F800GS aftermarket exhaust

Discussion in 'Parallel Universe' started by Bike4Fun, Nov 21, 2008.

  1. AngryRed

    AngryRed Lost in Cyber Space

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    +1 I'd also like to dump my cat as well as getting a new silencer. Most posts I've read have issues matching up headers though right? I've also read issues with skid plates not fitting right with the Remus header which I still can't find.

    :ear
    #21
  2. jessehere

    jessehere Ridin'

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    [​IMG]

    here ya go
    http://www.remususa.com/epages/remus.sf/en_US/?ObjectPath=/Shops/remus/Products/F800GS_RevolutionFS/SubProducts/F800GS_Revolution_Full_System_%238802085208FS

    or last item on this page

    http://www.motorsports-network.com/cgi-bin/dbsearch.exe?mdb=/remus.mdb,tbl=data1,dbtype=2000,template=/dbcart3/returnre.htm,DB_brand=bmw9

    wonder if the header fits with the BMW bashplate???
    #22
  3. Mal_B

    Mal_B Adventurer

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    From what I've heard: I doubt it. I can tell you definitely on Saturday when I put mine on.

    mal
    #23
  4. AngryRed

    AngryRed Lost in Cyber Space

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    Please let us know.
    #24
  5. sgopher185

    sgopher185 Been here awhile

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    +1.

    And don't forgot the pics :D
    #25
  6. Bike4Fun

    Bike4Fun Smooth IS Fast

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    "2009 BMW F800GS (the Dewalt special)" :rofl
    #26
  7. Mal_B

    Mal_B Adventurer

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    No it does not.

    The Remus headers are much larger in diameter than the standard ones and they run lower along the side of the bike. The BMW bashplate looks like it needs to hang somewhere between 1-2cm lower than it does.

    The Remus headers also fouled my SW-Motech crash bars. The brace between the two bars touches one of the pipes not far from the manifold.

    In any case, they're not coming off. I've spaced out the crash bars and managed to get at least some horizontal support. I'm sure I'll find something to get the bashplate on and I don't mind losing a little ground clearance.

    Because, you see the Remus headers are way cool. I also removed the inner baffle from the Akrapovic slip-on and the bike finally sounds like it means business. It has a real sweet note when on the gas and is performing noticably stronger all through the rev range. I'm sure the bike is running lean and I plan on getting it properly tuned but it still is going far better than before. Incredibly, it is still reasonably quiet at idle - still quiet enough for it to be warmed up in a a suburban street without any fuss.

    The cat seems to do a lot of muffling on this bike. We started the bike without a muffler on both the stock and Remus headers and the stock header almost soundd like it had a muffler on it compare to the Remus.

    If, or hopefully when I solve the bashplate issue I'll report back.

    mal
    #27
  8. MoToad

    MoToad Been here awhile

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    Interesting. My stock exhaust looks and sounds great. Can't see why I'd want to dick around with it.
    #28
  9. MonsterJ

    MonsterJ I have motopsychosis

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    Anyone pick up the Remus Hexacone yet?
    #29
  10. drehwurm

    drehwurm n00b

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    Well, it can be made to!

    Question is, do you really want to go through all the hassle? The BMW bashplate is more a debris-protector and any major blow will heavily deform/damage it. It is too thin, the brackets are riveted on and the welds are brittle and not very exact - it is nice looking though. The Remus headers give some extra mid to top, but don't do anything for offroad except for loosing 30mm of ground clearance.

    If you still want to do it, here is what you are facing:

    .) you need to space out the bashplate by 30mm in the front and 28mm in the back vertically.

    .) as the big change in height also changes the position horizontally , you need to relocate the brackets to the front. Fortunately if you move the rear rivet-location in the bracket to the former front rivet location it is a perfect fit. Just drill a new hole for the front rivet in the bash plate. Enlarge the access holes for mounting.

    .) space out and relocate the front mounting bracket.

    .) do some bending and shortening as you like/need to.

    I would recommend to use the stock rubber mounting blocks as those are a predetermined breaking point. Also I re-welded all the welds since the original ones were nice-looking but crap!!!

    [​IMG]

    [​IMG]
    [​IMG]


    [​IMG]
    #30
  11. Mal_B

    Mal_B Adventurer

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    Mate,

    Some fantastic info there - looks like you've done your homework and I'll follow your instructions and see how I go.
    Yes I do. I love the way the bike sounds and goes now and although I don't wish to reduce my ground clearance particularly this is not the sort of bike I expect to be casing out all that often. The main reason I want the bashplate back on is to protect the headers from debris and to handle the 'once in a blue moon' log crossing I'll have to make.

    Thanks again mate - this info has made my life a lot easier.

    Cheers,

    mal
    #31
  12. Mal_B

    Mal_B Adventurer

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    Each to his own - if you like it, then don't change it. The only reason I posted this up was because people asked!

    mal
    #32
  13. drehwurm

    drehwurm n00b

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    Glad I could be of some help. You will have a tough time removing the stock rubber blocks as it is very hard to get a grip on them without twisting or destroying those. I used a long 21mm socket with a sharp edge (turn it down on a lathe) and lots of patience. Spacers for the front bracket are 13mm long on my setup.

    Michael
    #33
  14. Desert Dave

    Desert Dave Enjoying the moment

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    I think it's a bit more than a debris protector, and I can tell you that ANY major blow won't deform it. Last week I cased it going up a piece of granite slab so hard it stopped me dead in my tracks, and it just left the typical scuff marks like you see on any skid plate. I hope I don't hit it much harder than that, so I'd say it does it's job.

    I do agree that the rivets are cheesy and I'll keep an eye on that, but so far it's the only skid plate I've seen that goes back as far as it does and covers the cat at least halfway, and it mates with the centerstand skid plate better than others I've seen, so for that reason I'll keep this plate over most aftermarket who don't seem to find that important. What good does it do to slide over a jagged rock only to catch on the cat/exhaust?. I'll take your word for it on the welds an may look into getting mine beefed up some.

    I'm interested in the headers for all of the above reasons, and for now I'd prefer to stick with the stock can. Mainly I'd like to lose the cat just for the fire danger where I ride. I appreciate your insight into what it will take to modify the plate. I don't think I'm willing to lose 30 mm of ground clearance though, so you just saved me a bunch of time!:D
    #34
  15. drehwurm

    drehwurm n00b

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    That's good news! Makes me feel more comfortable and it good to see that the work was not spent for naught.

    Michael
    #35
  16. Fireman

    Fireman Shazaam!

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    This might sound funny, but can anyone compare a F800gs aftermarket exhaust to any existing bike sounds? For instance, "the hexacone on a GS sounds like a Yamaha XS650 with dual Cobras". I've heard a LOT of bikes with a lot of pipes (rhymes), but I cannot imagine what kind of sound might come out of the GS. Can anyone help? Can anyone at least tell me it doesn't sound like a chainsaw?:D
    #36
  17. drehwurm

    drehwurm n00b

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    I do have the Hexacone with the insert and the Remus headers w/o cat. Actually the bikes sounds more quiet at idle/low RPMs than with the stock exhaust, but once you get into the mid/upper RPMs the sound really picks up. I've got some compliments already as the sound gets really "racy" up in the revs. Not like a Ducati twin or the Japanese inline 4s, but more like a race car or Ferrari :eek1 My first impression would have been that it sounds a bit "raspy", but by now I can't get enough of it :wink:

    Just my very subjective 2 cent ...

    Michael
    #37
  18. Fireman

    Fireman Shazaam!

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    Thanks for the reply, Drehwurm. That's kind of what I was looking for. For the record, I don't need any more power, and I don't care whether the Exahust is any louder. The thing that annoys me about the stock exhaust is the complete lack of deep tone. By 60mph, I can barely hear those 400cc cyclinders thumping under me, and I miss it. Some people said the hexacone was a deeper tone and that madce me hopeful. I like the price, too, compared to BMW's Akra. Think the Remus headers make the tone deeper or louder or both?
    #38
  19. drehwurm

    drehwurm n00b

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    Akrapovic makes great products, but IMO they have become overpriced by now. The Remus is on the same level regarding quality and attention to detail with a much better price - I was really impressed by this system! Well, if it has a "deeper tone" is hard to judge - very personal impressions. I'd say the engine has a very distinctive sound, but IMO a Ducati would have a "deep tone" to it, not the F800. It may be different with the insert removed, but I have no intention to do so. For me the open headers and Hexacone are a good compromise in every regard. Nonetheless, the stock exhaust does have a surprisingly good sound for a legal bike over here - our (European) stock exhausts may be different to yours though. The Remus Hexacone with insert is street legal here also, but the headers naturally aren't.

    Michael
    #39
  20. cwthewhale

    cwthewhale Charlie

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    I'm lovin this 800GS, had a Remus for the '03 1150GS, but I like the stock exhaust note on the 800. Very cool new ride!!! Can't wait for summer in Idaho!!!
    BMW large handguards with spoiler still not enough protection in cold. Even with grip heaters on high!
    Anyone know if touratech or anyone makes bigger plastic parts that will work with the BMW metal hand guards???
    #40