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M8 Sumping - Warning signs to listen for?

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  #31  
Old 05-27-2018, 06:35 AM
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If I had a tuner tht could limit RPM, I would do it. Maybe I would tell the dealer to do it. Though, there may come a time in an emergency you want the power and don't have to shift. But if I didn't have a tach, maybe I would tell them to change the limiter.

On TCs, I left mine around 5500 or 5700. So far out of power band by the then, no point.
 
  #32  
Old 04-13-2019, 06:03 PM
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Although I would not ride at 4500 rpm sustained, o find it hard to understand that it should be bad to run the bike up to higher revs briefly. Stage 3 useful HP and torque is 4500 to 5500 RPM?
 
  #33  
Old 04-13-2019, 06:43 PM
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Just curious about something' what is the redline on the TC's? Did the OP build up his engines to live in the redline area?
 
  #34  
Old 04-13-2019, 06:45 PM
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I’ve noticed this sump issue is common with M8’s
 
  #35  
Old 04-13-2019, 07:03 PM
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Originally Posted by seniorsuperglideE8
Just curious about something' what is the redline on the TC's? Did the OP build up his engines to live in the redline area?
Believe it is 5,500 rpm's, after stage 1 6,200 rpm's.
 
  #36  
Old 04-13-2019, 09:57 PM
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Originally Posted by seniorsuperglidee8
just curious about something' what is the redline on the tc's? Did the op build up his engines to live in the redline area?
Originally Posted by bricklayer
believe it is 5,500 rpm's, after stage 1 6,200 rpm's.
5800.
 
  #37  
Old 04-13-2019, 10:23 PM
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This is BS
They haven't resolved this issue yet.
I'm keeping my 2004 RoadKing with it's Twin Cam.
I bought a newer bike this winter, and kept my old RoadKing.
I could have sold my bikes and bought a new FLH, but I dont trust Harley will do the right thing on the M8, after sticking me with the cam chain follower upgrade. It should have been a recall.
Wonder why Harley is having problems?
Maybe it's because instead if buying a new Harley, I kept my old Harley and bought a 2010 GoldWing.
 
  #38  
Old 04-13-2019, 10:43 PM
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Originally Posted by nytryder
My guess would be in the 100+ mph. My bike a Twin Cam rarely sees 4500 rpn in any gear and never in a sustained situation. Doing so would likely result in a shorter overall engine life but not a total destruction of the engine. HD has has stated not to run the M8 over 3500 RPM which seems to me an ad admission of faulty engineering. Just my thoughts.
. I run my tc at 4500 in each gear every day. My commuter 40k still going strong. And I rarely hit 6 gear. Gotta be going 90 mph to hit 6th. I cruse around 3500 rpm at 80 mph. Was told long time ago dont lug your harley.
 
  #39  
Old 04-14-2019, 06:34 AM
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Originally Posted by Zerk
Ya I found that odd For 500 miles, vary the RPMs and don't go over 60mph much, I believe is the break in.
not even that conservative. for the first 50 miles, don't exceed 3000 rpm. for the next 450, don't exceed 3500.
 
  #40  
Old 04-14-2019, 08:03 AM
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Originally Posted by Mark Moore
If I'm a fool for running my $50,000 top of the line Harley Davidson at 4500 RPM then I guess I'm a fool! I am definarely a fool for spending so much money on a new Harley thinking it was built to ride hard. Maybe I'll trade this boat anchor in for a Honda.
Mark you are fine, just like your Harley tech told you, it’s not your fault. Try to ignore chicken-heads clacking about about what rpm is appropriate for you to ride at. They are ignorant of the cause that created a failure and want to offer up superstitious solutions.
Hope you get your ride back soon and it’s fixed for good. Please let us know how it turns out, maybe a 1000 mile follow up?
 
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