M8 trans oil migration
Ultimate HDF Member
Joined: Jul 2014
Posts: 5,649
Likes: 430
From: MASS_hole
I ride a twinky
And yeah, I guess the new ones don't require it due to hydraulics
And yeah, I guess the new ones don't require it due to hydraulics
Last edited by splattttttt; Sep 5, 2017 at 07:45 AM.
Ultimate HDF Member
Joined: Jul 2014
Posts: 5,649
Likes: 430
From: MASS_hole
probably pressure driven. And the tranny might build more of it
Tourer
Joined: Apr 2015
Posts: 336
Likes: 26
From: Colorado
That said I have a 2017 114 M8 with a born on date of Jan 2017, purchased on June 30th, have put 5500 miles on it and no fluid transfer that I see. 1700 of those miles were a road trip averaging 75 miles per hour at about 3200 rpm. So either I do not have the issue or it really does have to do with higher rpm's for a sustained amount of time. I have never seen the transmission level drop. In full disclosure I have not pulled the primary cover and I have gotten service at 1000, 2500, and 5000 on a VIP plan. My plan is to pull the cover before I take it in for the 7500. Will also setup a video camera just it case it is full to flowing over I can show the dealer.
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,158
Likes: 11,249
From: San Diego, CA
I believe the overflow only happens to people who check their trans oil, it doesn't read on the stick, and they add 10oz+ to the trans....
Most people are transferring smaller amounts. They catch it by putting dye in the trans oil and then finding it in the primary, or they keep track of how many ounces they add to their trans between services and then measure what's removed from the primary. They then find the primary has more than they put in at last service, in an amount that is close to what they added to the trans...
Tourer
Joined: Apr 2015
Posts: 336
Likes: 26
From: Colorado
If you are not noticing the trans fluid level is low, and adding fluid to your trans, you won't overflow your primary...
I believe the overflow only happens to people who check their trans oil, it doesn't read on the stick, and they add 10oz+ to the trans....
Most people are transferring smaller amounts. They catch it by putting dye in the trans oil and then finding it in the primary, or they keep track of how many ounces they add to their trans between services and then measure what's removed from the primary. They then find the primary has more than they put in at last service, in an amount that is close to what they added to the trans...
I believe the overflow only happens to people who check their trans oil, it doesn't read on the stick, and they add 10oz+ to the trans....
Most people are transferring smaller amounts. They catch it by putting dye in the trans oil and then finding it in the primary, or they keep track of how many ounces they add to their trans between services and then measure what's removed from the primary. They then find the primary has more than they put in at last service, in an amount that is close to what they added to the trans...
Ultimate HDF Member
Joined: Jul 2014
Posts: 5,649
Likes: 430
From: MASS_hole
do you tipically keep your revs below 4k and hen riding?
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Tourer
Joined: Apr 2015
Posts: 336
Likes: 26
From: Colorado
I do when just shifting in a normal relaxed condition. There are times of course where I down shift to pass or shift later to use the power longer. But from what I have read over the past view months it takes a 5 minute sustained >3500 to really test it which is not my riding profile. And I have never had a Dyno done on it.
Road Warrior
Joined: Mar 2012
Posts: 1,514
Likes: 88
From: USA
I have a 2018 fat bob and have an update to this.
I have about 500 miles on the bike so far. After coming across this thread i decided to check my primary. The fluid was a bit low. Ok so now fluid coming over from the transmission right? Good...
So I check the transmission while I'm at it.. and it was LOW. It didn't go into the primary (that I know of) because I think there would be more in there, unless it was just low to start.
I check the engine oil, and it was too much, above the full/hot mark. When I took the bike home first day I check the oil level and it wasn't that high.
This was all done while the bike was cold.
So question is, can transmission fluid even get into the engine? Or was the primary and transmission fluid low due to not being properly filled at time of delivery? (I thought they come filled no?).
Guys let me know your thoughts...I'm going to keep an eye on it though and post back.
I have about 500 miles on the bike so far. After coming across this thread i decided to check my primary. The fluid was a bit low. Ok so now fluid coming over from the transmission right? Good...
So I check the transmission while I'm at it.. and it was LOW. It didn't go into the primary (that I know of) because I think there would be more in there, unless it was just low to start.
I check the engine oil, and it was too much, above the full/hot mark. When I took the bike home first day I check the oil level and it wasn't that high.
This was all done while the bike was cold.
So question is, can transmission fluid even get into the engine? Or was the primary and transmission fluid low due to not being properly filled at time of delivery? (I thought they come filled no?).
Guys let me know your thoughts...I'm going to keep an eye on it though and post back.
Last edited by izzyryder; Sep 5, 2017 at 10:33 AM.