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Thread: How I modified my stock FXR pipe

  1. #1
    Join Date
    6th August 2008 - 09:18
    Bike
    FXR150 Bucket, RM125
    Location
    Wellington
    Posts
    916

    How I modified my stock FXR pipe

    I have been asked by one or two people how I modified my pipe on the FXR1fiddy. The photos are below. Figured the bike is common in buckets so others might want to give this a go. There are a few benefits from doing it.

    Basically if you want to do EXACTLY what I did, follow these steps:
    Take pipe off bike. Note from the pictures the around-about measurements from where I have welded it (note I made this by eye so no exact measurements were taken).
    Cut the header pipe an inch longer than where you measured just to be safe.

    Cut the mount on the muffler off keeping the cut as CLOSE as you can to the muffler. This is because you are going to be using this mount again! Cut each end off the muffler AT THE ORIGINAL WELDS!! It is thin material so it shouldn't take you long at all. Use a really thin disc on a grinder for each of these steps.

    Take a look inside the muffler and you will see how freakin' restrictive the thing is!! From here I just shortened each end of the muffler by about an inch and a half because any further on each end and I would have been cutting into the packing.

    Weld the ends up then slide the muffler on to the header pipe and choose the horizontal angle you like (I may have taken some length of the cone area on the muffler, I am not too sure! I just made sure it was as short as possible). Keep the muffler as close as you can to the bike for clearance and also for the mount that will be put on which is quite short (see photo for the mount).

    One thing I could recommend here would be to not point the end of the muffler straight at the rear tyre. I haven't had a problem with it yet on mine, and I like to joke that it warms the LHS of my tyre but really it's probably not too smart.

    Once you have tack welded the pipe while on the bike in the position you desire, take the mount you cut off earlier and line that up with the bellypan fairing mount (I am pretty sure that is what I have used) with the bolt you will be using for it. Tack weld that onto the muffler.

    Take the pipe off and weld her up, give her a paint and she's good to go!!

    I used a TIG welder for all of it, but I am sure a MIG could do it I suppose. Ideal work for a TIG really. I highly doubt ARC could do it!! The bike sounds a little bit gruntier but still quiet in comparison to a lot of the other buckets. It also backfires under heavy engine braking now. It apparently isn't harmful and I am not down on power or anything now. I reckon it makes the bike sound meaty as!

    I mostly did this for the look and also for crashing - I don't want to bust the thing when it hits the ground! You can see scratches are still on it from previous crashes when it was still mounted to the side of the bike. I also need to clean off the surface rust and give it a proper paint job.








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  2. #2
    Join Date
    6th August 2008 - 09:18
    Bike
    FXR150 Bucket, RM125
    Location
    Wellington
    Posts
    916
    Hopefully the pictures explain it all, because I just winged it so it is kinda hard to to explain how I did it in exact measurements.
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  3. #3
    Join Date
    8th April 2005 - 23:14
    Bike
    Joe2 the ALMIGHTY
    Location
    Christchurch
    Posts
    1,520
    thats a great idea, cheers for posting!

  4. #4
    Join Date
    7th March 2008 - 14:22
    Bike
    rs125, kdx200, bucket
    Location
    north shore
    Posts
    576
    Awsome. I really should invest in a welder (and then learn how to use it!)

  5. #5
    Join Date
    26th April 2009 - 19:22
    Bike
    SP1 and fxr
    Location
    Auckland
    Posts
    27
    I've just done mine after the avice from this thread. It's awesome and this method makes an excellent underside exhaust. See my thead wheel conversion. Thanks Hmurphy.

  6. #6
    Join Date
    6th August 2008 - 09:18
    Bike
    FXR150 Bucket, RM125
    Location
    Wellington
    Posts
    916
    Glad I might have finally helped someone else! It looks cool mate! Good stuff

  7. #7
    Join Date
    11th July 2008 - 21:37
    Bike
    CBR125R RACE BIKE
    Location
    auckland
    Posts
    1,121
    you should drill out the baths so it sounds like mine...
    chuck norris's calender goes from march 31st to april 2nd

    No one fools chuck norris.......

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