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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #1  
Old 4 Days Ago
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Default 73 XLH puking oil out of breather/crankcase

So Monday after riding for 40 minutes I parked my bike and after about 20 minutes I notice a patch of oil about the size of drink coaster under my bike (by chain drive). I rode home and noticed a funky noise when coasting to stop in every gear. Sounded like the heads were workin hard, almost like the pistons were going to blow out the top. Oh no we’re out of oil I thought. Got er home n parked (no drip this time) and bought oil the next day n threw it in. Went for a ride yesterday and only went about 2miles. I punched it and noticed it jolted and slowed down and the top speed was not the same. Came to a stop and felt like it was going to die if I didn’t blip the throttle. I let it die then sat for a smoke for about 10 minutes. Came back and noticed a giant puddle under my bike (same spot from the other day and breather). Said a few cuss words and started rollin her home. Got tired said xxxx it and turned it on. Sounded fine, put her in first and as soon as the gear grabbed I heard a terrible shredding noise and shut it off immediately. Walked it home and barely any oil in the tank. Did I just blow my engine?
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the puddle near the rear sprocket is probably a tell that it's transmission related. especially with screeching noises when put into gear. i would definitely recommend not running it anymore, until you discover the cause of that noise and oil leak...
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I won’t, was wondering if it was transmission related thank you!
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I think it may be sprocket seal
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  #5  
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Default

Sounds like you have more than one problem.

The trans leak could be a really bad sign.
The motor oil level may or may not be a biggie.

Another problem you may have learned the hard way. By not checking/knowing how much oil is in it before riding.

Fill it back up with oil, both the motor and the trans/primary. And do diagnostics from that point.

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I'm betting on the problem is the 23 needle bearings are gone.
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Rick, that’s what I did after the initial coaster size leak. Yesterday I pulled the sprocket cover and notice a fresh little glob of oil by the bottom bolt hole. I’m thinkin the first leak drained it dry then the ride home made it wear the trans til it was bone dry. Which caused the noises after a while. An old timer coworker told me these iron transmissions are tough as hell, same tech as farm tractors. I’m gunna pull the sprocket and take a look inside today.
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Pulled sprocket and seal. It looks fine, But I did see a small about of oil on one of the spines if the shaft. Not sure if that is where the leak is from though. I’m thinking about ripping the primary off and pulling the trans maybe I can see if anything is messed up. Even check that 23 pin bearing while I’m at it. Merf if it is that bearing wouldn’t the noise be present when just rolling in neutral?
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The shaft you just took the sprocket and seal holder off, can you shake it from side to side?
......Davi.
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No play at all.
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