crank case breather tube - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

 
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post #1 of 9 Old 11-03-2015, 10:00 AM Thread Starter
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crank case breather tube

Think I have named this one right. It is the hose coming out the top back of the crank case going up to the air box.

Did the gen 1 have a clamp on the bottom of this hose?

I seem to be leaking some oil out of the bottom of the hose and do not see a clamp. I wonder if it should have one.

Crash
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post #2 of 9 Old 11-03-2015, 11:06 AM
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Crash,
The Gen1 and Gen2 parts screens only shows 1 clamp at the top.
The Gen2 in the shop only has a top clamp.

Clamp it if you feel the need.

pdwestman
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post #3 of 9 Old 11-03-2015, 03:30 PM
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My Gen 1 only has clamp on the top. Think I may have just put a plastic tie on the bottom.

My Kaw Barn - 2004 KLR, 2006 Concours (sold), 1997 Bayou 400.

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post #4 of 9 Old 11-03-2015, 04:59 PM
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There is no pressure on the hose so only the need to keep it from being shaken off.

FWIW, have a look at the air box nipple onto which the hose fits. It has only a tiny hole.
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post #5 of 9 Old 11-03-2015, 07:34 PM
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Quote:
Originally Posted by Normk View Post
FWIW, have a look at the air box nipple onto which the hose fits. It has only a tiny hole.
And if I remember correctly a very coarse 'foam filter' in that nipple!
And I think that the Clean Side drain nipple that the hose runs down by the brake pedal, has a 'foam filter' in it also. WHY?

Don't blow on them/at them with Hi-Pressure air, I don't think even my hand is small enough to re-install them. (Would have to be thru the carb air duct.)

pdwestman
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post #6 of 9 Old 11-03-2015, 08:01 PM
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Quote:
Originally Posted by pdwestman View Post
.........And I think that the Clean Side drain nipple that the hose runs down by the brake pedal, has a 'foam filter' in it also. WHY?

Don't blow on them/at them with Hi-Pressure air, I don't think even my hand is small enough to re-install them. (Would have to be thru the carb air duct.)
I think the filter in the nipple for the drain line in the clean air side is to keep dirt form being sucked in if the plug is left off the line or the line is snagged by brush and ripped off. That dirt could go straight to the rings and as you say "Once dusted all ways dusted".

In my case when the drain line got ripped off it took the nipple with it. The solution for this is to drill a 1" hole in the top of the box above the nipple opening. Drill down through this opening and through the nipple opening with a long 5/16" bit. Cut the valve stem out of an old tube. Slide the stem over a coat hanger as a guide and drop it down through the bottom of the air box and put a nut on it. Put some RTV on the threads and slide a hose on it. Put a plug in the hose and an inline filter if you like. Put a 1" plug from a parts store with some RTV in the top hole and you are done.
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post #7 of 9 Old 11-04-2015, 10:36 AM
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I'm just guessing that they inserted the foam into those fittings in case the hose comes off? It is a reassuring thought but why anticipate having a hose off? Doesn't really work for me either.

The caution regarding high pressure air is very well taken and one which I am remiss in not mentioning to others. It just seems so obvious because I know the filter is there...if didn't then might blow the fitting out.....excellent point and, as usual, much appreciated.




Quote:
Originally Posted by pdwestman View Post
And if I remember correctly a very coarse 'foam filter' in that nipple!
And I think that the Clean Side drain nipple that the hose runs down by the brake pedal, has a 'foam filter' in it also. WHY?

Don't blow on them/at them with Hi-Pressure air, I don't think even my hand is small enough to re-install them. (Would have to be thru the carb air duct.)
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post #8 of 9 Old 11-04-2015, 12:17 PM
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I just took my "clean side" drain tube right off and capped it 'cause I don't like the idea of there being any chance of dirty air being introduced into that area. None of my "real" dirtbikes ever had a clean side drain so I've considered it superfluous! :-)...no issues with it so far.

Dave
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post #9 of 9 Old 11-04-2015, 04:55 PM
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I do the same on any bikes for which the owner will agree. Most of the KLR which come here have either the plug or drain bottle missing.




Quote:
Originally Posted by DPelletier View Post
I just took my "clean side" drain tube right off and capped it 'cause I don't like the idea of there being any chance of dirty air being introduced into that area. None of my "real" dirtbikes ever had a clean side drain so I've considered it superfluous! :-)...no issues with it so far.

Dave
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