WUMPA - my DMC Dauntless 1150GS Adventure rig

Discussion in 'Hacks' started by DRONE, Apr 26, 2011.

  1. davebig

    davebig Another Angry Hun !

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    \
    KCdakar
    I just put a 34/11 on my GSA I now have an extra 33/11 that was on it, it has a leaking seal but I can change that, it's an abs model has a hole for Claudes swaybar mount 4k rpm in 6th is 61 mph with 175/65/15 rear tire, not very many 34/11 with abs as they where an R1100rs early gear set. PM if you have any interest.DB
  2. rg sw wa.

    rg sw wa. Been here awhile

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  3. davebig

    davebig Another Angry Hun !

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    I've seen it and it's for the easy part of it, the hard bit is setting pinion depth where the drive is assembled with machinist blue on teeth and after turning it over one disassembles check and adjusts and does it again till tooth pattern is in center of ring shimming the crown bearing is the easy bit,as in the video.DB

    Searched a little and found these :http://www.drivetrain.com/parts_catalog/ring_and_pinions/ring_and_pinion_installation_instructions.html
    And my favorite BMW mechanics description of the how and why, I believe BMWs flat rate manual calls for 5 hrs to correctly setup a final drive, starting from scratch with a fresh set of gears.
    http://www.bmwra.org/otl/finaldrive/
  4. KCDakar

    KCDakar What are we waiting for?

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    I sent you a PM before I saw this post davebig. We can carry on there...
  5. davebig

    davebig Another Angry Hun !

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    OK Drone it's time now you've been up and down the hwy,off pavement surely you have an opinion on the 34/11 ? Not to mention you helped Gypsywriter with a stock geared GSA.Have I led you astray ?
    In my preferred riding area Mississippi River valley it works well for me.DB
  6. DRONE

    DRONE Dog Chauffeur

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    OK. So . . .

    On pavement

    1. great acceleration from a dead stop (cool!)
    2. 1st gear chudder from my sintered clutch markedly reduced
    3. 3rd gear used to be my "around town" gear--now it's 4th
    4. very weird (WTF!) shifting into 5th at FORTY-SEVEN MPH!!!
    5. 6th--the rig is no longer happy at 70-75 mph. Motor sounds like it's over-revved for steady cruising. I got no problem accelerating through 7000 or 7500, but I just don't like holding steady at anything higher than 5500rpm. It feels like I need to shift into 7th. (What? There is no 7th? Can I get one somewhere for cheap?)
    However, this means I tend to cruise the slab at 60-65mph which can be argued as a good thing. From a safety standpoint maybe 65mph is a more safe and sane target for long distance pavement riding. My father used to say that you know you're old when you start to think that 55 is a reasonable speed limit! :D Given today's roads and tires and brake technology, maybe my father's 55 is today's 65?
    On dirt

    1. on smooth flat roads, 4th is your friend (used to be 3rd)
    2. on smooth steep twisty roads 3rd is your friend (used to be 2nd-3rd)
    3. on rutty or rocky bumpy stuff just leave it in 2nd (used to have to switch back and forth from 1st to 2nd)
    4. on gnarly suspension-bottoming stuff I can just tractor on through in 1st. Used to be I had to rev and feather.
    In fact, on three dirt rides totaling about 5 hours, I only remember having to feather 1st one time at this place where I had to cross over a deep water gully down the middle of the track because a tree branch was blocking the side I was on. GypsyWriter will remember this spot.

    This one thing right here is why I wanted the 34/11. My dreams are now fulfilled. I never need to eat chocolate again. I'm happy. :1drink
  7. claude

    claude Sidecar Jockey

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    Drone. Read your rundown ...what diameter tire do you have on the rear?
  8. davebig

    davebig Another Angry Hun !

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    Claude, I'd bet he has a 165/80/15 Vredestien Snow + roughly the same as the Nankang but I could be wrong.But he has an GSA trans with the lower 1st & 6th. The FD gears are always about what transmission you have.

    Drone
    Pretty much my thoughts too, this setup works great for my needs 4500 delivers 70+mph on the slab and I blasted up it in a 35 + mph crosswind getting 31 mpg on my way home(had allot of power) from GR3 rally in WI just to see how my steering setup,145/80 front tire and mileage worked.
    I believe that 4 k rpm is the sweet spot for the GS cams best economy this has been true with all 3 of the different FD's I have had in. For everyone of this dog damn list !It's an oversquare engine twist it's tail
    inspite of huge grunt around 3400 rpm it's not a tractor !
  9. claude

    claude Sidecar Jockey

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    Maybe we should try destroking one for giggles Dave. Offset ground crank and maybe some modified pistons? BMWGSAT (The T is for tractor) Hmmm. Or MAYBE A Rocket III or GL1800 powered adventure bike project? Sorry..th e little guys in my head are up and around again..over and out.
  10. davebig

    davebig Another Angry Hun !

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    We really need someone to fund a Ducati Multistrada 4v adv sidecar rig lots of chromoly and aluminum it should be easy to get 140 hp at about 10k rpm and not much flywheel weight, Ducati's love megaphones, once the clutch is out exciting things happen and noise is created.DB
  11. DRONE

    DRONE Dog Chauffeur

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    24"

    It's a Vredestein Snowtrac 3 in size 175/65-15.

    This tire, BTW, is pretty tenacious on dirt and gravel but the 65 profile doesn't give you much of a buffer against rim damage. I started out running it at 26 lbs which is the recommended pressure for a VW Beetle running the same size wheel (4x15). But when fully loaded the tire "looks" too soft. I bumped it up to 30 lbs for the 2nd half of this last camping trip, and might even take it up to 34 for the next trip. Realistically, though, I think I'd feel more secure on a 165/80-15 -- the sidewall is nearly 2 cm taller than what I got.
  12. dholaday

    dholaday Been here awhile

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    DRONE:
    The Vredestein Snow+ 165 r15 is an 86 profile. According to tire calculator that is sidewall height of about 5.6" about 1.1" more than your 175/65.

    Thanks,
    Duncan
  13. jaydmc

    jaydmc Long timer

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    With the set up we make for the M72 type sidecars when it is set up for an automotive rear wheel then the sidecar wheel and the bikes rear wheel will interchange. We also make our hub for the sidecar with a second bolt pattern that will take a BMW GS rear wheel, as the BMW wheel as a different off set we make the fender all bolt on from one side so that you can add spacers with longer bolts so that the fender centers over the BMW wheel.
    Jay G
    DMC sidecars
    www.dmcsidecars.com
    866-638-1793
  14. davebig

    davebig Another Angry Hun !

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    You give up about 2 mph running the 65 series vs the 80 for the same engine speed, I think gravity has as much to do with traction as tread patterns if your not in mud or snow. http://www2.tires-easy.com/cgi-bin/rshop.pl?details=Ordern&typ=R-180947&cart_id=42099638.135.28028&Cookie=&ranzahl=4&Breite=165&Herst=&Quer=80&Felge=15&Load=&S_Z=&Speed=&weiter=0&last_sort=&kategorie=6&Ang_pro_Seite=15&sort_by=&gesanzeige=&rf=&Transport=P&tyre_for=&F_F=&dsco=135&sowigan=&RunFlat=&m_s=&profil=&Achse=&LoadRange=&s_p=&x_tyre_for=&rsmFahrzeugart=
  15. DRONE

    DRONE Dog Chauffeur

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    Last weekend I was in the backcountry with GypsyWriter on her 2003 GSA. Her rig had a stock FD, stock shocks and a low-cost Federal brand all-season 165/80-15 tire. And she was also a n00b on her first backcountry hack ride. The punchline? She had absolutely no trouble keeping up with me and the other rigs! :eek1

    Possibly we all spend way too much time and energy and angst over this whole thing. :hmmmmm
  16. davebig

    davebig Another Angry Hun !

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    I was just wondering if anybody else noticed ?:wink:
  17. DirtyDR

    DirtyDR Dana

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    I noticed but I was just too polite to say anything. 2003 R1150GS Sport, stock everything except the 165 R15 Vredestein Snow+ and no problems for the last 40,000 miles with the hack.

    I did have to take it down to Denver last week to get the clutch done before I head off to the U.S.C.A. National in Arkansas next month since it finally started slipping after 100,000 miles. Service manager called me Saturday and asked me if I really still had the factory clutch in it, he couldn't believe it lasted this long especially with the sidecar. I wish I could have seen his face when I told him I haul the dirt bikes behind it on a trailer.

    [​IMG]
  18. DRONE

    DRONE Dog Chauffeur

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    I appreciate that, Dana, and I know you take your rig to very rugged, distant, hard-to-get-to places.

    But, in my defense, I outweigh you by XXX (a lot), and the stock shocks were bottoming out on me on dirt backroads. I found a set of Ohlins cheap on the FM, but with standard springs I bottomed them too. So my upgraded shock springs I think were a necessity.

    I certainly didn't need the 34/11 FD. The old 31/11 worked fine on dirt and pavement. But, as I mentioned above, the lower gearing is kinda nice to have on dirt because there's fewer shifts and little need for the friction zone. So, not a necessity--a luxury.

    On the clutch, I agree with you completly. If I needed another new clutch I would definitely go organic. No need for sintered or ceramic with the way I drive. I replaced my OEM at 64,000 miles and it was 78% gone. So I coulda gone another 15,000 miles, but since I was getting the slave replaced it seemed like a good time to do the clutch.

    As for the rear tire, it seems like ALL tires work pretty good and the only reason to go with a snow tire is for the cool "GS look" or if you are really gonna use it in snow. Maybe, too, the blocky open tread of a snow tire will help a little in mud or sand. But still, it's kinda fun to have non-sidecar guys come up to your rig and say stuff like "Man, that rear tire is AWESOME!" And you gotta put something on there, so why not something cool? :evil
  19. DirtyDR

    DirtyDR Dana

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    I am down to 220# now.

    I will put a new Nexen SB802 on it before I head out to the national, I really don't like the Vredestein Snow+ on the long highway trips.

    What really surprised me when the service manager called me is that he said the splines on the input and output shafts are great and do not need replaced, just not used to a dealer saying you do not need to replace something. I have never had the splines lubed on it either.

    In all honesty it probably could use the shocks at least redone and this Winter when I put it up and back go to riding the Ural exclusively again I will probably just send the rear Showa in to get redone and then look at something else for the front.
  20. dholaday

    dholaday Been here awhile

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    Snip: from DRONE
    "As for the rear tire, it seems like ALL tires work pretty good and the only reason to go with a snow tire is for the cool "GS look" or if you are really gonna use it in snow. Maybe, too, the blocky open tread of a snow tire will help a little in mud or sand. But still, it's kinda fun to have non-sidecar guys come up to your rig and say stuff like "Man, that rear tire is AWESOME!" And you gotta put something on there, so why not something cool?"

    +1 on the looks cool
    Elmer REALLY liked the Snow+ when he rode the TAT. Not saying something else might not have done as well, but the Snow+ worked for him in some nasty stuff.

    Dana: FWIW, I've had no problems with the Snow+ on the highway. See
    you in Arkansas in a few weeks and we can exchange stories. I'm leaving home on 15th, picking up SpousalUnit/LifeManager in Springfield MO on 20th, and will be at Rally on 21st.

    Duncan