Alright lets make this simple. Take two standard 6" tall glasses and fill them up ONLY 1" with oil with them sitting on a level table. Now make a cover that seals both glasses and has a tube that connects both glasses together at the top and sticks out of one end only, but not the other. Put a rod down the tube and jack it back and forth at any speed you like and tell us what happens.

Then make a second test that fills one glass up to half the diameter of the tube that connect them together with the other glass still only having 1" in it and tell us what happens with the rod being jacked back and forth.

Then repeat the last test over without jacking the rod back and forth.

Let us know once you finished the testing and supply us the results.

 

Another 100 miles on it with the UV trace in. No migration yet. The ride to dinner was worth it.

 

FWIW.. I checked my levels the other day. Trans was top of the F and primary primary a tad high being just above the bottom of the clutch plates.Went for a 200 mile ride today. When I parked it, I noticed some oil splash on cover for the rear cylinder exhaust and oil around the trans dipstick. Unscrewed it find the O ring tore when I installed it last time. My point is, if the oil is well below the surface the dipstick threads into, how does oil get up to it and pushed out through the torn o-ring and out the hole? The trans level was fine so it I didnt lose much, but I'm wondering if there isnt pressure in there, high enough to force oil up and out?

 

The gears are spinning through the oil and it tosses oil mist everywhere. If you read back to my earlier post you will see where I ran without the dipstick install and had my cloth cover move out of the way and it splashed oil all over the starter area. The dipstick has flats cut up both side when screwed in so the O-ring must seal or it will leak. That is just why HD went to the trouble to shield the pushrod area as well as they have. The idea is to keep the splashing oil mist out of the area where it is venting. There is very little pressure in the transmission and primary, that is why it has always been vented through a tiny 3/16" hose.

 

I'm at 4500mi, with 2000 since my last change, she is not using/migrating any fluids, tranny or engine. I am not used to checking tranny fluid unless I see a leak, but I will check it more often. I am running M1 20/50 in all three since my last change.

 

I tried this, but instead of oil I used Whiskey, and instead of a tube I used a straw..ended up getting too drunk to finish the test or jack the rod back and forth

 

So I quoted myself above, not because I overestimate my importance value, but to help keep the flow with this update from the last update for those that might not have read the last one.....

So, after I put the oil dye in the tranny, we took off the next day for our little trip. I checked the tranny level about a half a dozen different times throughout the weekend and no loss of oil. Rode to work and back today for a total of 550 miles since I put the dye in. Still no signs of loss. As a side note, it seems that my service tech at the dealership shorted me some oil the other day, huh? How else would you explain a 5 oz loss in the 47 mile ride home and then none for the last 550? (The service manager and I will chat about that on Wednesday when they open again.) Anyhow, I haven't pulled the derby cover to peek inside the primary until tonight. Luckily I still had a UV penlight at work so I was able to check it out properly. As you can see in the picture below, there is a thin film of dye floating on the oil. I would have felt better if there was a ****-ton of it in there or none at all, you know what I'm sayin'? This little bit makes me wonder if it's just some residual dye left over from when it was transferred during the dealers test or a small trace of my dye actually leaking thru. I really doubt they did a nice thorough flush of my primary, soooooo hell, I don't know. At this point, I'm going to just run this thing as it is and keep checking the tranny oil level and amount of dye in the primary. I mean, I guess I could flush the primary myself and start all over, but I think if there is any leakage between the two cases still there, the dye will start to accumulate more and more and I'll be able to see that eventually.

So whatever mystical magical difference there is between my old transmission and this one, I don't know, but I can say that if there is still any leaking going on, it has been DRAMATICALLY reduced. The dealership either doesn't know what it is or isn't saying, and although I had a missed call the other day on my cell, I don't think it was Willie G. calling to let me in on the little secret. So until someone somewhere figures this thing out AND comes forward with the actual problem/fix, we may never really know for sure........

I realize that my Repair Order doesn't show the Transmission Case listed on it, but I was told a few different times by the service dept that they did replace the case. The case was the first thing that arrived at the shop and at the time, they thought it was the complete setup and called to tell me that it was there and they were going to swap it out right away. That's when they realized their mistake and told me that the gear set was coming separately at a later date. It may have not been typed onto the RO, but it's there.

Bottom line......... I'll keep checkin' levels and checkin' in.......

 

I can not help it. Can you tell us what brand and wt. of whiskey you used for the test. Is it the "best"?

 

Hate to say it, but looks like I'm having a similar issues. Build date - April 2017. I started getting concerned before I even knew about this thread. The day of my purchase, with only around 30 miles on the odometer, I checked engine and transmission oil and everthing was perfect. Checked everything again at around 500 miles and engine oil was still ok, but the transmision oil was now at the halfway mark. At the time of my 1k service, the level was just a hair above the add mark. Let the dealer know, of course they never heard of the issue, but they did document the transmission oil was low. They drained and refilled all fluids and again the transmission was exactly at the full mark, but now at 1700 miles its jus over halfway down the stick again. On a side note, I babied this bike the first 500 miles. Never went north of 3000 rpm til after 500 miles and never north of 3500 til after 1k. Now, I ride a little it a little more 'normal' and 4k rpm is a more frequent occurance. There's great information in this thread. Thanks to everyone who has contributed. I'll post any updates.

 

checked mine yesterday and it was low, off the stick low? My 103 was like yours, check it and forget it so I was surprised that is as low on the M8 after 1400 miles. My oil was also 1 QT low at 1400 miles.