Question about Yamaha 2006 RS Venture

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Oil from oil tank breather dumps oil in air cleaner

Even when the oil is down oil spurts from the oil tank into the air box for the carbs. The oil tank has two tubes (one 5/8 and one 1/4)that run up to a valve that has one 5/8 tube running to the air box. The 5/8 tube from oil tank is the one that brings up the oil to the valve. The 1/4" has positive air pressure and also runs to valve. Any suggestions??? 1000 cc engine has 135-145 dry compression.

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  • Yamaha Master
  • 3,187 Answers

Common problems that can cause this is to much oil. engine veins blocked or the rings on the piston are gone and the back pressure from ignition creates an overflow of air into the system.

Posted on Aug 08, 2017

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Posted on Jan 02, 2017

onyeredson
  • 404 Answers

SOURCE: oil shooting in to the air box

Hello,
From your brief description I'm guessing a high mileage machine? or Previous owners have revved too much from cold?
It sounds like the engine is possibly breathing? the pistons and compression rings are worn so exhaust gasses and compression leaks past them and pressurizes the crank case sending oil out the breather, so the air filter draws it in.
If the bike is performing o.k. and you can live with it try a dribble/breather can? pop the vent pipe into a seperate container to catch it. Make sure you seal the hole in the air filter so contaminents can't get in. also the new breather needs air circulation so trial and error on a recepticle.
Good Luck!
Paul 'W' U.K.

Posted on Jan 08, 2009

  • 53 Answers

SOURCE: oil blowing out of trans breather tube

hi 81 yamaha i am concerned about the fuel smell coming out with the oil. could be the carbs flooding filling your crankcase with fuel? if not it sounds like you have blow by which would cause your crank case to be slightly pressured. this is caused by worn piston rings. do not plug your crank vent. if you leave your vent open install small filter to stop dirt from entering jim

Posted on Mar 26, 2009

  • 3 Answers

SOURCE: 2001 yz125 grey milky tranmittion oil

yesi have a yz 125 2000 and iv had the same problem to i have bin working on it for a week now and the problem is that my head gasket had blown and the comprecion from the piston was forcing the water thru the seal in the water pump be hind the little propeler in the water pump and it had gone into the clutch and when water,petrol.oil is mixed u get a grey gloopy sorta sludgy mix.drain all the oil out of it an see if there is any water bubbles in it. if not u have run the poor bike so hard u have boiled the oil just drain it and replace it.hope i helped u.

Posted on May 07, 2009

  • 3567 Answers

SOURCE: 1974 TX500, high idle, white smoke from breather tube

The idle problem is a lean fuel mix caused by an air leak in the intake system. Bad gaskets /seals on the intake manifold, bad valves, bad piston rings, loose spark plugs, and bad head gasket are all things that can lean the fuel/air mix. The smoke indicates a need for new rings. I would have the cylinders bored then install new pistons and rings. Now finish the top end work by getting a valve job. You should get a liquid fuel tank liner to eliminate any rust problems in the future. Also, install an in-line fuel filter. Google “ kreem fuel tank liner “ or go to www.http://www.4secondsflat.com/Fuel_Tank_Sealer.html


My complements on the well cleaned carbs. Do the work mentioned above an you will effectively have a new engine.

A “very helpful” rating for this answer? Thanks!


Posted on Jun 11, 2009

  • 1 Answer

SOURCE: 1978 Yamaha XT500 Oil in frame; Pukes oil up into intake...

You have to much oil in your carter.

Posted on Jul 19, 2009

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1 Answer

Way to much oil coming out air cleaner


Oil coming out of the breather is natural and normal, with basically no way to stop it. There is about 1/2 qt of oil in the bottom end of an engine, as the pistons travel downwards, the air that is under them is being pressurized and is vented out of the engine by a rotary breather valve in the case. The air picks up a small amount of oil from the bottom end as it leaves, then the air/oil mist is vented either into the air cleaner (EPA Regulations) or best if vented to the atmosphere. NOTE: WORN RINGS ALLOWINGS EXCESSIVE COMBUSTION PRESSURE BLOW-BY WILL MAKE THIS SITUATION EVEN WORSE. When it\'s vented into the air cleaner, some if it recirculates into the engine and out the exhaust, the rest saturates the air filter and then eventually gets blown all over the side of the bike. The best way to vent it, is to route a hose from the breather system down to the frame between the engine and trans, run it under the bike on the right side, point the hose down to the GROUND and zip tie it in place.



To stop the leaking breather BOLTS...remove them, and use brake cleaner to completely remove all oil from them, the washers, brackets and threads in the head. Use liquid teflon thread sealant on the bolt threads, and a light film of black rtv on the faces of all the washers and brackets, install everything, let sit for 24 hours, then ride.......if done properly and rtv is CURED, it won\'t leak.

Also note that most HD\'s with the oil tank mounted under the seat and are left sitting for a couple months will PUKE oil from the breather, this is due to the gravity....the oil will slowly seep through the oil pump and collect in the bottom of the crankcase and get blown out the breather when the bike is started.



Also:

The HD engine design is a dry sump engine, but there is always a small amount of oil in the bottom end....THIS IS WHERE THE OIL MIST COMES FROM......it is "possible" for too much oil to give your symptoms, if you have too much oil in it, the oil tank is vented back into the cam compartment, causing excessive oil build up in the bottom end, if this were the case, the oil would be PUKING from the breather, because the oil pump does not have the ability to scavenge that much oil back to the tank that quickly, which in this event, the tank doesn\'t have the room to store any way.

But even so, this is an all too common question and the symptoms are seen on almost every HD on the road.....could it be possible that EVERY HD has too much oil??? In my answer, I tried to explain WHY this happens.....even with or without too much oil.....this will still happen.

Jul 12, 2014 | 2003 Harley Davidson XLH Sportster 883...

1 Answer

Oil tank breather hose dumps oil in air box


Make sure your oil level is just below the full mark not above it.

Apr 15, 2014 | Yamaha 2005 RS Venture

1 Answer

My 1990 XT 600 is spurting oil out of the crank case ventilation breather tube into the air filter box.


Hi, Anonymous oil leaking from your air cleaner is caused by oil carryover from the engine. For whatever reason, the breather system is not separating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more expensive ones. First, make sure your breather hoses are not dry and cracked if they are ok you can start by trying the following:
1. Run your oil level half way between the add and full mark when hot.
2. Run oil breather lines from the head into a TEE fitting below carb/induction module then a single line into a mini filter under the frame.
3. Purchase Arlen Ness Super Sucker.
4. Replace umbrella valves and realign oil pump.
5. Upgrade oil pump and cam plate.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
http://myfilestore.com/download.php?id=59d6bf97
Understanding Blowby in Motorcycle Engines
Yamaha XT 600 AC Service Manual
OEM parts for Yamaha
Yamaha XT500E Owner Manual

Sep 30, 2013 | 1990 Yamaha XT 600 E

1 Answer

2009 ultra classic oil coming from carberator


Hi Jesse, oil leaking from your air cleaner is caused by oil carryover from the engine. For what ever reason the breather system is not seperating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more exspensive ones. Start by trying the following:
1. Run your oil level half way between the add and full mark when hot.
2. Run oil breather lines from head into a TEE fitting below carb/induction module then a single line into a mini filter under frame.
3. Purchase Arlen Ness Super Sucker.
4. Replace umbrella valves and realign oil pump
5. Upgrade oil pump and cam plate
Good luck

Apr 20, 2013 | 2009 Harley Davidson FLHTCU Ultra Classic...

2 Answers

Oil in air cleaner !?!?!


Does it smoke at all? It's possible that you have either added to much oil, or you have worn pistol rings and the oil is slipping past the pistons and being forced into your breather.

Nov 03, 2012 | 1991 Suzuki VX 800

1 Answer

My 2003 Sportster is leaking or pushing oil out air filter, my sportster has chrome rocker box covers but none of the rest of the engine is chrome. My mechanic says he has never seen this before.


Hi Anonymous, if it's leaking from the case seams aside from splitting the cases and resealing them is to check the torque on the case bolts 1/4" bolts/nuts 10 ft lbs. 5/16" bolts/nuts 20 ft lbs. for all other leaks the usual suspects are:
1. Loose parts.
2. Imperfect seal at gaskets, push rod covers, washers ect.
3. Restricted oil return line to oil tank/pan.
4. Restricted breather hose to air cleaner.
5. Restricted oil filter.
6. Oil tank/pan overfilled.
7. Bottom rocker housing gasket installed upside down.
Oil leaking from your air cleaner is caused by oil carryover from the engine. For what ever reason the breather system is not seperating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more exspensive ones. Start by trying the following:
1. Run your oil level half way between the add and full mark when hot.
2. Run oil breather lines from head into a TEE fitting below carb/induction module then a single line into a mini filter under frame.
3. Purchase Arlen Ness Super Sucker.
4. Replace umbrella valves and realign oil pump
5. Upgrade oil pump and cam plate
Good luck and have nice day.

Apr 24, 2012 | 2003 Harley Davidson XL 1200 S Sportster...

1 Answer

When engine is trying to start or running oil leaks out carburator area. doyou have video for step by step


If your engine has been sitting for a long period of time, your engine is probably "oil sumped". Since the oil tank is located higher on the frame than the engine, if the bike sits for a long period of time, oil will seep past the oil check ball and accumilate in the bottom end of the engine. I've seen the oil tank empty into the bottom end.

Now, the engine on your 93 model is what we call a case breather. The engine's crankcase breaker is located on the engine's cases down low. Later models are called "head breathers" in that the crankcase breathers are located in the rocker boxes, up high. So, even though the oil sumps on the later engine the oil doesn't go into the breather AS BADLY as the earlier models but it still gets in there.

Look on the back of the air breather assembly. There should be a pipe coming from the front of the engine on the timing gear cover on the right side of the engine going to the back of the air cleaner. Temporarily disconnect this pipe. Start the engine and allow it to run for a few minutes. Once the oil stops coming out of the pipe, reconnect it and disassemble the air cleaner. Clean the air cleaner. If the paper air filter is saturated, replace it. Reassemble the air cleaner assembly.

Now, Check the oil. Do not add oil to the engine as long as the oil is visible on the dipstick. Start the engine ride until the engine warms up. Now, with the engine warm, check the oil. The upper line is "Full Hot" while the lower line is "Full Cold". Set the oil level halfway between the lines. Do not overfill. If the bike is going to be sittting for a while, either drain the oil tank or start the engine about once a week and let it run for a few minutes. Do not allow it to overheat.

Good Luck.
Steve

Jun 20, 2010 | 1993 Harley Davidson FLSTF Fat boy

1 Answer

I have 2003 ninjia 250 it was running good then slow down and died. like it running out of gas. will restart with th choke on. then run for a few miles the die again. also it is sucking oil into the...


Fuel starvation most likely caused by plugged fuel filter. Best way to check/fix is to drain gas tank then remove on/off/res petcock assembly. Filter is removed with assembly and can be cleaned with carb cleaner, blown out with compressed air, and re-used. Do not get solvent or carb cleaner on any rubber parts as this will harden them. Re-assemble and start with fresh gas. Oil in breather is normal if not excessive and can be sign of clogged air filter or worn rings. Fix fuel and air filters and re-check. Good luck, Techjoel

Jun 05, 2009 | 2008 kawasaki Ninja 250R

1 Answer

Engine smoking - oil pushed through breather into carbutator


Sorry to say it is time for an engine rebuild. This occurs when the rings on the piston are worn or not sealing. There are other reasons also but all pertain to engine fatigue. Sorry I can't give you an easy fix.
Kurt

Mar 21, 2009 | Garden

7 Answers

Oil blow out the breather


This is a common problem on all sportsters, they have an oil blow by that dumps it into the air filter. I have found that if I run about a half quart low the problem goes away.

Nov 10, 2008 | 2000 Harley Davidson XL 1200 C Sportster...

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