Ural engine swap info needed

Discussion in 'Hacks' started by crankshaft, Oct 14, 2006.

  1. crankshaft

    crankshaft Guns are for pussies

    Joined:
    Aug 12, 2004
    Oddometer:
    14,024
    Location:
    Burlingtron,VT
    I have a friend that owns a 2006 Gear up and He's interested in putting in a BMW Airhead engine. Which Airhead motor would be best for that type of swap? I was thinking an R80 g/s motor with R100 pistons and jugs with the stock R80 heads for more low end for crawling and getting that beast moving. Any ideas? He's a very skilled fabricator, so He can manage the project if He can get the right info.

    Thanks,
    Aaron
    #1
  2. ctp13

    ctp13 Been here awhile

    Joined:
    Apr 3, 2006
    Oddometer:
    255
    AH.. I'm not sure you can put R80 Heads on a 1000 barrel But maybe ? .

    But GS heads should have smaller valves and the 32mm intake for tork . makes sense why have a bunch of top end HP if you cant go that fast.

    I think there is a site Depneworld or somthing that has people who know about the conversion in's and outs.

    I found them by dooing a Google for "two wheel drive sidecars" took some looking but they are out there.

    Chuck
    #2
  3. Hannibal-8

    Hannibal-8 Been here awhile

    Joined:
    Mar 31, 2005
    Oddometer:
    107
    Location:
    Saratoga Gap
    Wow, sounds a bit early for a swap. I think his Ural is the "new" 750 but it is still only 40hp. A 60hp 1000 would certainly change things. Would this be an engine only or would he go for a engine/transmission transplant? What about his reverse gear and 2 wheel drive capability? I'm interested in getting into sidecars and would be interested in the shortcomings he is experiencing with the current powerplant. Thanks, Rich p.s. If its a power shortfall (and not a reliability/spares issue) can the stock Ural be pushed up a bit?. Rich
    #3
  4. friar mike

    friar mike IronButtGruver

    Joined:
    Apr 21, 2004
    Oddometer:
    4,921
    Location:
    Wasilla Alaska
    here's one I saw in Dawson city Yukon this summer the guy ride's it daily with his dog it has a bmw engine and its 2WD but it is a older Dnepr.
    [​IMG]
    #4
  5. crankshaft

    crankshaft Guns are for pussies

    Joined:
    Aug 12, 2004
    Oddometer:
    14,024
    Location:
    Burlingtron,VT
    Well, climbing hills loaded is a bit tough when He's carrying all his gear. Heck, Scotts 6-3 and all of 260#, so an extra 20 hp would be great.
    He really wants to keep the two wheel drive and reverse.... actually He won't go without it, so its just the engine swap.

    I'm amazed every single time we take the thing trail riding. It just tractors through all kinds of muck,rocks and general shit that no many off road vehicles can't touch, but a few more horses will really help.

    [​IMG]
    #5
  6. AceRph

    AceRph Affluenza Free! Administrator

    Joined:
    Jan 12, 2003
    Oddometer:
    24,730
    Location:
    Where the stupidest people on earth run things
    You're grinning pretty big in that picture, Aaron.

    Howse things , man?
    #6
  7. Jimbosidecar

    Jimbosidecar Adventurer

    Joined:
    Dec 26, 2004
    Oddometer:
    239
    Location:
    Beijing
    Yes, there are a number of BMW powered Urals out there. I saw one on E-Bay a week or so ago. Send me an e-mail and I'll give you a list of people who do these conversions. I myself do the Chang Jiang/BMW conversions.
    Regds,
    Jim
    <www.mycj750.com>

    #7
  8. Gummiente

    Gummiente Rebel Without A Clue

    Joined:
    Oct 7, 2007
    Oddometer:
    449
    Location:
    SW Ontario
    Can he not wait until the warranty has expired first?
    #8
  9. McB

    McB Joe 40 ouncer

    Joined:
    Apr 8, 2005
    Oddometer:
    15,467
    Location:
    North Slope of the Flint Hills
    Uh Uh. Correct response is, 'Tell him I'll give him a hunnert bucks for the Ural motor, so he doesn't have to sell it for scrap'. :D
    #9
  10. out rider

    out rider You Go First

    Joined:
    Jul 26, 2006
    Oddometer:
    949
    Location:
    IN PROTECTIVE CUSTODY
    #10
  11. RedMenace

    RedMenace Adventure Sidecar

    Joined:
    Dec 22, 2001
    Oddometer:
    5,386
    Location:
    GoodLiver,Oregon,USA
    Use a /2 friction plate and a later spring and pressure plate.*This is based on what worked with the earlier transmissions. I haven't had a newer one off-check the input shaft splines! You will need to shim the pressure plate out to get correct lever pull and you will need to make a throw out rod.

    The holes in the ears of the transmission housing almost line up. the tabs that center the transmission to the bell housing do not. You will need to do a little fabrication there to make things fit.

    Fitting an airbox can be a challenge.

    You will be overpowering your transmision, reardrive and sc drive. Bearing failures are not unheard of, but you may get lucky. I blew up a few of the rubber donuts with my R100 powered Dnepr. Keep a spare drive donut with your kit.

    You will be running the BMW near redline at freeway speeds. An external filter/cooler is not a bad idea. Old airhead mechanical advance ignitions suck. I'd look for an aftermarket electronic ignition that shitcans the bobweights( not all of them do- I had a Dyna that replaced the points but kept the bobweights- boy was I pissed when I found that out!). You will have a lot more weight so the crappy Ural shocks will be even crappier-think about upgrading the suspension.

    Take pix and post em ;-)
    #11
  12. crankshaft

    crankshaft Guns are for pussies

    Joined:
    Aug 12, 2004
    Oddometer:
    14,024
    Location:
    Burlingtron,VT
    Its funny how this thread just showed up again:lol3 He blew the motor this summer, but I'm not sure whats he's doing now.

    Hi Ace:wave
    #12
  13. Bonnie & Clyde

    Bonnie & Clyde Wishing I was riding RTW

    Joined:
    Jan 10, 2006
    Oddometer:
    2,966
    Location:
    Gardnerville NV
    Anyone in California or on the West Coast doing the Ural BMW swap?

    I have a Artic Camo Gear Up on order. Still waiting for it to come in. Hope it is a much improved machine as rumored. Has the Two year warranty and then if all else fails, bring in the back up plans.

    My plan "B" is a BMW motor transplant if the Ural motor is problematic.

    Pan "C" put Ural chair on my 1150GS ADV if it all is a wash.
    #13
  14. Jimbosidecar

    Jimbosidecar Adventurer

    Joined:
    Dec 26, 2004
    Oddometer:
    239
    Location:
    Beijing
    Not that I know of. There's a guy in PA and a guy in Maine.
    Regds,
    Jim
    <www.mycj750.com>

    #14
  15. Bonnie & Clyde

    Bonnie & Clyde Wishing I was riding RTW

    Joined:
    Jan 10, 2006
    Oddometer:
    2,966
    Location:
    Gardnerville NV
    #15
  16. Jimbosidecar

    Jimbosidecar Adventurer

    Joined:
    Dec 26, 2004
    Oddometer:
    239
    Location:
    Beijing
    Yeah, that's one way to do it.
    Regds,
    Jim
    #16
  17. IMZman

    IMZman I ain't no fuckin' n00b

    Joined:
    Jan 9, 2008
    Oddometer:
    38
    Location:
    NSB, FL
    BMW engine transplants
    Contact:
    Richard Winter
    287 Highland Meadows Rd.
    Highlands, NC 28741
    828.526.0783
    #17
  18. mike1murphy

    mike1murphy n00b

    Joined:
    Nov 19, 2007
    Oddometer:
    3
    what about a vw beetle engine? i've seen a few urals, and even a bmw. wouldn't be easy though i guess.
    #18