Getting your bike wet

Mouse

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After reading a thread in the 1200 section I've been thinking about water crossings, and the need to protect the engine against sucking in water through the rather oddly placed air intake (I believe it's in roughly the same place on all recent GSs - above one of the cylinders).

I did a bit of searching and found that some people were expressing worries about other potential problems that could arise from partially immersing a running bike in water.

So to sum up - have I missed anything here - the potential problems from riding through water:

1 - The big one - water being drawn into the airbox and thus into the engine, causing hydraulic lock.

2 - The catalytic converter could be damaged by contact with cold water.

3 - Water getting into the electrics, especially the spark plug caps.

4 - Someone expressed worry about the effects on the engine if a hot cylinder is suddenly hit by a load of cold water ... would the thermal effects (for example contraction of cylinder barrel around a moving piston) really cause problems?

5 - Water ingress down the exhaust pipe, damaging catalytic converter even more, possibly entering engine?

6 - Long term damage caused by water in wheel bearings, swingarm pivots etc.

7 - Goldfish shoals nibbling at your toes.


So my question is twofold - How many of these concerns are valid? Am I just asking for a world of pain in riding my bike through water, even if I take precautions against water entering the air intake?

Secondly, what are the requirements for a decent snorkel design? Would it be possible to make one that is permanently attached, or should it only be employed for the watery bits? Presumably the diamater of the tube used is important, as it has to allow the same amount of air to flow as the standard intake - are there other factors?

This is all a bit academic at the moment, but I'd be interested to hear your thoughts :)
 
Has the 1200 got a rear drive breather like the 1150's ?
 
Your water obsessed, Mouse!

'Mr Mouse...switch off the bike and move away from the ford!' :D
 
Dr Rich said:
Your water obsessed, Mouse!

'Mr Mouse...switch off the bike and move away from the ford!' :D

If I switch off the bike, how can I move away from the ford? You don't expect me to ... walk?

PS - Slimie - thanks for the link, interesting reading.


By the way, it occurs ot me that the front page to this very site has the solution clear as day - see this dude, his air intake is well out of the water :D

image_1.jpg
 
Mouse said:
After reading a thread in the 1200 section I've been thinking about water crossings, and the need to protect the engine against sucking in water through the rather oddly placed air intake (I believe it's in roughly the same place on all recent GSs - above one of the cylinders).

I did a bit of searching and found that some people were expressing worries about other potential problems that could arise from partially immersing a running bike in water.

So to sum up - have I missed anything here - the potential problems from riding through water:

1 - The big one - water being drawn into the airbox and thus into the engine, causing hydraulic lock.

2 - The catalytic converter could be damaged by contact with cold water.

3 - Water getting into the electrics, especially the spark plug caps.

4 - Someone expressed worry about the effects on the engine if a hot cylinder is suddenly hit by a load of cold water ... would the thermal effects (for example contraction of cylinder barrel around a moving piston) really cause problems?

5 - Water ingress down the exhaust pipe, damaging catalytic converter even more, possibly entering engine?

6 - Long term damage caused by water in wheel bearings, swingarm pivots etc.

7 - Goldfish shoals nibbling at your toes.


So my question is twofold - How many of these concerns are valid? Am I just asking for a world of pain in riding my bike through water, even if I take precautions against water entering the air intake?

Secondly, what are the requirements for a decent snorkel design? Would it be possible to make one that is permanently attached, or should it only be employed for the watery bits? Presumably the diamater of the tube used is important, as it has to allow the same amount of air to flow as the standard intake - are there other factors?

This is all a bit academic at the moment, but I'd be interested to hear your thoughts :)


Buy a proper dirtbike...................
 
Mouse said:
4 - Someone expressed worry about the effects on the engine if a hot cylinder is suddenly hit by a load of cold water ... would the thermal effects (for example contraction of cylinder barrel around a moving piston) really cause problems?

Does this mean cleaning your bike with a garden hose right after riding it would not do any good at it. Used to do it all the time during this salty winter without any (noticable) negative effects so far. Any other experiences?

Cheers

Demito
 
Re: Re: Getting your bike wet

JohnnyBoxer said:
Buy a proper dirtbike...................

I don't wish to be rude but why bother posting this "advice". I'm asking sensible questions about the capabilities of the GS (this is a GS forum after all) - if I wanted advice about using a KTM off road I'd go visit a KTM forum.

Or should everyone who ventures off the tarmac on their GS just give up and "buy a proper dirtbike" ?
 
Re: Re: Re: Getting your bike wet

Mouse said:
Or should everyone who ventures off the tarmac on their GS just give up and "buy a proper dirtbike" ?

'Proper dirt bikes' have just the same issues with water - just deeper!

BTW I consider the GS a proper dirt bike, it's heavy that's all.

The odd moderate ford or river crossing aint going to do much damage - just like riding in heavy rain. (See BMs brochures!)
 
Re: Re: Re: Getting your bike wet

Mouse said:
I don't wish to be rude but why bother posting this "advice". I'm asking sensible questions about the capabilities of the GS (this is a GS forum after all) - if I wanted advice about using a KTM off road I'd go visit a KTM forum.


Go on Mouse...................can you recommend a good KTM Forum...only found KTM Talk and Thumpertalk and they're both USA based.................do you know any UK KTM ones then
 
WADING

Honest John says , slip the clutch and keep the engine turning over fast to prevent water entering the exhaust. However immersing the catalytic converter in cold water will ruin it.
I read of C/Cs being removed altogether?
 
What would be the effcet of ruining the cat? Will it juts not function, or will there be affects on running the bike? Ie: is it worth worrying about in reality?
 
Slimie said:

This thread shows my 'pennytech mod' with photos attached. It really is a straight forward and cheap mod that works extremely well. I do not have it attached all the time but can easily push fit the pipe into the snorkel when required. A band of draft exclusion tape around the end of the pipe ensures adequate sealing.

Some have suggested a small pipe from the drive breather running up the frame.

The question re the CAT is interesting but as I have a Y-pipe of no concern to me!

The plug caps are a good seal anyway and can be greased to ensure this.

A good silicone spray on electric connectors etc should be OK.

Then just GO DO IT! After all you have seen the pics on the above thread at the German Heichlen Academy and the 'water depth charge wheely pic' is our own SA BMW Academy man Jan du Toit!
 
Re: WADING

P.J. said:
Honest John says , slip the clutch and keep the engine turning over fast to prevent water entering the exhaust. However immersing the catalytic converter in cold water will ruin it.
I read of C/Cs being removed altogether?

2 questions here:

1/ Immersing, does that mean getting it wet on the inside (by taking water in the exhaust pipe) or is does a simple "external" immersion cause a thermal shock that will ruin it?

2/ is the slip clutch at high revs method a proven way to prevent water in the exhaust or is just an idea? Anyone tried a sort of exhaust snorkel?


Cheers

Demito
 
If you have been on the BMW off road course, you have seen what the GS's can take.
 
WADING

"Thermal Shock" will ruin the C/C
Fast idle, or turnover, will prevent water from entering the 'zorst.
Note the guy slipping the clutch in the deep wading pic.
 


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