipe still had the heat shield on it and is not air tight like the actual exhaust pipe, there’s a gap around where the pipe goes into it and the cutout on the back.

 

Actually by the video it sounds as if your getting it at higher rpm's as well. When you put the pipes on did you re-jet the carb? For now Pull the plugs and post a pic. It will tell a lot.. Just let us know which one was the rear....Thanx....

 

I don't have the equipment to do a compression / leak down test, I'll have to get my indy to do that.

I'll pull the plugs in the morning after I get off work and get a little rest. The carb was re-jetted when I changed the air cleaner out and I have checked the plugs in the past to make sure they aren't white. I'll check in the am to see what jets are in it. From memory I think it's 45/185 with a CVP needle.