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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 04-13-2008, 06:59 PM   #1 (permalink)
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oil leaking from breather hose

Does anyone else get oil out of the breather hose? Mine has been laid pretty much flat for a while, near the swingarm axle, but I just rerouted it up above the carbs/airfilters. Hopefully that will help eliminate the oil leaking out of it.

It's been leaking out of the breather just about everytime I ride it. At first, I thought I had an oil leak at a gasket or something, and I just noticed today that it's coming from the breather.
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Old 04-13-2008, 07:19 PM   #2 (permalink)
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Jeff,I have one of those little chrome filters on the shortened vent pipe.It lays almost flat on top the tranny case and has an oily "high water mark" from the hose level down.I had trace oil in the airbox when I removed that too.I vote normal.
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Old 04-13-2008, 07:54 PM   #3 (permalink)
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it's been leaking down the back of the case near the swingarm pivot, down the engine, and onto the ground. Drips a few drops when parked after a ride, some oil misting on the bottom of the bike. I cleaned it up pretty good and relocated the breather tube up high, hopefully it will stop, otherwise I'll get a catch-can of some sort.
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Old 04-13-2008, 09:01 PM   #4 (permalink)
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Jeff
I get the same thing.
I have the hose tucked up behind the side cover with a filter on the end of it.
I forgot to put the hose back on the case one time and when I got back
from my ride I had oil spray all over the case under the carbs.
Do you have a filter on the end of the tube?
Where mine is behind the side covers it is higher then the case where the hose
attaches. and I don't have a problem I guess it gravity drains back in to the case.
I also used to get a lot of oil in the stock air box.

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Old 04-13-2008, 09:03 PM   #5 (permalink)
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I was getting a fair amount of oil out the breather and finally built up a little catch box that allows me to drain the oil out on my terms and not mess up the wife's beautiful driveway. I was told that 2001-2002 always did this (although I picked a new oil seperator that I'll try out when I get into the clutch housing).
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Old 04-13-2008, 09:03 PM   #6 (permalink)
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Quote:
Originally Posted by bonnevillebilly View Post
Do you have a filter on the end of the tube?
yes, I have the little K&N filter that came with the airbox removal kit.

I have it routed up above the carb air filters now, just under the frame downtube. Hopefully that will fix the problem.
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Old 04-13-2008, 09:14 PM   #7 (permalink)
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I did some searching and found this on a Buell forum:





"My $5 catch can.

I hollowed out a huge fuel filter and drilled a hole in the top and bottom for a small K&N filter and a drain. The yellow thingie is a plastic pot scrubber I used as a filter media for the spooge. The drain is a vacuum fitting I glued on. "

looks like a good solution
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Old 04-13-2008, 09:29 PM   #8 (permalink)
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That is kind of a nice solution. I used a small metal box used for circuit breadboarding (hey I'm an electrical guy at heart!). You might want to still route a hose from the bottom fitting back and up, otherwise you will just dump the oil out the bottom fitting. A small valve will let you drain when/if you see oil rising in the outlet hose. FWIW I tried the filter up between the carbs and ended up with very oily carbs; my bike seems to really put a lot of oil out the breather. My airbox was pretty full when I pulled it out an did the airbox elimination kit.
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Old 04-13-2008, 09:43 PM   #9 (permalink)
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I think the next time I get an itchin' to go to the auto parts store I'll buy the stuff to make this catch can. Sounds like a good beer drinkin' project.
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Old 04-14-2008, 06:29 AM   #10 (permalink)
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i get the same thing with my breather it lays down flat with a k&n filter on the end it leaks a bit.it has been like it since i put on my 39's.putting it up a bit higher should sort it check out vertwrks solution(or vrtwerks not sure but you know who i mean i think)very neat.
i'll be doing the same thing when i get time.when that job has priority i'll be a happy man!
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