2018 M8----Sumping? Failures?
Member
Joined: Jul 2009
Posts: 4,310
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I would say that either path could work out fine. You have finally after four attempts gotten a stage four motor that seems to be working as it should. There are quite a few full aftermarket builds out on the street that are doing well also. I would feel better about doing one now that S&S has released there oil pump/cam plate for the M8. I know that Steve Cole has built a 120 ci. for a customer that was a HD stage 4 and had failed 3-4 times. The last time the guy took it back to the dealer they took pictures of the bike as the MOCO required with a set of aftermarket pipes that they had installed still on the bike. The MOCO voided the warranty. As far as I know the build that Steve did is still functioning correctly without sumping and still running the stock oil pump. Steve had quite a few ideas on how to stop the sumping and think several were incorporated into the build. So either way can work. If you're trying to keep your warranty alive on a dealer stage build I would be very careful about what is used and how it is tuned, not every dealer is savvy or even cares about what it takes to keep the warranty valid.
That S&S Build will void your drivetrain warranty. No transmission warranty coverage. No primary warranty coverage. Nothing in the drivetrain will be covered once you go to 3rd party parts. So long as everyone fully understands that going into their engine upgrades.... its all good.
Last edited by Heatwave; Jul 8, 2018 at 03:25 PM.
Club Member
Joined: Jul 2014
Posts: 11,469
Likes: 3,572
From: Idaho
On the day that the Harley-Davidson Motor Company's senior executives and the US EPA executed the "consent decree", do you know what was sitting in the stock rooms of every HD dealership in the US? Cases of the new Screamin' Eagle catalogs, showing all of the brand new "EPA compliant" parts, including the new "EPA compliant" Screamin' Eagle Pro Street Tuner. The MoCo had been working on this with the EPA for years.
The EPA fines and the consent decree are the best things that have happened to the MoCo in decades. Because, as Heatwave has said above, now it's in your best interest to have the work done on your bike at the dealership, using HD parts.
Because if you don't, the MoCo can, and is, taking every opportunity to void your warranty and refuse to fix your bike.
I swear, I'll bet the MoCo helped dictate the terms of the EPA Consent Decree.
Outstanding HDF Member
Joined: Oct 2009
Posts: 2,791
Likes: 690
From: Smalltown,USA
This^^^ is enormously important. And here's why:
On the day that the Harley-Davidson Motor Company's senior executives and the US EPA executed the "consent decree", do you know what was sitting in the stock rooms of every HD dealership in the US? Cases of the new Screamin' Eagle catalogs, showing all of the brand new "EPA compliant" parts, including the new "EPA compliant" Screamin' Eagle Pro Street Tuner. The MoCo had been working on this with the EPA for years.
The EPA fines and the consent decree are the best things that have happened to the MoCo in decades. Because, as Heatwave has said above, now it's in your best interest to have the work done on your bike at the dealership, using HD parts.
Because if you don't, the MoCo can, and is, taking every opportunity to void your warranty and refuse to fix your bike.
I swear, I'll bet the MoCo helped dictate the terms of the EPA Consent Decree.
On the day that the Harley-Davidson Motor Company's senior executives and the US EPA executed the "consent decree", do you know what was sitting in the stock rooms of every HD dealership in the US? Cases of the new Screamin' Eagle catalogs, showing all of the brand new "EPA compliant" parts, including the new "EPA compliant" Screamin' Eagle Pro Street Tuner. The MoCo had been working on this with the EPA for years.
The EPA fines and the consent decree are the best things that have happened to the MoCo in decades. Because, as Heatwave has said above, now it's in your best interest to have the work done on your bike at the dealership, using HD parts.
Because if you don't, the MoCo can, and is, taking every opportunity to void your warranty and refuse to fix your bike.
I swear, I'll bet the MoCo helped dictate the terms of the EPA Consent Decree.
Tourer
Joined: Jul 2017
Posts: 259
Likes: 85
From: Tennessee
Confused
I can see perhaps putting a torque cam in a 107 but then again they have plenty of umph from the factory. I can quite figured out why I would ever do a stage 4 kit after having an 88 and a 103. The M8 has tons of power as is.
If if I wanted to go fast I would have kept my ZX14. I bought my Harley for cruising and its low and mid-range power.
If if I wanted to go fast I would have kept my ZX14. I bought my Harley for cruising and its low and mid-range power.
Member
Joined: Jul 2009
Posts: 4,310
Likes: 1,079
I can see perhaps putting a torque cam in a 107 but then again they have plenty of umph from the factory. I can quite figured out why I would ever do a stage 4 kit after having an 88 and a 103. The M8 has tons of power as is.
If if I wanted to go fast I would have kept my ZX14. I bought my Harley for cruising and its low and mid-range power.
If if I wanted to go fast I would have kept my ZX14. I bought my Harley for cruising and its low and mid-range power.
Tourer
Joined: Jul 2017
Posts: 259
Likes: 85
From: Tennessee
I get it
I understand the extra power but my point is that I bought an 850lb cruiser that has plenty of low end grunt as is compared to the Harleys Ive owned in the past. Im not downing anyone for wanting to upgrade. Its all good.
Stellar HDF Member
Joined: Apr 2007
Posts: 2,339
Likes: 486
From: Nor Cal
I can see perhaps putting a torque cam in a 107 but then again they have plenty of umph from the factory. I can quite figured out why I would ever do a stage 4 kit after having an 88 and a 103. The M8 has tons of power as is.
If if I wanted to go fast I would have kept my ZX14. I bought my Harley for cruising and its low and mid-range power.
If if I wanted to go fast I would have kept my ZX14. I bought my Harley for cruising and its low and mid-range power.
Road Warrior
Joined: Sep 2016
Posts: 1,887
Likes: 1,059
From: SE Washington
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Advanced
Joined: Jul 2018
Posts: 64
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From: Sacramento
loses power after 50-100 miles.the top end gets way too hot and makes a lot of noise. Told today it was a sumping issue.
This sumping issue was supposed to be fixed. I guess not.
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Joined: Jul 2009
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