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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 23rd February 2011
73Harley 73Harley is offline
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Default 73 Ironhead oil change help

Any information on changing the oil on a 73 Ironhead Harley Davidson would be great.
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  #2  
Old 23rd February 2011
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What do you want to know? Drain the oil out of the tank, refill with new.... If you are looking for specifics it would be good to know if you have aftermarket filters etc... It really is pretty straightforward though.


Just don't ask this crew which oil is best
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  #3  
Old 23rd February 2011
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Default uh-oh...

...to avoid the huge and imminent oil debate read this...
http://xlforum.net/vbportal/forums/s...88#post1959688
it has everything you're looking for, and welcome aboard from fredericksburg virginia.
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Old 23rd February 2011
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Awwww. No oil debate? Greetings from Pittsburgh.
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  #5  
Old 23rd February 2011
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On these older bikes since they didn't have a oil filter it was recommended to rinse oil tank out with kerosene that was to get the sludge from bottom of tank.
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Old 23rd February 2011
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Welcome! to the IronHead forum.

If the bike is new to you it would be a good idea to do the kerosene rinse as recommended by ezmerf one time in case it was not done in the past. With modern oils it is not necessary to do it every time.

Last edited by IronMick; 27th February 2011 at 14:39.. Reason: sp
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  #7  
Old 23rd February 2011
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I've read the sticky a few times and just to confirm that on the early models specifically with the oil transfer valve we can now use the 'new' HD transmission oils and not the same engine oil anymore as originaly spec'ed way back in the early 70's?

Also, sticky pictured "HD Formula+" and my (copyright '86) Clymer lists "HD Power Blend Super Premium oil". No oil controvery here but being careful over subtle differences between these two... if any.
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  #8  
Old 23rd February 2011
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Default Yes, oil transfer valve is SUPPOSED to keep...

...the motor & trans/primary fluids separate, by acting as a crankcase-based vent for the primary, which allows the use of the Harley Formula Plus (used to be knows as SportTrans).

Unfortunately, oil transfer valves tend to f@#k up and become two-way valves --- this allows motor oil to seep into the primary, which oil-soaks the clutch plates.
The next time you're in the primary, hit the center orifice of the valve with a spot-weld and seal the offending little shit up.
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  #9  
Old 23rd February 2011
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Quote:
Originally Posted by Mr Bentwrench View Post
I've read the sticky a few times and just to confirm that on the early models specifically with the oil transfer valve we can now use the 'new' HD transmission oils and not the same engine oil anymore as originaly spec'ed way back in the early 70's?

Also, sticky pictured "HD Formula+" and my (copyright '86) Clymer lists "HD Power Blend Super Premium oil". No oil controvery here but being careful over subtle differences between these two... if any.
The Formula+ is the choice of many on the forum and is what I use for the tranny and primary. I don't think the Power Blend is even available anymore. The transfer valve you mention does leak in many cases, so it is possible to cross dilute if you are running a different oil for the rest of the engine. Some have (ME too) sealed off the transfer valve as it was eliminated in later ironheads, and have no ill-effects.
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  #10  
Old 24th February 2011
73Harley 73Harley is offline
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Default

Thanks for the info. That helps alot. And thanks for the welcome all. This is a great site. Always owned a Japanese motorcycle so new to the Harleys. If anybodys knows where the best pricing is to get a motorcycle lift, either jack or air.
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