DR750 & DR800 owners thread

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

  1. bushybutt

    bushybutt Bushybutt

    Joined:
    Apr 27, 2008
    Oddometer:
    20
    Location:
    New Zealand Adventure Paradise
    Hi Spen, I take it the stand would suit a SR41/42 750/800. What is the height of the stand in the down position.
    The reason I ask is that I have a SR43A with an Ohlins with a I kg heavier spring than standard for two up riding with luggage and at rest the bike sits higher than a standard sprung bike. I was wondering if the stand would be long (high) enough to get at least one wheel off the ground.
    Cheers Bryn

    Hi Robmoto, I hope you, your family and all our DR riding mates are safe from the bush fires that are ravaging through Oz at the moment. Our thoughts are with you.
    Bryn
  2. Ladder106

    Ladder106 It's a short cut, really

    Joined:
    Jan 31, 2005
    Oddometer:
    5,469
    Location:
    Davis, CA
    A bit of parts number research this evening shows a difference between the big rotating part of the generator....called the "rotor" oddly enough.

    It would appear that I have to see if the SR41 rotor will fit onto the SR43 crank.

    Then get out the calipers to make certain nothing comes in contact while spinning.

    .....maybe this is more complication than is reasonable?


    Robo....hope you're keeping cool down there.
  3. rowie

    rowie Been here awhile

    Joined:
    May 1, 2011
    Oddometer:
    263
    Location:
    Proserpine, QLD
    I'm looking for info about balancer chain timing for my DR650 and came across this post. I used an old Makita 5" angle grinder pin spanner that I found at work. Looks like this:

    http://www.amazon.com/Amico-3-5mm-Grinder-Spanner-Wrench/dp/B007VD33S0

    Just had to grind a small amount off of the inside so that it would clear the boss on the sprocket. Does the job and cost stuff all :D
  4. bluesman

    bluesman Long timer

    Joined:
    Feb 13, 2007
    Oddometer:
    3,439
    Location:
    Hoegaarden, Belgium
    Happy New Year, evryone! :)

    Ladder, yes BUT....
    Timing on SR43 is different than timing on SR41. E.g. I can't say it will not work - 99.9% it will, but will it be good or not optimal - hard to say, since you going to use "brains" and pickup coil location off SR41 on camshaft of SR43.
  5. Simosez

    Simosez go ride your bike.

    Joined:
    Oct 13, 2010
    Oddometer:
    641
    Location:
    eternally sunny lithgow
    G'day everybody, its been a while since i posted in here. haven't ridden the big girl in a while. fractured my right humurus (no, it wasn't) when i fell off the KTM back in september. anyway I'm back on now, the arm is not 100% but it will do.
    I have a slightly dodgy starter motor. i pulled it apart to clean and inspect it and found two sections of the commutator smeared/shorted together. I fixed the commutator as best i could and gave it a good clean up. it works better now but won't spin fast enough to fire it up in the cold weather like you blokes on the other side of the planet have now. it starts easy here in 30 to 40 degree C temps we have at the moment:D
    anyway i was wondering if this starter motor was used in any other applications? did a part no. search on google but have had no luck. it appears to be DR BIG only.
    pn. 31100-44B00-H17
    i am going to replace the brushes and increase the cable size and see if that helps. i have a new battery already.

    any other ideas or assistance would be appreciated.

    Rob, i will get those jets to you soon. sorry for the delay.
  6. Ladder106

    Ladder106 It's a short cut, really

    Joined:
    Jan 31, 2005
    Oddometer:
    5,469
    Location:
    Davis, CA
    Oh...do you mean the valve timing is different on the SR43 also. I have to have a look at that. Hopefully the service manual lists it.

    Thanks

    Simosez,

    Had a bit of a search-around and pretty much found what you did. There are a few places that will sell the armature only if that is your problem. German ebay also has brushes for sale.

    I wouldn't think that there would be that much variation in starter motors across the whole motorcycle industry. Just looking at the motors on all my bikes it seems their size and mounting points are all about the same.

    Maybe a trip to the local salvage/breaker yard with motor in hand would be beneficial.
  7. Bambi

    Bambi Been here awhile

    Joined:
    May 14, 2009
    Oddometer:
    746
    Location:
    Linz upon Rhine, Germany
    Hi Ladder,
    just trying to reach Lars (Evildent Resi) by phone but he doesn't seem to be at home. I think he could answer your questions. I'll send him an e-mail to direct him to your questions ... and Stefan Hessler too, of course. I could answer to parts of your problem but not in every detail. I fear, this would lead you to more misunderstandings than help.
    Keep calm, help is at hand ... :evil
    Kind regards, Bambi
  8. Bambi

    Bambi Been here awhile

    Joined:
    May 14, 2009
    Oddometer:
    746
    Location:
    Linz upon Rhine, Germany
    Hi Longdude,
    just to correct this: 'Bambi, you are a genius, and you too Lars!'
    Lars is the genius!!! I just do remember most things around motorcycles that caught my interest ... :clap
    Kind regards, Bambi
  9. robmoto

    robmoto Long timer

    Joined:
    Feb 15, 2009
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    4,009
    Location:
    Australia
    Hi everyone , It has been hot here 40 celsius some day,s and I have been been working outside in it doing work arround my place moving dirt and cutting down trees and stuff.
    Luckily no fires in my area at the moment, my blue big is now fully apart to get ready to paint I bought all the bling bits 6 months ago but had no time to do the job .
    Ray 43 fly wheel should go on as far as I know, a rattle gun works good to get those big nuts of ballancers and alike.
    Big screens wider ones if you run bark busters they will hit the screen I have tried this allready. cheers.
  10. robmoto

    robmoto Long timer

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    Feb 15, 2009
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    4,009
    Location:
    Australia
    Simmon there are 4 brushes inside don,t forget just not 2. I had to go and buy more jets not happy never again.
  11. bluesman

    bluesman Long timer

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    Feb 13, 2007
    Oddometer:
    3,439
    Location:
    Hoegaarden, Belgium
    Or just simply wait for Lars to come online :) I am sure he has done it in some form or shape and will have answers for you right away.
    I just been thinking - why not to do full transplant, e.g. SR43 motor + brains+coils into SR41 frame? It won't be big deal if you use "bridge" wiring except it will require a lot of looking at diagram and tracing :)
  12. MrPopples

    MrPopples Been here awhile

    Joined:
    Jul 2, 2012
    Oddometer:
    258
    Location:
    Stinky cheese country
    Lars, stefan,

    Thx for your answers,
    really helpful :)

    Job is a bit *complicated* right now, that's why my answer is quite delayed ... and rather short :(
    I'll keep you updated about what I'm doing about this fork ...

    Thx,
    Guillaume.
  13. Ladder106

    Ladder106 It's a short cut, really

    Joined:
    Jan 31, 2005
    Oddometer:
    5,469
    Location:
    Davis, CA
    I'm a big chicken when it comes to electricity....that's why I've stayed away from bikes with tiny servo-motor for everything short of putting the stand down for you (although that is probably not far off)

    I do much better with nuts, bolts, wrenches and, of course, hammers

    The SR42 engine is at least out of the frame. The SR41 is on the work stand and I'm waiting for all the

    YOU ARE OUT OF YOUR MIND

    opinions to come through before I attempt a transplant.

    Thanks, everyone, for their ideas and assistance so far.
  14. khanez

    khanez n00b

    Joined:
    Dec 9, 2012
    Oddometer:
    6
    Location:
    Lahore, Pakistan.
    Hey folks finally found a Dr lover thread. I am the only one in Pakistan with a DR that i know off. I had know clue that Suzuki had a DRbIg800 every produced. i was in Karachi visiting a friend. As he got few bikes around. i was ready to take on a trail bike that is dual purpose on and off road. After spending some time with different dealers i met this guy who had this big blue crazy looking bike that said DR BIG. I was convinced that the owner is a doctor. I took the dr for a ride and i was blown apart. The power was just crazy. i was just loving the ride. I made a deal and got it at my friends place. Where i got the oil changed and in two days i packed up canceled my air fair. Sat on my bike and after 1300km i was in my home with a big smile. The bike was not in original condition it was raised 5inches. The previous owner had it for stunts mainly wheelies. It took 11months for me to get it back to original condition. Its all ready to hit KKH next summer on it.

    The only thing that i need is new tires.

    Hope to see you with your DR on KKH. Wonder if there have been any on it !!!

    What was the reason DrBig800 was not introduced in USA?

    http://www.facebook.com/photo.php?fbid=421186394596772&set=a.343912815657464.71541.100001162461213&type=3&theater
  15. Ladder106

    Ladder106 It's a short cut, really

    Joined:
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    Oddometer:
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    Location:
    Davis, CA
    Hey....guess what....Lars sez I'm NOT nuts :clap

    43 engine into a 41 transplant is proceeding on schedule.

    Thanks, Lars.

    Then the plan is to tear down the SR41 engine, discover where the metal bits are coming from, fix that and rebuild with new piston (going to need someone's help with this one but I think I can get on from Stefan),valves (Kibblewhite here in the USA has brand new valves for the Bigs....shockingly expensive...but available) and maybe an 800 crank installed (per Robs advice).

    Then the SR43 will get all repainted (1991 stripes and RED) and powedercoated and I'll have TWO in the USA (of course I'm the only one that cares)
    ....................

    Welcome Khanez,

    Remember your bike is air cooled. For your climate, you'll want to use very good oil and change it often. Also keep a close eye on the air filter due to sand and make completely certain that the rubber boot between the airbox and the carbs is sealed correctly to the carbs. It's difficult to see this and easy to get wrong if the bike has been apart before.

    Also, I hope you mean the bike was raised by 5cm NOT 5 inches or you'd be getting on with the help of a box.

    Send us photos of your bike and your rides, please. It's great to see these bikes in other parts of the world.

    The reason the Bigs never came to the US was because most Yanks remain ignorant about Rallye racing/riding. We still see 2 distinct schools or riding here....either road racers or Harleys. Adventure bikes are beginning to catch on but not popular yet. I hope they never do become too popular here since that always tends to spoil things. I'll continue to cope with getting parts and advice from folks in other parts of the world.....it also makes for much more interesting conversations.

    All the people on this thread are great. Try reading through it from the start. If you do that you'll gain almost all the knowledge and ideas you need to keep your bike running well.
  16. Longdude

    Longdude Tall Geezer !

    Joined:
    Dec 11, 2012
    Oddometer:
    62
    Location:
    Devon, England
    I just got my engine back from Soda crystal blasting. Nice job. Just need to wash off all the dust, dry it and then etch primer followed by satin black. What do you think ?

    Before....

    [​IMG]

    After.....

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
  17. khanez

    khanez n00b

    Joined:
    Dec 9, 2012
    Oddometer:
    6
    Location:
    Lahore, Pakistan.
    I am 6ft2 and i was on my tippy toes. Only could get my one foot down just to get the balance. it was that much raised. i think it was 5inches(with some hollywood twist) but now i can very comfo siting on it. i have more control on it.
    don't have an option to attach pic but you can always cheek out my FB page
    Thank you .
    http://www.facebook.com/media/set/?set=a.343912815657464.71541.100001162461213&type=3
  18. mait

    mait Been here awhile

    Joined:
    Aug 16, 2009
    Oddometer:
    338
    Location:
    Tallinn, Estonia
    Ray, you can buy one of those pistons from Stefan.
    http://www.dr-big-shop.de/BIG_MotorTuning_689.html
    I think shipping cost will be not be an issue any more :huh


    I pulled the engine out of the frame yesterday, too. I hope I can find out where the oil is going.
  19. Silent Hunter

    Silent Hunter Been here awhile

    Joined:
    Dec 1, 2009
    Oddometer:
    101
    Hi Guys, I got my bike going.

    Now it revs up on the first couple of tries every time, even got my battery recharged after a few rides. :)

    Turns out its a very very very rich mix that causes it to be difficult to start.
    What I did was screw the Air : Fuel screw all the way in, then experimented with 1/2 a turn out each time, and got it easy to rev at 2 turns out on each side. Before that it was 5.5 & 6.0 turns out on the left and right screws respectively.

    Fuel consumption was an amazing 11 km per liter! :rofl

    Yap, I do turn off the fuel tap BEFORE I turn off the decompressor.and ignition key. :)
  20. Silent Hunter

    Silent Hunter Been here awhile

    Joined:
    Dec 1, 2009
    Oddometer:
    101
    You might need a SR41 CDI for a SR41 engine Ladder.
    The last time I bought a SR43 CDI from Zappa for my 1991 SR41 DR800 SL. Sad to say it doesn't work, the CDI was missing a cable that attaches to the wiring harness. 3 head for a 2 head socket.

    So I gave it away to Robmoto and it works for his bike.

    I hope you can get around this problem and avoid buying a new CDI for the transplant though, CDI s are expensive!