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Lazaruscycleworks
12-29-2013, 5:40 PM
Alright I started a 96 sportster 1200 oil in frame project a little while ago and now that I got it restarted I am in need of some help. First of all let me show you some pictures so you can see whats going on.

Oil comes out of the backbone here.

<a href="http://s75.photobucket.com/user/slothydigital/media/photo1-1_zpsde69e0e6.jpg.html" target="_blank"><img src="http://i75.photobucket.com/albums/i309/slothydigital/photo1-1_zpsde69e0e6.jpg" border="0" alt=" photo photo1-1_zpsde69e0e6.jpg"/></a>

Down into the oil pump

<a href="http://s75.photobucket.com/user/slothydigital/media/photo2-1_zps76f326b9.jpg.html" target="_blank"><img src="http://i75.photobucket.com/albums/i309/slothydigital/photo2-1_zps76f326b9.jpg" border="0" alt=" photo photo2-1_zps76f326b9.jpg"/></a>

Out of the engine here (right about in the middle of the primary)

<a href="http://s75.photobucket.com/user/slothydigital/media/photo4_zps52f5e198.jpg.html" target="_blank"><img src="http://i75.photobucket.com/albums/i309/slothydigital/photo4_zps52f5e198.jpg" border="0" alt=" photo photo4_zps52f5e198.jpg"/></a>

into the oil cooler

<a href="http://s75.photobucket.com/user/slothydigital/media/photo5-1_zps31fbb9e9.jpg.html" target="_blank"><img src="http://i75.photobucket.com/albums/i309/slothydigital/photo5-1_zps31fbb9e9.jpg" border="0" alt=" photo photo5-1_zps31fbb9e9.jpg"/></a>

Out of the oil cooler and back into the backbone

<a href="http://s75.photobucket.com/user/slothydigital/media/photo1-2_zps02e0fa60.jpg.html" target="_blank"><img src="http://i75.photobucket.com/albums/i309/slothydigital/photo1-2_zps02e0fa60.jpg" border="0" alt=" photo photo1-2_zps02e0fa60.jpg"/></a>

This is where I fill the oil up and that tube is my vent tube that normally goes to the top of the oil tank
<a href="http://s75.photobucket.com/user/slothydigital/media/photo2-2_zpsf153c3e7.jpg.html" target="_blank"><img src="http://i75.photobucket.com/albums/i309/slothydigital/photo2-2_zpsf153c3e7.jpg" border="0" alt=" photo photo2-2_zpsf153c3e7.jpg"/></a>

Now what i had been doing was running the vent tube to the top where I have been filling my oil in the picture above. But as soon as i rev it up high the motor starts to sump and oil comes out of the vents in the rocker boxes (which I had a suspicion would happen and of course did). And if I just run the vent to atmosphere and plug where I fill my oil above it blows the lines off the oil cooler. If anyone has any positive light to shine on this that would be much appreciated

Kiyo did it to this bike here in the past and seems as thought they got it to work.

http://www.chopcult.com/news/articles/sebastians-oif-sportster.html

Also this guy did it here and seems to run lines off the rocker box vents somewhere but I cannot figure it out from the pictures

http://www.bikeexif.com/asterisk-harley-sportster

I know its dumb blah blah run an oil tank. Just trying to do something a little different.

Lazaruscycleworks
12-29-2013, 8:31 PM
Im thinking the problem could be solved by ditching the oil vent and running one of these setups


http://xlforum.net/vbportal/forums/showthread.php?t=72099

BrokenSprocketGarage
12-29-2013, 9:11 PM
How much oil do you have in the system? Could be over full. You must have room for oil expansion.
Also; the oil reservoir ( backbone) and the engine(rocker boxes vents) need separate vents. So what happens if you run the engine with the fill plug removed?
The hose normally found at the stock oil tank location is not an engine vent. It is the primary/tranny vent.
Seems like your oil "tank" has no vent.
You should also add a filter on the return side.

Lazaruscycleworks
12-29-2013, 9:39 PM
It holds 2 quarts of oil. I know the reason the oil is spewing out of the intake is because oil is being forced backwards though the oil vent tube which is on the side of the crankcase on the backside of the derby cover. Which in turns comes out of the rocker vents. I have actually never seen an oil tank that was vented. The crankcase is vented to the oil tank but the oil tank is never vented. There is a stock oil filter on the feed side of the motor. What im thinking is that since the oil is never really in a resevoir it creates more pressure that needs to be exhuasted somewhere which is why I am thinking about venting the derby cover like the old ironheads have with a pcv valve.

Lazaruscycleworks
12-29-2013, 9:42 PM
If i leave the cap off oil comes out through the cap but thats mainly because the cap and the return line need to be so close due to having to fit the gas tank also.

IronHead73
12-29-2013, 9:43 PM
It holds 2 quarts of oil. I know the reason the oil is spewing out of the intake is because oil is being forced backwards though the oil vent tube which is on the side of the crankcase on the backside of the derby cover. Which in turns comes out of the rocker vents. I have actually never seen an oil tank that was vented. The crankcase is vented to the oil tank but the oil tank is never vented. There is a stock oil filter on the feed side of the motor. What im thinking is that since the oil is never really in a resevoir it creates more pressure that needs to be exhuasted somewhere which is why I am thinking about venting the derby cover like the old ironheads have with a pcv valve.

2 quarts between the entire system?

BrokenSprocketGarage
12-29-2013, 9:49 PM
Are you running the engine and primary as one oil cavity?
As stock, the primary case vent is the hose you are describing, locate behind the derby cover area.
All oil tanks must be vented. Oil hoses blow off when there is too much pressure in the system. You must vent your oil reservoir in some way.
Oil filter is supposed to be on the return side of the oiling system.

Lazaruscycleworks
12-29-2013, 10:00 PM
im going to get this out of the way so we can move past it. Oil comes out of the oil tank into the oil pump then into the oil filter then into the engine then out the return line then into the oil cooler then into the backbone.

<a href="http://s75.photobucket.com/user/slothydigital/media/ScreenShot2013-12-29at75628PM_zps2bf0b3dd.png.html" target="_blank"><img src="http://i75.photobucket.com/albums/i309/slothydigital/ScreenShot2013-12-29at75628PM_zps2bf0b3dd.png" border="0" alt=" photo ScreenShot2013-12-29at75628PM_zps2bf0b3dd.png"/></a>

In this image here where the hose clamp is to me is the oil vent tube that runs to the top of the oil tank typically.
<a href="http://s75.photobucket.com/user/slothydigital/media/photo3-1_zps25af6a3d.jpg.html" target="_blank"><img src="http://i75.photobucket.com/albums/i309/slothydigital/photo3-1_zps25af6a3d.jpg" border="0" alt=" photo photo3-1_zps25af6a3d.jpg"/></a>

Lazaruscycleworks
12-29-2013, 10:08 PM
this on the otherhand is the tranny vent

<a href="http://s75.photobucket.com/user/slothydigital/media/photo1_zps9d1f862d.jpg.html" target="_blank"><img src="http://i75.photobucket.com/albums/i309/slothydigital/photo1_zps9d1f862d.jpg" border="0" alt=" photo photo1_zps9d1f862d.jpg"/></a>

Lazaruscycleworks
12-29-2013, 10:17 PM
What I'm mainly trying to figure out is how am I going to vent the backbone without having oil spew out of the vent.

tattoo2303
12-30-2013, 12:47 AM
My 93 stock oil tank does have a vent, it's a tight 90degree nipple on the very top and the house just runs down to around the ground/swingarm

Sent from my VS980 4G using Tapatalk

BrokenSprocketGarage
12-30-2013, 7:05 AM
What I'm mainly trying to figure out is how am I going to vent the backbone without having oil spew out of the vent.

Cross drill the oil tank filler plug. Or dig into the hydraulic tank world and buy a vented plug. Seen these on a lot of log splitters, some with dip sticks attached.

IronHead73
12-30-2013, 7:11 AM
2 quarts total or just reserved in the framework itself?