Motorcycle Club » Star 1100 Classic & Custom

Exhaust Pipe Discolorization

10 posts from 7 voices
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  1. fupar
    #

    When your exhaust pipe is showing a discoloring (blue, purple, etc.,), is this a sign of trouble? Or is this just the normal occurence that happens after a few years of the exhaust getting hot from normal usage?

    I am not sure of the terminology of the different parts of the exhaust pipe, but I was looking at a bike where the exhaust pipe's front piece connects to its tail-end piece (near where the passenger's foot pegs would be), and this is where the discoloring was. Could this be caused due to not having a good seal where these two connect?

  2. bazdorrop1
    #

    It could indicate that the bike is lean.

  3. 2WheelPik
    #

    For what it's worth, I've heard that gold discoloration may indicate the mixture is lean, and blue discoloration may indicate the mixture is rich. Notice that I said "may indicate!!" Some people swear by this, others say it is a bunch of bunk.

  4. N2cr7zharg
    #

    I've actually heard the opposite of 2WheelPik and I've also heard that location indicates more that color. Who knows...not I. ;0)

    I thought my bike was running rich because my front header pipe was turning gold. Now I'm not sure what the case really is. I can tell you even with a gold front pipe, my front spark plug looked in the normal range after about a 1000 miles on them, but my stock PMS setting on both carbs was set really lean (1.75 turns out from the factory).

    I'm in the process of making some changes to the bike so I'm interested in seeing how the pipe looks afterwards. I can also tell you that Blue-Job did a great job of removing the gold coloring from the pipe (so I do have a 'clean' slate to start from)...

  5. jkd4
    #

    A discolored pipe could be a lean condition. Most of the factory pipes I see that have turn colors it is because the customer has left the choke on to long. Aftermarket pipes that blue mostly are a single walled pipe and there is nothing that can be done about that.

  6. fupar
    #

    Aftermarket pipes that blue mostly are a single walled pipe and there is nothing that can be done about that.
    That's ok with me. I just wanted to know what I would be getting myself into, if I were to get that particular bike.

  7. koltzmye
    #

    Hi,
    the front header pipe on my 2000 v-star 650 classic has turned colors recently, some golds, blues, and purples. I also have some discoloration at the joint between the header pipes and the tail pipes. I saw in an earlier post that someone mentioned blue-job. I've never heard of it, can someone explain please. Oh yea....in addition to the discoloration, I was detailing my bike once, and was buffing the wax off with a microfiber rag, when I looked down and saw some dried wax on the front header pipe needded to be buffed. So I swiped it with the rag, and the rag stuck to the "F---ing HOT PIPE THAT I FORGOT WAS HOT!!! When I immediately ripped the rag off the pipe some of the wax coated fibers had melted to the pipe. Any suggestions on how to get these pipes back in shape??

  8. N2cr7zharg
    #

    Blue Job is a special polishing compound designed specifically for chrome. It does a good job on light - medium discoloration. I don't know how good it works for bad discoloration but should improve it.

    Here's a link for the Blue Job: autogeek.net/bluejob.html?gclid=CLTczrueno4CFSasGgodIiUhaA

    or their own site at: blue-job.net/

  9. MigejCojode
    #

    Hi, the front header pipe on my 2000 v-star 650 classic has turned colors recently, some golds, blues, and purples. I also have some discoloration at the joint between the header pipes and the tail pipes. I saw in an earlier post that someone mentioned blue-job. I've never heard of it, can someone explain please. Oh yea....in addition to the discoloration, I was detailing my bike once, and was buffing the wax off with a microfiber rag, when I looked down and saw some dried wax on the front header pipe needded to be buffed. So I swiped it with the rag, and the rag stuck to the "F---ing HOT PIPE THAT I FORGOT WAS HOT!!! When I immediately ripped the rag off the pipe some of the wax coated fibers had melted to the pipe. Any suggestions on how to get these pipes back in shape??

    What you really should do is get the jetting fixed on those carbs. It shouldn't turn colour that quickly.

    As for the rag that's burnt on everybody has their own tricks. Most times you are best off using a little elbow grease. I've heard naptha on warm (not hot) pipes works.

  10. fupar
    #

    That's ok with me. I just wanted to know what I would be getting myself into, if I were to get that particular bike.
    Well, I decided not to get this bike.

    I ended up getting one that had the Vance & Hines pipes on it, and there was no discoloration on it anywhere. (So far.)

    Thanks for all of the responses.

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