Oil from left carb!!!

[Julio A.]

After a long ride I noticed oil on my left boot.
It was dripping from the left side carb. I had a
look at the air filter box , it might have been filling with oil
again but upon inspection it was clean as a whistle.    

I took a picture of it and attached it to this post, If that could help.  
may dad cleaned the R65 while I was away for the week. Now I can't
find the source of the oil.

I did noticed the R65 tends to blow oil at random places when I take it out for a 2~3 hour ride. But when it is not used for a while, it does stop leaking.

  

[Bob_Roller]

'They all do that'.   [smiley=ROTFLMAO.gif]


It's a pretty common 'problem', the crankcase breather vents into the rubber airhorns in the airbox .

I don't know why, but it seems that the left carbs drip the most oil .

I tried a tip that was supposed to reduce the amount of oil in the airbox .

It required you to remove the breather housing next to the starter and put a portion of a copper pot scrubber in there .

The theory was that most of the oil is in an atomized state, the pad gives the oil something to collect on, before it goes to the airbox .  

[Rob Valdez 79 R65]

Mine did that, too, back in the old days.
I rerouted my crankcase vent to atmosphere.

Bob's idea is easier.

You might need to replace the breather housing gasket if it doesn't come apart easily.  You could probably make your own, easily.

[R65Guy]

See the hose clamp on the right side of the photo? Remove it and flip it over so the screw is at the top instead of the bottom.  That should help - a lot.
Neal

[nhmaf]

My 82 LS will also do this after some sustained (~2+ hour) riding, especially if I'm running 70+MPH.   I've got to take a little time this winter and do the treatment that Bob describes - many have claimed that it reduces, if not eliminates, this problem.   Also, maintain your oil level at the "midpoint" between the low and full marks -it seems most airheads will puff out more oil this way if the oil level is higher, but once it is down somewhere near the mid point the amount of oil puffing out is typically much less.   Be sure to check your oil level properly with the dipstick unscrewed and resting at the top of the threads.

[Barry]

As everyone has said they all do that.

In other earlier mainstream airheads the engine breather discharged to one carb only but all R45/R65's discharge to both carbs and yet I've seen several reports that suggest the left carb is favoured including mine.

Make sure the discharge hose is centred in the air inlet to give the oil vapour the best chance of being pulled into the engine without condensing. The hose end should be cut at 45 Deg and not touching the sides.  

I'm going to try Bob's mod too when I get around to it.

[Sergeant_Joe]

I had this happen on my LS, it turned out to be the oil temp sender that pokes out the left side of the engine just in front of that carbie.
Take it out and clean it with a rag, put it in your mouth thread first, blow as hard as you can.
Now you will see oil has come out from under the bakerlight stuff that seals the spade connector that the wire slips onto .
They fail here big time, under engine presure it will blow a slow stream of fine atomised oil onto your left side Bing.
This will look like your bing is leaking oil.
Only fix for this is buy a new one.
Hope this helps, and don't go sticking steal or other metal wool into your intake tract, it will make it's way too your pistons at some point.

[Sergeant_Joe]

And look at your photo, you can see the oil burn marks on your exhuast pipe (those discoloured patches) they are directly under the oil sender unit . Coincidence?...I think not.

[Semper Gumby]

Park it on the center stand might also help.  Something else helped this a bit...I think I turned my plastic intake elbow tubes around.  I know that sounds crazy but I did and it did.

Let me go look to be sure.   8-)

Yesh!  What I did is turned the plastic elbows around so that the hose rubbers are on either side of the carb and the wide end of the plastic elbow is up around the steel tube coming out of the Airbox.  What this does is to seal the intake tube so OIL that runs down the intake tube to the carb doesn't come out between the tube and the carb and run down to the bottom of the carb and leak on your foot!  Crazy but it works.  Of course what this means is that all that oil that leaks out will go through the carbs instead.  

One consequence of this may be that my diaphrams have lasted a long time.