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Author Topic: When is a water-crossing to deep?  (Read 985 times)

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Offline Watty

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When is a water-crossing to deep?
« on: January 14, 2010, 07:45:40 am »
Judging from this photo it would appear that as long as your headlight is above the water, all is OK!  :mwink:
Check this Djebel 250XC doing the water-crossing thing - just more proof that the Djebel is a  :thumleft: scooter!

 

Offline Doggone

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Re: When is a water-crossing to deep?
« Reply #1 on: January 14, 2010, 07:55:31 am »
If you don't make it! >:D ;D
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Offline sidetrack

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Re: When is a water-crossing to deep?
« Reply #2 on: January 14, 2010, 08:01:35 am »
When the water is at airfilter level
Little by little, one travels far
J.R.R Tolkien
 

Offline Kaptein Bos

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Re: When is a water-crossing to deep?
« Reply #3 on: January 14, 2010, 08:05:15 am »
When the bike dies on you half way... :ricky:
 

Offline lecap

Re: When is a water-crossing to deep?
« Reply #4 on: January 14, 2010, 08:11:00 am »
He's doomed the moment he taps off.

The principle is the bike is creating a bow wave as it moves. The airbox is in the valley behind the bow wave and you can make a water crossing which would actuially submerge the snorkel if the bike would stand still.

Not recommended for very obvious reasons.

Water rules:

Walk first if you're not sure how deep it is and check for submerged obstacles. Try to find a route through the water that does not require direction changes in the water.
Easier and faster to drain boots than to drain bike ;D

Aim for and ride in ruts rather than on middlemannetjies (if applicable).

Don't hesitate once in the water. Cross the water with determination and momentum but in low gear and at low speed.

For a decent DS bike and an average  rider you can use as rules of thumb:
If water is deeper than the front wheel is tall: Do not cross.
If the water is flowing and is deeper than the ground clearance of the bike: Cross with a person securing the bike downstream, eventually walk the bike in first gear with second person on the other side.
If the water is deeper than knee deep and flowing rapidly (like in: you battle to wade across): Do not cross.

Not to forget: Check for potentially hazardous aquatic life before you enter the water. Don't ride around off Fish Hoek beach!
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Offline XXL

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Re: When is a water-crossing to deep?
« Reply #5 on: January 14, 2010, 08:12:46 am »
When your prospects of completing your trip after the river crossing are zero.....or you can't see the crocs!
 

Offline Watty

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Re: When is a water-crossing to deep?
« Reply #6 on: January 14, 2010, 08:36:03 am »
Also visit this older post regarding the subject in the Riding Tips and Training Section:

Water-crossings - how to get across
 

Offline topbox

Re: When is a water-crossing to deep?
« Reply #7 on: January 14, 2010, 09:29:55 am »


the water on the bank he is approaching looks low  ???


would like to see that from the side.   ???
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Offline Hondsekierie

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Re: When is a water-crossing to deep?
« Reply #8 on: January 14, 2010, 09:35:53 am »
Is that the snorkel on his back??
“There is a pleasure in the pathless woods,
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By the deep Sea, and music in its roar:
I love not Man the less, but Nature more"
 

Offline bradleys

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Re: When is a water-crossing to deep?
« Reply #9 on: January 14, 2010, 09:51:24 am »
Looks as if he has a rope around his shoulder for just in case he bins it ,he would be able to tie it to the bike to recover it >:D
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Offline topbox

Re: When is a water-crossing to deep?
« Reply #10 on: January 14, 2010, 10:07:36 am »
Looks as if he has a rope around his shoulder for just in case he bins it ,he would be able to tie it to the bike to recover it >:D

or dreads  O0
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Offline JohnST

Re: When is a water-crossing to deep?
« Reply #11 on: January 14, 2010, 11:00:01 am »


the water on the bank he is approaching looks low  ???



would like to see that from the side.   ???

Or its the tail of a croc.
Bakkie hater!!
 

Offline Hondsekierie

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Re: When is a water-crossing to deep?
« Reply #12 on: January 14, 2010, 11:34:26 am »
Did a water crossing the other day and flooded the bike as I was too lazy to do the walk and thought i'll follow the KTM, which I knew, has a much higher air intake :dousing:

Luckily I cut the motor as soon as I saw the water entering the air intake (still 20m to go) - drained the oil, flushed it with 3 x 5L paraffin & 8L of oil to get rid of the water and make the Boxer happy again.


QUESTION

If I continued without cutting the motor (thinking R 70K the whole time), what would the end result have been???

Some ppl told me afterwards that I should have kept it pinned as the water would work it's way out of the engine - me finks this would have been one seriously stupid option,

Some experience / knowledge from the peanut gallery much appreciated
 
« Last Edit: January 14, 2010, 01:20:23 pm by HSK »
“There is a pleasure in the pathless woods,
There is a rapture on the lonely shore,
There is society, where none intrudes,
By the deep Sea, and music in its roar:
I love not Man the less, but Nature more"
 

Offline Hondsekierie

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Re: When is a water-crossing to deep?
« Reply #13 on: January 14, 2010, 01:21:39 pm »
Somebody please answer my question :3some:
“There is a pleasure in the pathless woods,
There is a rapture on the lonely shore,
There is society, where none intrudes,
By the deep Sea, and music in its roar:
I love not Man the less, but Nature more"
 

Offline Eisbein

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Re: When is a water-crossing to deep?
« Reply #14 on: January 14, 2010, 01:25:58 pm »
Somebody please answer my question :3some:

If it wasn't stressed it would probably just kill the engine.

But then you'd have water in the chambers and on trying to start it it would either strip the ring gear or broken the conrods.

To keep that from happening you would have need to take the sparkplugs out and slowy (by hand) turn the motor to get the water out.
02/02/12 - RIP Glen - the Arrow of Elliot and the little man with the big heart that truly was larger than life.

You have touched us and left us better for having known you - even if it was only briefly.

For grabbing the moment and living the day It's been way too early that you were taken away
 

Offline Operator

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Re: When is a water-crossing to deep?
« Reply #15 on: January 14, 2010, 01:31:09 pm »
I've seem a guy just taking the sparkplugs out of the boxer engine, and pushed the starter button a few times................water squirted out of the sparkplug holes ...............replaced the sparkplugs again..............press starter button...........bike stuttered a bit ..............then started and proceeded with no problem.

It was an older bike with carburettors.
 

Offline Hondsekierie

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Re: When is a water-crossing to deep?
« Reply #16 on: January 14, 2010, 01:33:41 pm »
And how far can you go with the 'watery oil'?
“There is a pleasure in the pathless woods,
There is a rapture on the lonely shore,
There is society, where none intrudes,
By the deep Sea, and music in its roar:
I love not Man the less, but Nature more"
 

Offline Eisbein

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Re: When is a water-crossing to deep?
« Reply #17 on: January 14, 2010, 01:35:49 pm »
I've seem a guy just taking the sparkplugs out of the boxer engine, and pushed the starter button a few times................water squirted out of the sparkplug holes ...............replaced the sparkplugs again..............press starter button...........bike stuttered a bit ..............then started and proceeded with no problem.

It was an older bike with carburettors.

I've seen the same thing on 1150's with EFI.

The carb's shouldn't make a difference in how the water gets sucked into the chambers

02/02/12 - RIP Glen - the Arrow of Elliot and the little man with the big heart that truly was larger than life.

You have touched us and left us better for having known you - even if it was only briefly.

For grabbing the moment and living the day It's been way too early that you were taken away
 

Offline Eisbein

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Re: When is a water-crossing to deep?
« Reply #18 on: January 14, 2010, 01:36:46 pm »
And how far can you go with the 'watery oil'?

That would be an issue.

BTW when you had the close call - could you see water in the oil as you drained it ?

02/02/12 - RIP Glen - the Arrow of Elliot and the little man with the big heart that truly was larger than life.

You have touched us and left us better for having known you - even if it was only briefly.

For grabbing the moment and living the day It's been way too early that you were taken away
 

Offline RobC

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Re: When is a water-crossing to deep?
« Reply #19 on: January 14, 2010, 01:58:06 pm »
The biggest concern is when one gets water in the cylinder, that bends and breaks stuff if you do not drain it out.
A bit of water in the oil out in the sticks is not a big issue as the engine heat will eventually boil it off and it will exit via the breather as steam. Just ride the bike at a sedate pace untill the oil starts to get less "milky"
When you get back to civilization (or if you have supplies with you, although not likely) drain the oil asap, fill with a cheapie type, run the engine till hot, drain and fill with the oil of choice.
Do not let the bike stand with water in the oil, there may be corrosion even after a few hours.
Side note... I saw on the Dakar summary that one of the Toyota Cruisers had rolled and gotten oil in the cylinder... can also ruin one's trip.