1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

Exhaust question...

Discussion in 'XJ Modifications' started by SKRAM, Feb 24, 2011.

  1. SKRAM

    SKRAM Member

    Messages:
    43
    Likes Received:
    0
    Trophy Points:
    6
    Location:
    NY/VT border
    I am going to start making my exhaust this coming week and I have a different idea than I originally had. Now I am envisioning 4 pipes straight back (longshots) I want the pipes to go all the way to the back of rear tire. My question is does anyone foresee any problems with having 4 individual pipes?
     
  2. Maxim-X

    Maxim-X Well-Known Member

    Messages:
    1,696
    Likes Received:
    76
    Trophy Points:
    48
    Location:
    London Ontario Canada
    First off, ground clearance, second, making some kind of support bracket to hold them in place and look clean, like no big metal straps bolted to the frame etc.
    With that amount of length, they're going to have to bolt up some where down stream of the flange at the head.
    Also, depending on the material you choose, they're going to be heavy.
     
  3. Altus

    Altus Active Member

    Messages:
    1,489
    Likes Received:
    4
    Trophy Points:
    38
    Location:
    London, Ontario
    Well - it will work, but it may require some carburetor work to make it run properly after -- as long as you're ready for it. You're also going to be losing the scavenging and 'pumping' action that's gained by connecting the exhausts together.

    Now - you will need to figure out how to keep the exhaust hot enough to get out the ends of those long pipes -- so you'll want to be wrapping at least the first half of each, unless you're using double-wall pipe -- come to think of it, even then you might want to wrap.
     
  4. TIMEtoRIDE

    TIMEtoRIDE Active Member

    Messages:
    4,686
    Likes Received:
    11
    Trophy Points:
    38
    Location:
    Clermont FL near Orlando
    Kevin11 runs 4 individual pipes (kicked up) and claims no problems - - even has a video proving it.

    http://www.youtube.com/watch?v=K23pNFxGWkE

    I would "hide" 4-8 stainless scrubbies in the pipes to at least cut some noise.
     
  5. BillB

    BillB Active Member

    Messages:
    1,091
    Likes Received:
    1
    Trophy Points:
    38
    Location:
    Tulsa Oklahoma
    ^^^^ that bike sounds so damned good
     
  6. i_am_the_koi

    i_am_the_koi Member

    Messages:
    195
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Napa, CA
    yes, yes it does
     
  7. parts

    parts Member

    Messages:
    834
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    prescott valley az
    +1 on the scrubbies. I've used brass scrub pads in the screamin
    eagles to reduce the harshness. So far no more then two at
    a time with a 2" (5/8" hole) washer hose clamped at the end of the pipe.
    Not only does it reduce noise but I regained some of the power
    lossed from the single baffle of the pipes.
    I once tried a stainless pad sandwiched between two brassies, but
    the power deminished along with most of the sound.
     
  8. PainterD

    PainterD Active Member

    Messages:
    2,649
    Likes Received:
    4
    Trophy Points:
    38
    Location:
    St. Cloud, Minnesota
    You will have to do some fancy bending if you want to keep the use of the center stand (which I find comes in handy for servicing the bike)
    I suspect the sound is over whelming with 4 straight pipes and baffles in each one would make it sound and run better I suspect.
    I like the idea and the looks of 4 separate pipes. Please keep us posted on your fabrication and post some photos as you go. Thanks!
     
  9. kevineleven

    kevineleven Member

    Messages:
    800
    Likes Received:
    8
    Trophy Points:
    18
    Location:
    Columbus, Ohio
    Yeh I use my center stand for maintenance and storing through the winter. The pipes are in the way for sure. While I agree the bike is loud, It's not really overwhelming to me especially with a helmet on. A lot quieter than some V-Twins rolling around out there.
     
  10. PainterD

    PainterD Active Member

    Messages:
    2,649
    Likes Received:
    4
    Trophy Points:
    38
    Location:
    St. Cloud, Minnesota
    I'm with on that one Kevineleven,
    Ilive next door to a Harley dealer and they must've had a sale on straight pipes! Sometimes the dishes in the cupboard rattle.
     
  11. kevineleven

    kevineleven Member

    Messages:
    800
    Likes Received:
    8
    Trophy Points:
    18
    Location:
    Columbus, Ohio
    If anyone is interested, I'm gonna rework my XJ again relatively soon and put it up for sale once the weather breaks.
     
  12. padre

    padre Member

    Messages:
    233
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Lawton, Oklahoma
    The effiencies of exhaust changes are not a perfect science, jetting changes for example for example, the richer the the deeper and melow, the leaner he more backrap. Scavenger cones can be used to adjust the powerband. A nice sounding se of pipes can cost you mpg and horespower. Depending on jeting, restriction in the exhaust w/lean jetting can acualy increase torque a lowr rpm's a the cost of high rpm HP.
    What is your4 prioity7
     
  13. CutandWeld

    CutandWeld New Member

    Messages:
    15
    Likes Received:
    0
    Trophy Points:
    1
    Does anyone know what he's using for jets? (guy in the vid)
     
  14. PainterD

    PainterD Active Member

    Messages:
    2,649
    Likes Received:
    4
    Trophy Points:
    38
    Location:
    St. Cloud, Minnesota
    Cutand weld,
    Just PM Kevinelevin and I'm sure he'll give you the info you need.
     
  15. Imthatdude

    Imthatdude New Member

    Messages:
    13
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    Philly
    I'm seriously curious about this "scrubbies" trick...
    I have an exhaust on the same lines as kev11.
    Only, 4 into 2, 1 on each side guided around ammo can saddle bags.
    (haven't quite figured out loading pics yet)
    carbs have pods, no jetting.
    Sounds great, runs great...(as close to perfect as it can be for my blood)
    But....they SCREAM...!
    Which, I don't mind in the fast pace sideways of Philly.
    Taking a road trip soon and considering the "scrubbies" for the long, solid 5th gear highway mode....
    Who here has this "installed" and how do you like it?
    Any thoughts...??

    Thanks....
     
  16. TIMEtoRIDE

    TIMEtoRIDE Active Member

    Messages:
    4,686
    Likes Received:
    11
    Trophy Points:
    38
    Location:
    Clermont FL near Orlando
    In my opinion, the scrubbies, or other restrictions need to be a couple feet upstream from the tip, so the sound can re-form as a low tone in the open exhaust tube. A restriction at the very tip leads to a buzzy, raspy note. Longer pipes, or larger diameter make lower tones.
     
  17. Ledicott96

    Ledicott96 Member

    Messages:
    346
    Likes Received:
    1
    Trophy Points:
    16
    Location:
    North west England
  18. PainterD

    PainterD Active Member

    Messages:
    2,649
    Likes Received:
    4
    Trophy Points:
    38
    Location:
    St. Cloud, Minnesota
    Check around at different sites/stores. Those shorty mufflers go for as little at $19-$20 each I've noticed.
     
  19. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,843
    Likes Received:
    66
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    I went to the local Harley-Davidson dealership, to speak to the parts representative about what I have heard some people call: “Take offs”.
    These are Harley-Davidson parts, that have been taken off a brand-new bike, and replaced with aftermarket performance equipment.
    I had heard that these parts called takeoffs, are available to be purchased as used parts. I was primarily interested in a pair of Harley-Davidson Sportster silencers.
    The nice fellow working the parts counter told me, a lot of people stop in and ask about mufflers and shocks, and he has to tell them all the same thing, that Harley-Davidson doesn't sell the parts it takes off from customers and motorcycles and sell them to the public.

    unbelievably, he told me that actually what they do do with these parts, is to bring them out back and destroy them!

    I'm really not sure if that's what they do, or because I rode in on a Jap bike, I was getting my chain yanked by this guy. .
     
  20. Gator8

    Gator8 Member

    Messages:
    34
    Likes Received:
    0
    Trophy Points:
    6
    I hate starting new threads when one is already going, I realize might not be the same situation, but still I have a question.

    Anyway my xj700 has some aftermarket pipes 4-2 and the mufflers were shot, so I took them off during my current rebuild, now looking around I'm finding a challenge to find something that fits....the outlet is 2 inch od and everywhere I look I only find 1-3/4...just wondering if anyone has any idea if I'm just measuring od when I should be lookin at id?

    Pretty sure I'm right, thing is I don't really want to dish out anymore than I need to....was wanting something more like a sporty has..straight out..but believe the sizing to be an issue...guess I could cut the pipes closer to the header as it appear a bit smaller closer to the motor.

    Ideas?
     
  21. Maxim-X

    Maxim-X Well-Known Member

    Messages:
    1,696
    Likes Received:
    76
    Trophy Points:
    48
    Location:
    London Ontario Canada
  22. kevineleven

    kevineleven Member

    Messages:
    800
    Likes Received:
    8
    Trophy Points:
    18
    Location:
    Columbus, Ohio
    BEWARE!!! These are not stock Yamaha equipment! You surely are playing with fire trying to out think the engineers at Yamaha. Your probably going to get into the nightmare of carb issues, probably need to rejet. I'd suggest keeping the bike in it's intended configuration.
     
  23. Hillsy

    Hillsy Member

    Messages:
    634
    Likes Received:
    12
    Trophy Points:
    18
    Location:
    Australia
    :lol:
     
  24. day7a1

    day7a1 Member

    Messages:
    623
    Likes Received:
    6
    Trophy Points:
    18
    Location:
    San Diego, CA
    My local harley shop has a "swap meet", and it is confirmed by a VERY knowledgeable source that they will resell parts that aren't picked up by the customer.

    My dad's harley is one that wasn't picked up by the customer, talk about cheap! If my dad bought a Harley you know it's a good deal.
     
  25. Hillsy

    Hillsy Member

    Messages:
    634
    Likes Received:
    12
    Trophy Points:
    18
    Location:
    Australia
    So your dad bought a Harley that was paid for but wasn't picked up by a customer?

    Who in hell buys a bike then doesn't pick it up??
     
  26. day7a1

    day7a1 Member

    Messages:
    623
    Likes Received:
    6
    Trophy Points:
    18
    Location:
    San Diego, CA
    Just ordered, overstock. Not paid for...but maybe the dude died or something, I don't know.
     
  27. BillB

    BillB Active Member

    Messages:
    1,091
    Likes Received:
    1
    Trophy Points:
    38
    Location:
    Tulsa Oklahoma

    Got to be a typo. I belly laughed on the very last comment!!!!
     
  28. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,843
    Likes Received:
    66
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    The Harley Sportster Silencers aren't for me.
    Are you kidding me?

    I'd mine ore for raw materials to be used in making genuine parts before hanging a Harley Part on my YAMAHA.
     
  29. Bobe7316

    Bobe7316 Member

    Messages:
    132
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Tasmania Australia
    Yes dont put inferior parts on your XJs.
     
  30. SKRAM

    SKRAM Member

    Messages:
    43
    Likes Received:
    0
    Trophy Points:
    6
    Location:
    NY/VT border
    Back to Gator8's question...does anyone know the actual od and id dimensions. I have stalled on my project due to time..but before cutting up my exhaust and then buying pipes..does anyone actually know the dimensions of the stock pipes. This way I can buy pipes then commence the destruction. I almost wanna say the fat boy mufflers I put on slipped right over the stock pipes on my 7oo. I just removed the OE mufflers and slipped the fat boys right on over the pipe..and I almost wanna say it was 1 3/4 id on those Harley pipes...could be mistaken though.. anyone?
     
  31. Ledicott96

    Ledicott96 Member

    Messages:
    346
    Likes Received:
    1
    Trophy Points:
    16
    Location:
    North west England
    That’s in dollars thought im from the UK so can not by anything out of the country. Even if I did id have to pay hellish import tax.
     
  32. -Azrael-

    -Azrael- Member

    Messages:
    167
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    Vancouver, Canada
    Assuming your dealers down south are the same as up here he is not yanking your chain.
    I work for a multi line dealer and all of our brands have told us that take offs are not for re-sale. Officially they are to be destroyed if the customer does not want his stock parts. Same with insurance jobs.. Though my bike is at least 20% other bike take offs... so the rules are bent sometimes...

    Best luck for the public is custom shops. They have no dealer agreement and see all kind of stock parts going to the dumpster...

    Cheers
    Dave
     
  33. Ledicott96

    Ledicott96 Member

    Messages:
    346
    Likes Received:
    1
    Trophy Points:
    16
    Location:
    North west England
  34. PainterD

    PainterD Active Member

    Messages:
    2,649
    Likes Received:
    4
    Trophy Points:
    38
    Location:
    St. Cloud, Minnesota
    Actually the Harley mufflers are alot better quality than the OEM mufflers that come on these bike by far. The chrome is very good quality also. I don't think you will have to worry about them rusting out for a long time.
    The inside diameter of my mufflers (Harley) is 1-3/4" and fit right onto the stock collector.
     

Share This Page