Sibirsky Extreme 2012 - The Toughest Ride of Them All

Discussion in 'Ride Reports - Epic Rides' started by Colebatch, Oct 18, 2012.

  1. ROD CURRIE

    ROD CURRIE Been here awhile

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    Pruster got in this far before the airhead stopped

    <a href="http://s1283.beta.photobucket.com/user/rodcurrie/library/" target="_blank"><img src="http://i1283.photobucket.com/albums/a555/rodcurrie/Kazpics017.jpg" border="0" alt="Photobucket"/></a>

    We hopped in to help him haul it back to the shore.

    These pics don't show how deep it was. Off the sandbanks it was chest deep and trying to find the route between one sandbank and the next was the challenge.

    The KTM was fine even in the deepest bits so when we got towards the far side I tried to hop on and ride it out. My boots were so heavy and trousers so full of water that I could barely lift my leg over the saddle.

    <a href="http://s1283.beta.photobucket.com/user/rodcurrie/library/" target="_blank"><img src="http://i1283.photobucket.com/albums/a555/rodcurrie/Kazpics019.jpg" border="0" alt="Photobucket"/></a>
  2. Francesco2

    Francesco2 Adventurer

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    First off all: Great RR! The detailed info and backgrounds from Walter supplemented with the experiences of the other riders makes this a clifhanger :clap

    Just wondering as a beginning offroad rider, with no real watercrossing experience, how bad are these water intrusions for your engine? I mean, the water will flow along the ports/valves into the cilinderheads right? Your engine oil will mix up with some water which can't be doing any good to the engine lifespan...

    This brings up the next question, maybe Walter can answer this, how many (hard-) offraod miles can a 650cc thumper withstand before needing a revision? Walter must have done several miles with his beemer isn't it? Did you guys take along spare oil on this trip?
  3. MrPulldown

    MrPulldown Long timer

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    Bad. If your cylinder is full of water it will not compress. I have seen bent and broken rods from the piston trying to compress the water many times.
    The fuel/oil/water mixing part is the least of your concerns. Your electircals can also short, frying everything.

    Not a bike but you get the idea.
    [​IMG]
  4. allroadtoine

    allroadtoine Adventurer

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    After a watercrossing the engine stopped and I was stupid enough to try to start the engine. Fortenately only the starter broke. Showed in my case the weakest part of the system and lukely not a hole in the piston..

    Be carefull

    Greetings

    Toine
  5. dashmoto

    dashmoto Serial Tinkerer

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    There's a few things that can happen.

    If the engine's still running when it sucks in water, you potentially have the sort of damage in the photo above.

    If you turn it off as you fall in, or push it through deep water with the engine off, you'll get water in the airbox and probably exhaust, and unless the engine happens to have stopped with all the valves completely closed, it will end up in the cylinders. Even if you try and start it you won't bend conrods, etc, because the starter won't get it spinning hard enough, but you won't be able to get it running until you take the spark plug out and turn the engine over to pump it out.

    If your bike has a crankcase breather which runs into the airbox (as a lot of bikes do), then the water in your airbox will inevitably flow downhill into the crankcase, and ruin the oil. This is A Bad Thing. I've done it twice to my XT660Z, so was utterly unsurprised on reading one of Colebatch's previous reports to find that Terry had done the same to the XT660R he had on that trip. I have a simple mod in mind to prevent it happening a third time (of course I thought of doing it after the first time I went swimming, then didn't actually manage to do it before the second time :D).
  6. Prutser

    Prutser Long timer

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    When I checked the boxer didn't have water in the engine oil after this crossing. After draining the carbs and cilinders the bike was fine.
  7. _cy_

    _cy_ Long timer

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    yikes... sounds like some deep crossings...
  8. hardwaregrrl

    hardwaregrrl ignore list

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    I often thought about some sort of compression/rubber sock we could put over our float bowls to keep the H2O out. Ah, the mighty airhead!!!!:pynd:gdog!!!! Thanks for taking us along Prutser!!!
  9. Colebatch

    Colebatch "Moto Porn"ographer

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    Unfortunately my bike wasnt fine. Still with water in my fuel. I kept turning the bike over trying to pump the water out of the tank via the engine.

    After an incredible amount of cranking, my battery finally died. We had no choice but to try and jump start it. Prutser had the most torque so offered to tow me up the top of a nearby hill.

    Unfortunately we were lazy and connected the bikes up incorrectly.

    [​IMG]

    So when we got to the crest of the hill, and slowed down, slack came into the rope, and it caught on my front wheel knobblies, got sucked into the front wheel and jammed it up solid. With the front wheel locked up, there was only one place for me to go ... down!

    With the bike and myself back on our feet, and the bike still not wanting to start, We decided to tow it properly. Footpeg to footpeg. There was a gravel road 2km away, and a village about 10 km (6 miles) away. We can try and tow it there while occasionally trying to clutch start it along the way. Terry stepped up to be the tow bike. The others followed sedately as we towed at 40 km/h

    [​IMG]
  10. hardwaregrrl

    hardwaregrrl ignore list

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    :lurk Loving it Walter.:freaky No jumper cables?
  11. Prutser

    Prutser Long timer

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    The R100GS I had before this bike had no problem with H2O ( up to a certain level :rofl) could keep it running as long as I liked with the water just under the intake.

    I'm afraid it wasn't "the mighty Airhead" at this point :nah:nah
  12. igormortis

    igormortis Cafe Reise

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    So did you diagnose the problem - where was the water getting in?

    Great RR, as usual - love the towing pic, Prutser!
  13. xuare

    xuare Gravity wins again

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    It was my belief that a carb bowl also has a vent, and that vent needs to be to atmosphere (i.e. not the airbox) so the pressure differential between the intake manifold and outside can be used to help meter the gas correctly. If water covers the vent the bike dies.

    Is this what was stopping bikes?
  14. Colebatch

    Colebatch "Moto Porn"ographer

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    Don't need them. Terry and I were experienced in the art of jump starting without cables. You hold a good battery against the dead one - making sure negative terminals touch - then connect the positives via a screwdriver Jen.

    But we still had to get the water out of my fuel. By now we had decided to head for the village and think about it there. Terry towed me there
  15. mrwwwhite

    mrwwwhite Been here awhile

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    damn dude, that's an outstanding trip, now I gotta take my bike thru those rivers one day. kudos to you all, balls of steel!
  16. Prutser

    Prutser Long timer

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    I did not fix it yet.Although it was better after I squeezed the brass vent tubes that are in the float bowls.
    Would love to have a chat about this problem. But it might be better to do so in the http://www.advrider.com/forums/showthread.php?t=375091 thread.
  17. ROD CURRIE

    ROD CURRIE Been here awhile

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    Francesca.
    All the above is true and learned by the usual painful experience, but please don't be frightened of water crossings. As you'll have noticed Beemster was worried at the start of the trip, but in no time was splashing in without fear.
    Engines have indeed been damaged and electrics fried -but a bikes rear wheel contact patch is too small to allow you to go tearing through deep water, and if you're going to go down or over, you'll usually know before it happens and be able to kill the engine or at least partially catch the bike on the way down. On one day of this trip we did about 40 crossings, some very deep and I think (but may be wrong) all of us binned the bikes in the river without damage. I certainly did, Walter and Terry maybe did 500 crossings this year without any significant problems. You'd have to be pretty unlucky to wreck anything so please don't let this put you off river crossings, they're some of the best and occasionally the most challenging bits of overlanding. Just be careful and enjoy.
    One of the best bits is seeing your mate go down...:lol3...as you'll I think see on this trip soon.
  18. Bli55

    Bli55 -

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    Could you elongate the breather tube to cure this in the future?
    Doesn't look possible if someone chose the locking cap...
    You have been using the non locking-cap for X-tank?
  19. Thomas B.

    Thomas B. desert racer

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    hi Prutser,

    I gave an answer in the thread you mentioned above.

    Cheers Thomas
  20. Prutser

    Prutser Long timer

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    On Walters bike the engine air intake is about 5 cm lower than the fuelcap breather hose ! (unloaded bike)
    I think you could use a longer hose for the breather. So you don't have to watch the tank's breather and worry about that !
    Although you are getting close to the max depth the bike can handle at the front.