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13th August 2012
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Biker
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Join Date: Aug 2012
Posts: 3 Sportster/Buell Model: xlch Sportster/Buell Year: 1974
Reputation: 10
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over oiling
I need some help> im kinda new working on the ironhead. bought a 74 sportster XLCH a month ago thats been sitting for 15 years. freshened it up with new everything!!! exept the motor. its untouched. go it ridable new oil-the whole works all oil levels correct. 10 miles primary/trans very low and oil tank over full? so drained tank to proper level filled trans. and 10-15 miles later.....same thing??? any 1 with idias? thank you.
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13th August 2012
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XL FORUM TEAM MEMBER
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Join Date: Jan 2009
Location: In a swamp
Posts: 6,138 Sportster/Buell Model: XL1460C Sportster/Buell Year: 2000 Sportster/Buell Model #2: XL1200R Sportster/Buell Year #2: 2006 Other Motorcycle Model: XLH Other Motorcycle Year: 1972
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Crankshaft seal may be allowing cross contamination, but it usually works in the reverse. I haven't gotten into my '72 I.H. yet, (been under a blanket since '89, so I'm not well versed on them.
__________________
I.B.A.#26543, Old age and treachery ALWAYS overcome youth and skill! ******** Growing old-Mandatory/ Growing up-optional. Men do not quit playing because they get old, they grow old because they quit playing
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13th August 2012
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Biker
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Join Date: Aug 2012
Posts: 3 Sportster/Buell Model: xlch Sportster/Buell Year: 1974
Reputation: 10
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ok.... im ton sure if i should pull enine and do a total rebuild???
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13th August 2012
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XL FORUM TEAM MEMBER
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Join Date: Jan 2009
Location: In a swamp
Posts: 6,138 Sportster/Buell Model: XL1460C Sportster/Buell Year: 2000 Sportster/Buell Model #2: XL1200R Sportster/Buell Year #2: 2006 Other Motorcycle Model: XLH Other Motorcycle Year: 1972
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We have and excellant group of Ironhead riders that know every nook and cranny of I.H.'s, they'll be along shortly, be patient. When I pull the blanket off mine it will be comforting to know the skills and experiences they have shared, and I know they will be a big help for me.
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13th August 2012
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Biker
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Join Date: Aug 2012
Posts: 3 Sportster/Buell Model: xlch Sportster/Buell Year: 1974
Reputation: 10
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I have leaned a lot so far but not nearly enough!  im an auto tech by day and rookie bike builder at night. dont understand how the trans wud push oil to engine side?? unless the oil pump pulls il threw a bad seal. rely dont want to pull the engine apart without some knowledge of wats going on. i feel its soon to come. thanks again. |
13th August 2012
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XL FORUM TEAM MEMBER
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Join Date: Jan 2009
Location: In a swamp
Posts: 6,138 Sportster/Buell Model: XL1460C Sportster/Buell Year: 2000 Sportster/Buell Model #2: XL1200R Sportster/Buell Year #2: 2006 Other Motorcycle Model: XLH Other Motorcycle Year: 1972
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That was my thought exactly,usually its a crankseal failure and the crankcase pressure pushes engine oil out to the primary cavity.
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14th August 2012
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Senior Chief Harley Engineer
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Join Date: Jan 2010
Location: Allentown PA Area
Posts: 1,033 Sportster/Buell Model: Sportster XLH1100 Sportster/Buell Year: 1986 Other Motorcycle Model: Rupp Roadster Other Motorcycle Year: 1971
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If the tranny vent is plugged (dirt, bugs, etc etc) the tranny can build up presure from the air expanding when it gets warm. (trust me, I pinched the hose they used on the '86's under the seat when I put the seat back on.....)
I'm not saying that's your problem, but it may be someplace to start at.
__________________
1986 XLH 1100 (fixer-upper) // Engineers design things, Technicians make them work. --- 30% of being mechanical is confidence/30% is knowing to go slow when needed/30% is looking repeatedly at what you have/10% is dumb luck .
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16th August 2012
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Senior Chief Harley Engineer 1st Class
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Join Date: Oct 2009
Location: Minnysoda
Posts: 1,357 Sportster/Buell Model: AMF XLS Roadster Sportster/Buell Year: 1981
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Post this in the ironhead section......
.........and your problems will be solved.
Sounds like a check valve is fubared.
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Question Authority
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16th August 2012
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Senior Master Custom Bike Builder
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Join Date: Dec 2007
Location: Australia
Posts: 7,952 Sportster/Buell Model: XLCH 1000 Sportster/Buell Year: 1977 Sportster/Buell Model #2: 75 motor in Norton frame. Other Motorcycle Model: 42WLA 45, Harton, Narley Other Motorcycle Year: 1942
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Could be sprocket shaft seal.
Could be oil transfer valve (between primary and crankcase).
Both those are easy to fix. More info on the oil transfer valve over in the Ironhead section.
If you post future queries in the Ironhead section you will get more response.
__________________
In theory there is no difference between theory and practice. In practice there is.
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