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Lubrication and Lubricants You guessed. Here is where everyone can argue over oil.

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  #11  
Old 30th August 2012
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JohnK, wery educational thnx, rep sendt your way.

I have a question, will a Buell oil pump fit a sporty? (just curious )


My experience with oil: I have used for the last 5years Full synt and 5W50 usually Mobile1, never had any blowby issues.
I tested with Pennzoil 20W50 just to see if engine temp went up, the temp rised in average of 15*C but most important I discovered blowby and as my engine never have dripped any oil I havent had to refill any oil between oil changes, now I checked yesterday and refilled 1/4 metric liter and this Pennzoil experiment has lasted for a month. Il change back to full synt in the weekend.
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  #12  
Old 30th August 2012
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Another confusing point, at least on rubber mounts is the stated oil capacity of 3.6 qts. That is the capacity of the system, but due to the way the oil system is designed you can only drain out what oil is in the tank, (about 3 qts.). That leaves an additional 0.6 qts. in the motor. So if you add 3.6 qts. during an oil change, you will end up with 4.2 qts. in the motor.....too much.

So, to put it simply, only refill with as much as you can drain out, and no more than 3 qts. Even if you scavenge, (another story!), you should still only end up with 3.6 qts. total.
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  #13  
Old 30th August 2012
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Quote:
Originally Posted by JohnK View Post
The oil level in the tank holds little relevance, since these engines run a dry sump oiling system and the tank is a completely separate reservoir from the engine. The oil blowby is a symptom of poor oil circulation, in particular, the return (drain) path from the top end and an inadequate scavenge section. There is no rhyme or reason why keeping your oil at the midpoint of the dipstick should prevent oil blowby, you are treating the symptom, not the problem. Although it appears to minimize blowby in many cases, there is no logical explanation why it does so, at least none that I've read so far.

From all the accounts I've read here on XLForum, blowby, and wet-sumping (which I believe are problems with the same root cause) have the common theme of high rpm runs, which appear to overwhelm the scavenger pump. We all know that these engines are mechanically capable of running higher rpms, why are they rev limited where they are? Why are the Buell limiters set higher? Why do the Buells have a different oil pump?

HD's oil level recommendations are just a bandaid to mask the problem, it just happens to 'correct' the issue (most of the time) and puts the responsibility on the owner to prevent it. They won't correct the problem(s) because it is not cost effective for them, the Sporty is not their gravy train, they don't care.
Good info.

There is theory and there is reality.

Reality is that on most bikes if you follow the manual and keep the oil midway between the add mark and the full mark, AND use the correct viscosity for the temperatures you start and ride the bike in, you will have negligible blow-by, even when running hard.
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  #14  
Old 30th August 2012
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Quote:
Originally Posted by threat357 View Post
for '04 and newer.

'03 and earlier got checked upright if I'm not mistaken.

Just throwin' that out there.
Good on you for writing this up, btw. Seems an awful lot of sportster riders are freakin' out thinkin' they have motor problems just because they find a little oil around their air filter area.
Correct, for the 2001 anyways, it states to check in an upright, level position.
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  #15  
Old 30th August 2012
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All good information here for sure. And all this fuss is caused by the head breathers that are poorly made and poorly located. I just replaced mine recently and she's back to running like new again. One of them had actually fell apart and the foam oil seperator just fell out......Like someone always says, Most Sportster problems are self induced..
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  #16  
Old 5th September 2012
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Quote:
Originally Posted by chrissenator View Post
I have a question, will a Buell oil pump fit a sporty? (just curious )
As far as I know it is a bolt on item for the rubbermount EVOs, the fittings may need to be swapped. There are some posts here that make mention of this 'upgrade' with positive results. The Buell pump has a larger scavenger and smaller pressure section. Don't know the part number but it's noted in at least one of the threads.
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  #17  
Old 5th September 2012
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Quote:
Originally Posted by FastNLoose View Post
I have a thermometer dipstick without markings( bought it that way). Do you have an idea how I know when it is filled correctly? Is their a measurement from the top of the tank or dipstick flange. I have a 1986 883.
I'm not sure if they have always done it but on my thermometer dipstick for my 2009 there are 2 faint rings, upper and a lower. those are your marks. took me forever to see them. never knew it had marks until just recently.
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  #18  
Old 5th September 2012
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Quote:
Originally Posted by CoffeeGrinder View Post
Correct, for the 2001 anyways, it states to check in an upright, level position.
on my 98 I do it on the side stand on level ground at the bottom mark on the dip stick
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  #19  
Old 5th September 2012
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Quote:
Originally Posted by shotgun46 View Post
on my 98 I do it on the side stand on level ground at the bottom mark on the dip stick
suppose if you're only filling to the bottom mark you're ok, because the '98 should be checked UPRIGHT and level.
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  #20  
Old 5th September 2012
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Quote:
Originally Posted by threat357 View Post
suppose if you're only filling to the bottom mark you're ok, because the '98 should be checked UPRIGHT and level.
3 Quarts on the side stand on level ground puts it at the perfect level
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