KTM 690 enduro/SMC exhaust thread

Discussion in 'Thumpers' started by greengoose, Jul 20, 2008.

  1. woodsrider

    woodsrider .........................

    Joined:
    Nov 22, 2003
    Oddometer:
    587
    Location:
    Colorful Colorado
    Same experience here, Johnnie -- the sound is similar to the 950 with Akras. Definitely louder than stock but, as you point out, the stock muffler is EXTREMELY quiet. The sound is not objectionable, especially at lighter throttle levels. I'm also going to hold off on the EFI remap....sometimes it's best to "leave well enough alone..."
    #21
  2. mfaoro

    mfaoro Been here awhile

    Joined:
    May 29, 2008
    Oddometer:
    177
    Location:
    the Cascade foothills, WA USA
    Cool - thanks. I just want to make sure I am still legal on fire roads and such.
    #22
  3. fast4d

    fast4d Long timer

    Joined:
    Jul 27, 2007
    Oddometer:
    2,772
    Location:
    Los Angeles, CA
    the akra can be very loud when you're on the throttle.

    idling and creeping in/out of your neighborhood it's quiet.


    BTW, take that baffle out! unless you need that spark arrestor.
    #23
  4. mfaoro

    mfaoro Been here awhile

    Joined:
    May 29, 2008
    Oddometer:
    177
    Location:
    the Cascade foothills, WA USA
    I guess my question still stands then. Does it meet the 96db requirements for forest service roads? I cant find anything anywhere to tell me this...Akra's website sucks

    I assume that its in the same ballpark as the FMF and the Wings which I understand to meet the db requirements. Never had an Akra so I dont know if its different from those others in terms of noise.


    Another question. I understand that a remap is not required for these slips ons. Is there a risk (other than to your wallet) if you did get it done? I cant quite tell from the posts above.
    #24
  5. RYDMOTO

    RYDMOTO n00b

    Joined:
    Aug 27, 2007
    Oddometer:
    3
    I am sending my silencer to Thunder Alley first thing in the morning.He asked me to send the headpipe too so he can make a template of it to have on file.
    Although he said I don't need a headpipe from him I am doing him that favor.
    He did say he got 10 extra horsepower out of his full on sytem but it is very loud and for competition only.He is a firm believer of the reverse cone type silencer of which he said fourstrokes love to have.He is a skilled craftsman and hand makes everything.I asked him to add a downspigot to the silencer to direct the exhaust away from the turn signal.I will keep you guys posted on the results.If any of you are interested give him a call.He is only charging me $175.00 but that might be because I am sending my header pipe too.

    Thunder Alley
    1010 East Lacey Boulevard
    Hanford, California 93230
    (559) 584-8109
    #25
  6. trailtrick

    trailtrick goat trail rider

    Joined:
    May 14, 2008
    Oddometer:
    3,344
    Location:
    socal
    I modified a yoshimura for a 525 exc and its good, 35- % louder ,its blows 95 decibels @3800 rpm in my decibel meter ,but its loud over 5500 rpm ,got lots o good power with it ,stock was 82 @3800 rpm but the heat was the major change
    #26
  7. bigborefan

    bigborefan Making new friends

    Joined:
    Jul 15, 2007
    Oddometer:
    2,167
    Location:
    USA - Midwest, Central Illinois

    Is he building you a muffler, or modifying your stocker?
    #27
  8. woodsrider

    woodsrider .........................

    Joined:
    Nov 22, 2003
    Oddometer:
    587
    Location:
    Colorful Colorado
    Hmmm.....

    More sound = less ground.

    Let's all leave those baffles in, please. Loud bikes are one of offroading's biggest enemies and one of the quickest ways to get our favorite trails closed to OHVs for good!

    Let's keep 'em quiet!
    #28
  9. Motobrandt

    Motobrandt Free Opinions Here

    Joined:
    Sep 13, 2002
    Oddometer:
    630
    Location:
    Los Angeles
    Amen Woody! :clap
    #29
  10. FriedDuck

    FriedDuck Why die all tensed up?

    Joined:
    Jun 6, 2004
    Oddometer:
    484
    Location:
    Atlanta, GA
    +1

    Talking to guys around georgia we've lost a TON of ground over the last few years.
    #30
  11. fast4d

    fast4d Long timer

    Joined:
    Jul 27, 2007
    Oddometer:
    2,772
    Location:
    Los Angeles, CA
    there's something etched into the can on the inside face about meeting US forest service standard. I'll try to remember to take picture for you.
    #31
  12. RYDMOTO

    RYDMOTO n00b

    Joined:
    Aug 27, 2007
    Oddometer:
    3
    He is modifying the stocker.Sorry for not makining that clear.Although Bob can build you a new muffler,I decided on keeping mine.
    #32
  13. Renazco

    Renazco Formerly AKA Boejangles

    Joined:
    Apr 17, 2003
    Oddometer:
    4,746
    Location:
    Santa Rosa, Ca.
    The stock barbeque grill they call a muffler drove me insane so I fabed an old RFS Leo Vince pipe to take care of that issue.
    $10 at a muffler shop and they made me a small insert for the midpipe, works good!

    The header you see is Ti but the stocker is the same configuration.
    I started the bike and let it go through it's phaze and after a couple of minutes it idled nicely, eventually I'll get this mapped but it works great for now.

    [​IMG]

    [​IMG]
    #33
  14. DirtJack

    DirtJack Adventurer

    Joined:
    Aug 12, 2007
    Oddometer:
    2,295
    Location:
    San Antonio, Texas
    Does your Ti header have a mount for the lambda sensor?
    #34
  15. Renazco

    Renazco Formerly AKA Boejangles

    Joined:
    Apr 17, 2003
    Oddometer:
    4,746
    Location:
    Santa Rosa, Ca.

    Yes it does, this is the Akra header and they designed it to retrofit with all OEM parts.
    #35
  16. trailtrick

    trailtrick goat trail rider

    Joined:
    May 14, 2008
    Oddometer:
    3,344
    Location:
    socal
    james how loud it is ???
    #36
  17. crankshaft

    crankshaft Guns are for pussies

    Joined:
    Aug 12, 2004
    Oddometer:
    14,024
    Location:
    Burlingtron,VT
    I'm getting ready to haul my 690 to the fab shop for my Supertrapp install.
    I'll shoot some pics and a vid when I get it back home tonight.

    I rode it last night with only shorts on and that pipe gets hot:lol3
    #37
  18. Renazco

    Renazco Formerly AKA Boejangles

    Joined:
    Apr 17, 2003
    Oddometer:
    4,746
    Location:
    Santa Rosa, Ca.
    It's loud, sounds like a Rallye race bike but I love the sound. I'm putting a 94 DB insert with spark arrestor today so this should develop a little back pressure and quiet it down some.

    I noticed my bike is cutting off at idle and really low decel so it's probably very lean, I guess mapping should cure this. I'm really green with EFI.
    #38
  19. trailtrick

    trailtrick goat trail rider

    Joined:
    May 14, 2008
    Oddometer:
    3,344
    Location:
    socal
    I modified a yoshimura from a rfs and its to loud for my taste ,over 5000 rpm barks to loud and i like the hold it for long period o times ,BTW were you got the header ???
    #39
  20. crankshaft

    crankshaft Guns are for pussies

    Joined:
    Aug 12, 2004
    Oddometer:
    14,024
    Location:
    Burlingtron,VT
    I just got back from the fab shop. The results are excellent and the sound is perfect. At idle, its pretty quite but when you get on it.... well it barks:lol3

    I'll post up a pic in a few hours.
    #40