Milwaukee Eight (M8) 2017 and up M8 Air and Liquid Cooled discussion
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Checked the crank position sensor today......

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  #11  
Old 04-25-2021 | 05:00 PM
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Originally Posted by Quik
Welll, noticed my oil fluctuating a little on my dipstick in my 128 so I pulled the CPS and dropped about 11 ounces out, I really hated to see this! No signs of sumping or anything just the oil level moving some. This 128 build was done in December and during break in with Kendal conventional oil that FM put in there was no change on the dipstick for 1k miles. After break in I put Redline full synthetic oil in and noticed with in a few hundred miles some movement on the stick. I was told after my bike sumped bad when it was stage 2 to not run synthetic in it again and I didn’t until after the 128 build which I figured was good at that point. We put the newest HD 8 lobe pump in when they did the 128 also. Long story short, I’m going back to conventional oil and see how that plays out. I change my oil at 3k so conventional should be fine. I’m running Bel ray conventional primary oil in the primary now at the recommendation of FM so I’m just gonna go with bel ray mineral in the engine and belray 85/140 tranny oil. Bike is still running great, was just a little disappointed to see 11 ounces in the crank. Hopefully the mineral oil takes care of it, we’ll see.
Was this going on before the Trask cover install?
 
  #12  
Old 04-25-2021 | 05:04 PM
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Originally Posted by OldMike
Was this going on before the Trask cover install?
yes sir, oil starting changing on the dipstick after I dropped the conventional break in oil out.
 
  #13  
Old 04-25-2021 | 05:08 PM
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Originally Posted by Quik
yes sir, oil starting changing on the dipstick after I dropped the conventional break in oil out.
I know different types of bikes but my 2019 Low Rider, I was chasing fluctuating oil level and wrote it off to the old style oil pump since my 2020 is fine.
Maybe a seal but if FM is calling it good just keep checking.
 
  #14  
Old 04-25-2021 | 05:28 PM
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Originally Posted by OldMike
I know different types of bikes but my 2019 Low Rider, I was chasing fluctuating oil level and wrote it off to the old style oil pump since my 2020 is fine.
Maybe a seal but if FM is calling it good just keep checking.
Yeah I thought the new HD 8 lobe was the trick, and maybe it is, I may just be overthinking it. The guy at FM said he sees and average of 8-10 ounces in there when he does builds so I’m gonna keep on rollin. Revzilla is dropping all my new fluids off tomorrow so I will change it and keep a close eye on it.
 
  #15  
Old 04-25-2021 | 11:27 PM
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Originally Posted by 702
Ugh. I wonder if we'll ever know why some do this and most don't.
In the part two video he said this bike sumped because of a piston oiler jet.
 
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  #16  
Old 04-26-2021 | 07:44 AM
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Just a question or two... During break in I am sure you were extremely cautious of how you rode the bike and did the break in, so could that in itself be why the oil did not fluctuate? During the engine build, are you certain that the oil pump was set properly rotating the engine after pump installed but prior to torque and allowing it to align properly? Just asking, sometimes even the most experienced can miss a step. Pump not set right can cause it to cavitate
 
  #17  
Old 04-26-2021 | 07:55 AM
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Originally Posted by GlidingJoe
Just a question or two... During break in I am sure you were extremely cautious of how you rode the bike and did the break in, so could that in itself be why the oil did not fluctuate? During the engine build, are you certain that the oil pump was set properly rotating the engine after pump installed but prior to torque and allowing it to align properly? Just asking, sometimes even the most experienced can miss a step. Pump not set right can cause it to cavitate
Fuel Moto built the engine so I feel confident it was done right. As far as break in, Jamie said most of that was done on the dyno so to ride it as normal, only thing they said not to do was go wot for extended periods, otherwise ride as usual.
 
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  #18  
Old 04-26-2021 | 08:01 AM
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Originally Posted by Hairy Larry
In the part two video he said this bike sumped because of a piston oiler jet.
That is a cause of a fair number of them with the issue. Not always the oil pump . Sometimes both.
 
  #19  
Old 04-26-2021 | 08:03 AM
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Originally Posted by smitty901
That is a cause of a fair number of them with the issue. Not always the oil pump . Sometimes both.
the jets were checked and good on mine during the build but they still checked and re torqued
 
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  #20  
Old 04-26-2021 | 08:20 AM
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Originally Posted by Quik
the jets were checked and good on mine during the build but they still checked and re torqued
I know if FM did the work it was done right with out question. I had an early build 2017 that was according to some 100% going to sump. I checked it from time to time and laid the bike to rest at 40,000 miles. It never sumpped or had any of the transfer issues.
Truly strange why some do and some don't.
 



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