Author Topic: M8 Softails  (Read 1521 times)

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Offline Grayrider

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M8 Softails
« on: February 02, 2018, 02:57:43 PM »
For the guys who are riding M8 Softails. Are they having the same issues of oil migration, sumping  or others the Touring models are having?
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Offline Rooster15

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Re: M8 Softails
« Reply #1 on: February 03, 2018, 07:53:29 PM »
I have a 18 Fatboy-s, with the 114 M-8. I am constantly having to check the trans fluid. With 1500 miles, have had to add 12 oz. to bring it up to the full mark. Really disappointed. :angry:

Offline FSG

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Re: M8 Softails
« Reply #2 on: February 03, 2018, 08:30:09 PM »
a Fatboy-S, does it have a Hyd or a Cable operated clutch ?

Offline Ohio HD

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Re: M8 Softails
« Reply #3 on: February 03, 2018, 08:36:01 PM »
Parts book shows cable clutch.
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Offline Hossamania

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Re: M8 Softails
« Reply #4 on: February 03, 2018, 08:39:38 PM »
I have a 18 Fatboy-s, with the 114 M-8. I am constantly having to check the trans fluid. With 1500 miles, have had to add 12 oz. to bring it up to the full mark. Really disappointed. :angry:

If it is transferring, that means your primary is 12 oz. too full as well.
Is tranny fluid checked with the bike straight up, or on the sidestand?
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Offline lickidysplit

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Re: M8 Softails
« Reply #5 on: February 03, 2018, 09:54:35 PM »
wow, that is near an ounce every 100 miles! And it is going straight into the primary? That is totally unacceptable, I'd be taking that back to the dealer for sure. I know on my twincam bikes I cant hardly get it in nuetral  if the primary is overfilled but I don't know about the M8. Sure hope they get this sorted out soon or I will not be going there.

Offline Grayrider

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Re: M8 Softails
« Reply #6 on: February 04, 2018, 07:06:52 AM »
I had read that is was mostly the Hyd clutch touring with the transfer problem.
Seems to be a hit and miss on the M8 bikes.
Luck or ?.  And so far no definite fix.
Very dissappointing for an interested buyer and even more so for an owner!
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Offline v guy

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Re: M8 Softails
« Reply #7 on: February 07, 2018, 08:29:10 AM »
I just passed on an '18 Heritage, due to the unresolved problems. I will wait another year. Even had a 1.75% loan lined up.

Online 1FSTRK

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Re: M8 Softails
« Reply #8 on: February 07, 2018, 04:48:55 PM »
I have a 18 Fatboy-s, with the 114 M-8. I am constantly having to check the trans fluid. With 1500 miles, have had to add 12 oz. to bring it up to the full mark. Really disappointed. :angry:


The most common problem with the M8 is BS from people without one.
Like this post and so many others.
Haters gonna hate right.


Yet you quote an unhappy owner with a legitimate defect.
I like your logic, don't let facts get in there and sidetrack your agenda. :wink:


Seriously , the 18 Softails have a clutch cable.
I rest my case.
It's funny that you mention agenda.


All the propaganda on the Softail-S says Hydraulic clutch.
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Offline twincamzz

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Re: M8 Softails
« Reply #9 on: February 09, 2018, 12:56:54 PM »
Noticed several nasty comments posted. I have the 18 Fatboy, and yes, it does lose oil from the tranny. Have a 17 Streetglide, but it is a fine, strong running bike. No agenda", just looking for an answer that no one has an answer to. Manual (cable) clutch on the softtail. U know the answer??.

I've been watching this thread since day one. Sorry to hear that you are having the transmission fluid to primary transfer problem on your new Fatboy. I own a 2017 Limited and also have the transfer issue. Everything I've read points to the hydraulic clutch actuator area, however this cannot be the case of your Fatboy since you say it has cable operated clutch.
These machines cost way to much IMHO to be having problems such as these.

Offline FSG

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Re: M8 Softails
« Reply #10 on: February 10, 2018, 02:29:58 PM »
I'm having a real hard time envisioning how an M8 Softail with a Cable Clutch can possibly transfer trannie oil to the primary, on the other hand if it had a Hydraulic Clutch then even Blind Freddie could envision it, although I'm sure he'd prefer to see it.

Offline Oz Dan

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Re: M8 Softails
« Reply #11 on: February 14, 2018, 01:26:55 PM »
Iíve read about this issue ad nauseum. I have a 2017 Road King (hydraulic clutch) which does not transfer at all. Itís been dyno tuned twice and has covered 20,000km without issue. So firstly, they donít all do it, and secondly, Iím not sure I buy the hydraulic clutch as the definitive mechanism based on my experience and reading reports such as Rooster has put here in this thread.

I pass on my experience purely as another data point in this riddle.
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