Question about 1992 Moto Guzzi Quota 1000

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1000s breather Where should the ball-bearing valve go in the 1000s breather system? When I took the main engine breather pipe off my valve was at the top

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By the frame but from looking at old posts it seems it should be mounted into the spigot on the engine casing? Also my bike has K&N's so obviuosly the old airfilter box has been removed. Thus the vent to atmoshere which used to run through this box now simply runs down to the back of the engine. ... so my 2nd question is this... should this vent to atmosphere have a valve on it? ,The breather system should have one valve in it and it should be AFTER the breather box on the line that vents to atmosphere. THis is to stop wet cold air entering the breather box and mixing with hot oily air and making mayonaise or aioli. Guzzi's earlier attempts put two valves between the breather box and crankcase - stupid. If you're bike has the old breather box and not the breather box in the frame like the later square fins then remove them - one is hidden in the supply pipe in the breather box - remove with hammer and screwdriver. This will also stop the engine pumping oil up the return line and out of the engine. Any 4 cylinder automotive spring loaded PCV valve will do pretty well. You can improve the efficiency of the breather box by lightly stuffing it with stainless steel wool or such. If the rings are good and the sump level is right it will not drip oil IME.,,,

Posted on Nov 10, 2008

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1996 vulcan 1500a i installed harley straight pipes and took air surge tank off and installed two kand n breathers on carbs also i just rejetted my carbs with dynojet carb kit stage 1 i cant get it to run...

Really need more information, i.e., does it run bad on the primary circuit, on the main jet or both and does it accelerate good? At a high level it is going to be very lean with straight pipes and a K&N on it. I would tell you more but I am so tired of having my hearing abused by straight pipes I will pass. Put some mufflers on that rice burning irrigation pump engine between your legs.

Apr 16, 2013 | 1996 kawasaki VN 1500 Vulcan Classic

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I have a 96' evo,recently i had new head gaskets

In 1993, Harley went to the "head breathing" crankcase breathing system. The crankcase pressure is vented into the air cleaner to be routed though the engine and burned. This was a requirement mandated by the EPA. Prior to '93, the crank case vent was down behind the oil pump and a pipe directed the crankcase pressure up to the air cleaner. If you have the "head breather" heads, you'll have a large hollow bolt going to each head from the air cleaner assembly. If whoever did the top end job on your engine left the umbrella valves out, installed them upside down, or put the center plates in wrong, it could be causing your problem. If they replaced the head gasket and did not replace the base gaskets, the base gasket are going to leak. Whenever you take the torque off the head bolts, you must replace all gaskets. Additionally, if the cylinder studs on your engine have not been replaced, they are probably stretched and not holding the torque like they should. In 1996, Harley came out with an improved replacement stud for the Evo engine. The large diameter part of the stud is at the lower end of the stud rather than at the top end like the older model was. If you can't get those, Colony Fasteners makes an excellent set of studs that cost about the same as H-D parts. Blue or black smoke out of the exhaust usually indicates a rich fuel mixture.

Good Luck

Jun 27, 2011 | 1993 Harley Davidson FXR Super Glide

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Oil system manual for a 1987 softail (evolution). oil leaking from breather of engine system.

On your '87 Softail, the engine breather vent is behind and below the oil pump. The air from the breather is routed into the engine air filter by a metal pipe and rubber tubing that runs from the breather vent to the air filter. It is common to get a bit of oil in the air filter because of this system. The system was designed to meet EPA regulations of the time. Since then, the breather system has been modified to allow the engine to breathe at the top of the heads instead of down low on the engine. This resolves some of the problem with oil getting into the air filter but it still does not eliminate it. The only way to eliminate the oil from getting into the air filter is to reroute the air from the crankcase breather vent to somewhere else. Most people just let it exhaust underneath the bike by putting a small breather filter on the end of a short piece of rubber hose connected to the breather vent.

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Apr 01, 2011 | Harley Davidson FXST Softail Standard...

1 Answer

Hi, I've got a Honda 750 four K7 1977. It's got a back pressure problem where it blows oil out of the head breather. took pipe out of air box so it ewould run better, & it does, but still loads coming...

The rings or valve seals are letting the compressed fuel mix escape thereby pressurising the rest of the engine
The froth is old oil mixed with water - drain & flush engine

Sep 23, 2010 | Honda CB 750 Motorcycles

3 Answers

Where does the oil go from tank when bike sits a long time?

This is what we call "oil sumping" around here. On the soft tail line or any other line of Harley where the oil tank is higher than the oil pump, the oil will seep past the check ball in the oil pump and leak into the crankcase of the engine. When the engine is started up, it will "puke" the oil out. Now, up until the introduction of the Evo engine, the engine would puke on the ground under the bike out the breather tube. Now with the Evo engine and the EPA's regulation that crankcase ventilation fumes have to be fed back through the intake, it pukes into the breather. An even bigger mess. So, what we do whenever we think we've got this situation is put a pan under the shovelhead and panhead bikes, On the Evos and Twin Cams, we take the air breater cover and the air filter out before the fire the engine. It's a mess either way you look at it. I don't think the Twin Cams are as bad as the Evo engines due to the different type of oil pump.

Jul 15, 2010 | 2000 Harley Davidson FLSTS Heritage...

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.

Jun 20, 2010 | 1993 Harley Davidson FLSTF Fat boy

1 Answer

Fuel from engine breather pipe

There are just three ways for fuel to get into the top end. As mentioned, bad valve guides (exhaust guides are just as old as the intake guides). Bad rings with raw fuel getting past the rings. Either way, fuel is getting up there. Time for a valve job and fresh bore with new pistons and rings. If able to find the parts, I would also install new cam chain and tensioner. You have a very early CB450. Today's VIN numbers have 17 numbers. That is what didn't seem right.
Go to the site below where you can see a parts diagram for your specific bike. I already checked and a lot of parts are available for your bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock.
You can also Google 'vintage motorcycle parts honda" and find stuff there.

Top rating for this answer? Thanks!

Jun 10, 2009 | Honda CB 750F2 Seven Fifty Motorcycles

1 Answer

Where is check ball valve on my 1982 electaglide

The check ball valve is in the oil pump. When you look at the top of the oil pump, the check ball is under the innermost threaded plug, the low one, not the high one. You will have to drain the oil tank before you remove this ball. Take out the plug, the sping, and use a magnet to remove the ball. Buy two new balls, they aren't expensive.
Now, drop on of the new balls into the hole. Take a brass drift and a hammer and gently tap on the ball. This will reform the seat that the ball sits in. Remove this ball and install the other new ball, spring, and threaded plug. Refill the oil tank.
Then, remove the crankcase breather line from the rear of the air cleaner. Plug the hole in the rear plate of the air cleaner. Purchase one of the small breather filters (/V-Twin #40-0352) and put it in the end of the crankcase breather hose and relocate the breather underneath the bike.

May 27, 2009 | 2000 Harley Davidson FLHT Electra Glide...

1 Answer

Oil breather problem

keep your oil breather unblocked all the time's coz the pressure of it can destroy your gasket and oil seal.

Mar 28, 2009 | 1999 kawasaki ZX-6R Ninja

1 Answer

Leaking compression on my VR

check the valve clearance to see if one of the valves is tight To figure out whether it's the rings or the valves try this. Lock the crank with a wrench with the piston at TDC (Top-Dead-Center) and run some compressed air in through the spark plug hole. Make sure you have a good hold on the crankshaft wrench or the engine will spin throwing the wrench off ! Now listen. If you hear air coming out at the carb or air cleaner the intake valve is leaking. If at the exhaust pipe, it's the exhaust valve. If at the engine breather, it's the rings. ,,,

Nov 10, 2008 | 2000 Alfer VR 2000 Supermoto

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