1. 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
    TE = 4st Enduro & TC = 4st Cross

Poll - 449/511 EFI butterfly removal

Discussion in '4 Stroke' started by Motosportz, Apr 21, 2014.

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449/511 EFI butterfly removal

Did it, love it 50 vote(s) 51.5%
Did it, did not work 2 vote(s) 2.1%
Going to do it 29 vote(s) 29.9%
Not going to do it 16 vote(s) 16.5%
  1. Dangermouse449 Husqvarna
    Pro Class

    Location:
    Sunshine Coast QLD Australia
    Husqvarna Motorcycle:
    2011 TE449
    Other Motorcycles:
    2009 CRF450R 2000 YZ125
    Ha ha, cool. :)

    A motorbike mechanic mate of mine has an funny saying he rolled out when I told him about mine.
    'Parts removed cost nothing & cause no problems'!

    Meant to be 'tongue in cheek' but might be true in this case I think.
    9880sts likes this.
  2. Radar Husqvarna
    Pro Class

    Location:
    Southern Nevada
    Husqvarna Motorcycle:
    2012 TE449
    I removed the fly by wire butterfly from my 2012 TE449, now my throttle has no brain I get to do it myself. I like it! The bike has much improved throttle response and it seams to start faster, no waiting for the computer to make up its mind.

    I am concerned that my bike may be emitting more carbon.
    So I am going to stop eating beans in order to limit my methane output.
    This should keep my carbon footprint at about a size 9.5.

    :rolleyes:
  3. Dangermouse449 Husqvarna
    Pro Class

    Location:
    Sunshine Coast QLD Australia
    Husqvarna Motorcycle:
    2011 TE449
    Other Motorcycles:
    2009 CRF450R 2000 YZ125
    Ha ha ha.
    I had concerns too, Radar!
    I have planted some thyme in the garden , so I'll reduce my carbon footprint AND have more thyme to ride!!
    :)
    Mr Ford40 likes this.
  4. DErZ Husqvarna
    A Class

    Location:
    Fetcham, Surrey, UK
    Husqvarna Motorcycle:
    511 SMR
    Other Motorcycles:
    Yamaha R1 5VY
    I had a custom map on my 511 SMR (PCV) but I still had the occasional flame out, now my flame outs may be different to everyone elses. I never got flame outs straight off the throttle but I would get countless flame outs/dead throttles when I was clutching up wheelies. Since removing the 2nd butterfly I havent had a single flame out :)
    Dangermouse449 and Motosportz like this.
  5. Dangermouse449 Husqvarna
    Pro Class

    Location:
    Sunshine Coast QLD Australia
    Husqvarna Motorcycle:
    2011 TE449
    Other Motorcycles:
    2009 CRF450R 2000 YZ125
    The 'dead throttle' is the second throttle not opening up.
    Can't happen if the butterfly isn't there!
    Awesome dude, glad it is working for you :)

    Don't forget to cast a vote in the poll.
    DErZ likes this.
  6. tjb45 Husqvarna
    A Class

    Husqvarna Motorcycle:
    TE511
    Pull the EFI butterfly out of mine last weekend. Cant say I really noticed more power or power delivery, but it has 100% removed the dead throttle problem, which is what I was chasing.

    I did wind my Air bypass back in about 1/2 a turn (was out 5 3/4) thinking I could run it a little less, but found my flame outs came back on tight single trails. Move it back to 5 3/4 turns and no flame outs, and now no dead throttle. You could say its "like a new bike should be".....

    Bike is 2013 TE 511, Map 3, Australian delivered with RACE MAP II.
  7. Dangermouse449 Husqvarna
    Pro Class

    Location:
    Sunshine Coast QLD Australia
    Husqvarna Motorcycle:
    2011 TE449
    Other Motorcycles:
    2009 CRF450R 2000 YZ125
    Cool. Yep, FBW throtte can't be 'dead' if it isn't there! :)

    So it wasn't snappier down low for you, as in quicker to respond?
    Removing the butterfly doesn't make more power outright, it'll be the same, but certainly made my bike snap like it should be when cracked open, not doughy.
    :)
  8. F1000 Husqvarna
    A Class

    Husqvarna Motorcycle:
    2013 TE449
    Other Motorcycles:
    KDX 220 Trident T150V TTR125L
    Pulled the butterfly today. My bike has map3 and fmf power core. I did not adjust the TPS or idle. It ran good before the removal and better after. With these 3 mods the bike runs strong. One of the best changes is hot starting. I was having difficulty with that. If I added a little throttle it did not help. Now I can add a touch of throttle and it fire right up. Doesn't seem to make much sense with the fbw butterfly being open a bit, but it did make a difference. From the bike purchased to now is night and day improvement.
    Dangermouse449 and 9880sts like this.
  9. MarkJ Husqvarna
    B Class

    Husqvarna Motorcycle:
    WR250, TE449
    Rode my TE449 last weekend with butterfly and engine brake stud removed. Heaps more fun to ride now. Much more responsive, I love it.
    Dangermouse449 likes this.
  10. Dangermouse449 Husqvarna
    Pro Class

    Location:
    Sunshine Coast QLD Australia
    Husqvarna Motorcycle:
    2011 TE449
    Other Motorcycles:
    2009 CRF450R 2000 YZ125
    The way they should be! :)
  11. Motosportz CH Sponsor

    Location:
    Vancouver WA
    Husqvarna Motorcycle:
    2021 TE250i, 570 Berg, 500 KTM, 790R
    Other Motorcycles:
    many
    I put a full free flowing FMF on mine yesterday. Still runs very good and has more power. I know some guys that ran the FMF and removed the BF had some bog issues. Not mine. It does pop on decel so will JD that out.

    [IMG]
    9880sts and Dangermouse449 like this.
  12. JamieHC Husqvarna
    A Class

    Location:
    Melbourne, Australia
    Husqvarna Motorcycle:
    TE511
    Hey Motosportz, did you break off the clutch bleed nipple too?
  13. Motosportz CH Sponsor

    Location:
    Vancouver WA
    Husqvarna Motorcycle:
    2021 TE250i, 570 Berg, 500 KTM, 790R
    Other Motorcycles:
    many

    yup about third ride. :D Clutch has never needed any service and works beautifully.
  14. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    OKAY...finally carved some time to mess with the 449 this weekend and was contemlpating the BF removal (though I only have hot start problems on occasion) so I came back to this thread and reviewed/caught up with the progress.

    Searched this thread, then forum, then the entire site for more info on this engine braking stud removal. WTF???? Anybody got something to point me in the right direction? Pics? Bueller? I'm about ready to start making my eyes bleed in the repair manual just to find it. The things I see about grinding/punching out a pin make me think this is not something easily reversed like just taking off a couple of screws for the plate.

    Then again maybe I'll just do an oil change and go for a ride. Still messing with my JD - only 2 rides on it so far. I don't do more than one mod at a time. The engineer in me won't let me sleep if I do! :eek:
  15. Motosportz CH Sponsor

    Location:
    Vancouver WA
    Husqvarna Motorcycle:
    2021 TE250i, 570 Berg, 500 KTM, 790R
    Other Motorcycles:
    many
    Dangermouse449 likes this.
  16. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    Thanks Kelly. So just to be clear, both mods are required? I've never had a hanging throttle issue before. Perhaps I should take out the BF, then test?

    My ECU map is the locked kind and I'm one of the lucky ones who hasn't had the nasty flame outs and dead throttle stuff. I think the throttle has only gone dumb once and its never done it again after the JD. I agree with you that making it too rich on the lower settings with the fueler does more harm than good. I found the point where a quick whack of throttle would kill it and leaned slowly to where I've got it set now.

    Jeez maybe I'll even get a pipe some day...
    danny318 likes this.
  17. danny318 ___________

    Location:
    MA
    Husqvarna Motorcycle:
    '13 TE449
    Other Motorcycles:
    TTR230, '72 CT90
    You do not have to remove the throttle stud. You can just do the butterfly first and see how that is. Removing the throttle stud gives you lots of engine braking and prevents 'hanging idle'. I believe Kelly just did the butterfly and not the stud.
  18. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    Gracias! Gotta do some chores today first, hoping for a nice maintenance evening whilst smoking a nice pork shoulder. Cold beer, fresh oil and butterfly removal. Then hopefully a day in Gorman to check my work Sunday!
    Dangermouse449 and danny318 like this.
  19. Dangermouse449 Husqvarna
    Pro Class

    Location:
    Sunshine Coast QLD Australia
    Husqvarna Motorcycle:
    2011 TE449
    Other Motorcycles:
    2009 CRF450R 2000 YZ125
    The guys are correct. You can do just the butterfly & have a have a test from there. Even if it needs a little tweak on the JD, I think you'll be surprised by the results. I still have my butterfly......in a bag! :)
    It won't ever be going back in ha ha.
  20. James Patton Husqvarna
    AA Class

    Location:
    Edwardsville, ILL
    Husqvarna Motorcycle:
    TE511 2012, WR125 2006
    Other Motorcycles:
    1250S Bandit, DRZ400S
    I remember many years ago, removing secondary butterflies on a GSXR1000, and it was very effective.
    Suzuki, and yamaha had those secondarys on their superbikes, I think to give smoother throttle response,
    and maybe to keep the newbies from flipping them over, LOL!