DR750 & DR800 owners thread

Discussion in 'Thumpers' started by MCmad, Jul 14, 2008.

  1. jurvooss

    jurvooss Adventurer

    Joined:
    Sep 30, 2011
    Oddometer:
    17
    @shanekfalcon nice bike first of all... love ur P.L.A.N plan! :D at second thoughts now ive seen it, ill pass on it, but thanks for the help :freaky
  2. wundis

    wundis Adventurer

    Joined:
    Apr 19, 2012
    Oddometer:
    83
    Location:
    Vilnius, Lithuania
    Hello everyone,

    I have just received my new head (mls) and base (single layer) gaskets. Should I spray them with anything (like a copper based spray?) or just clean the surfaces thoroughly and put them on and torque everything to specification?

    Thanks
  3. motolab

    motolab Long timer

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    Feb 16, 2006
    Oddometer:
    2,915
    Are they made by Cometic?

    Regards,

    Derek
  4. mait

    mait Been here awhile

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    Aug 16, 2009
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    Location:
    Tallinn, Estonia
    I have never sprayed them. Always used original top and base gaskets. Torque the bolts to specs, then wait a few minutes and retighten.

  5. Bambi

    Bambi Been here awhile

    Joined:
    May 14, 2009
    Oddometer:
    730
    Location:
    Linz upon Rhine, Germany
    Hi there,
    I'm lucky to announce that Miss Marlboro is up and barking again! The engine, rebuilt by Lars, is re-installed and all the little things around it are mostly refitted, just a few things to be done. Re-mounting of fairing, tank- and engine-guards, side-panels and sealing of the oil-filter-cover. Looks like a new o-ring is necessary at that point. But that's no problem, there are shops here with such an amount of them that they sell them ...
    Nice regards, lucky Bambi
  6. jurvooss

    jurvooss Adventurer

    Joined:
    Sep 30, 2011
    Oddometer:
    17
    im pretty far in my research and i almost made a nice deal with a guy that sells one, and it all went so fast that i never aksed you guys...

    because i('m) wan(gon)na fit a shiny aluminum swingarm on my dr800 1990...

    but my simple question is what do u guys think is a good arm for it? any suggestions? any experience? any plans?:ear

    greetings...

    And second (just for fun) question what is your lowest price u paid for a "complete" Dr800/Dr750? mine was 450 euro! :D complete, only the engine was full of gasoline! u know o-ring-thingy-problem! :wink:
  7. Simosez

    Simosez Been here awhile

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    Oct 13, 2010
    Oddometer:
    458
    Location:
    eternally sunny lithgow
    450 euro:eek1 you lucky, lucky barstard.:lol3
    i paid more than that but they are fairly rare over here although they seem to be common as dog poo around Bathurst:D
  8. jurvooss

    jurvooss Adventurer

    Joined:
    Sep 30, 2011
    Oddometer:
    17
    yeah well, some are lucky some are not... the owners house burnt down and they sold the rest of the ´´damaged´´ inventory... so i came there for work to buy some fine pieces out of the inventory [i´m a picker]... and than i saw her :eek1 i almost said what i wanted to pay seen-on-sight, and that was like 800 to a 1000... he said 400 and i got a spare engine with it for 50 bangerss :D :rofl:clap:freaky i was familiar with the bike so... with all the rest it was my best day ever... EVER!:lol3... 3 months later in Germany bmw R100gs PD ´95 original 34k-km... 1100 quid! i pissed myself back home so happy i was! but he, some are lucky some are not... [i felled flat on my face many many times more] but is funny to tell this story..
  9. mait

    mait Been here awhile

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    Aug 16, 2009
    Oddometer:
    337
    Location:
    Tallinn, Estonia
    Glad to hear that Bambi, I know that feeling of a fresh engine barking to life!

    I just finished assembling my bike yesterday and took a short test ride of 50kms, didn't have too much time. To be honest I was surprised it fired up immediately and worked so well with so many mods. I was expecting a lot of hassling with jetting etc. But it was running strong throughout the revs. With new cam and fresh piston I did not push it to the limits yet. I will do some jetting and mileage tests in next few days as soon as time permits.

    Mods done:
    new piston 106mm,
    redesigned air intake (cut the intake opening of stock filter larger just like Rob and Ray experimented).
    SR43A camshaft
    Lars' oversize header
    GSXR muffler
    130 main jets
    needles raised 1 notch
    45 pilot jets
    taillight, indicators, handguards

    [​IMG]

    [​IMG]

    [​IMG]

  10. spen

    spen on my arse

    Joined:
    Sep 21, 2009
    Oddometer:
    346
    Location:
    sunny ireland
    Bikes looking good :D
  11. wundis

    wundis Adventurer

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    Apr 19, 2012
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    Location:
    Vilnius, Lithuania
    Ooh, nice one mait. Hope she runs well. If I get no more silly delays (like a broken bolt and a piece of drill in my eye) I hope to finish working on my Big this week too...
  12. mait

    mait Been here awhile

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    Aug 16, 2009
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    Spen, the bike looks much better on the photos than in real life. The plastics and bodywork need some serious attention soon. But not before Wilbers shock and pumper carbs. :lol3

  13. StefanS.J

    StefanS.J Hellre än Bra!

    Joined:
    Mar 17, 2012
    Oddometer:
    27
    Location:
    Sweden
    :thumb

    Great Looking Bike!!
  14. jurvooss

    jurvooss Adventurer

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    Sep 30, 2011
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    someone ever tried to ditch the whole cushion system on the back of a dr800 1990, so the shock is attached from frame to swingarm (directly)!? :ear
  15. Bambi

    Bambi Been here awhile

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    May 14, 2009
    Oddometer:
    730
    Location:
    Linz upon Rhine, Germany
    Hello mait,
    looks good!!!
    Concerning the need of attention to body-work:
    Iris did a great job polishing these parts with car-wax (and lots of elbow-grease!). We had some white-couloured wax from a white VW Caddy pick-up we owned for about 10 years. That worked great with the white parts. There should be also a can of red wax from another (red) Caddy (that I still own and would love to restore) and a red VW Polo. That'll be tested on the red parts of the bike. When I find that can again ...
    Kínd regards, Bambi
  16. Simosez

    Simosez Been here awhile

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    eternally sunny lithgow
    well i have finally decided what i want to do with my Big. it is going to cop a top end rebuild using one of Maits custom pistons (thanks Mait:wave) freshen up the head, cma chain, balancer chain a set of pumpers and a custom airbox.
    Lars, can i get one of your header pipes. how much?
    i've already got good suspension on the old girl and it has done over 105,000ks so i need to know that i can rely on the motor.
    i will try to remember to post up pics.
  17. bluesman

    bluesman Long timer

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    Hoegaarden, Belgium
    That's bad idea, trust me. I had bikes with this setup. They NEVER performed suspension-wise as good as proper progressive. Even KTM gave up on that.
    One of most important charactersitics of DR Big is it's surprisingly good geometry and handling. It can carve tight corners or go through forest. By ditching very well calculated progressive system you will kill one of this factors. And even PDS shock won't help really.
  18. Silent Hunter

    Silent Hunter Been here awhile

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    Dec 1, 2009
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    101
    Guys, I just changed the sprockets of my DR big to 16 front, 42 back.
    The power is amazing. I was going 100km/hr at barely 3,500 RPMs.

    Previously on 15 front, 45 back, the bike needs to go up to 4,000 RPMs to match that speed.
  19. Bambi

    Bambi Been here awhile

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    Linz upon Rhine, Germany
    ... and how does it feel getting it rolling from a stand-still? And when you get into the twisties, perhaps even up-hill?
    I'd be rather thinking about putting one more tooth on the rear in search of more grunt ...
    Kind regards, Bambi
  20. Silent Hunter

    Silent Hunter Been here awhile

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    Dec 1, 2009
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    101
    I haven't tried that yet, been raining cats and dogs here the last 2 days.
    But I reckon because the DR Big is a big single cylinder, even though there will be some power loss, it shouldn't be so bad as not to be able to climb up a hill.