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Spark plugs loose? Yes

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  #21  
Old 01-07-2020, 09:27 AM
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Better way than all that purging is to just let the bike sit for a few hours. If I'm going to pull my tank for routine work, I will make sure the tank is near empty and let it sit overnight. Commence work the next morning when it is all cooled down and there is no pressure left in the fuel line.
 
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  #22  
Old 01-07-2020, 02:27 PM
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Originally Posted by barneyboy
There isn't a fuel pump fuse on the M8. Fuel pump power comes from the BCM. Cut power to the BCM, and the engine can't be started to purge the fuel supply line.

Step One. Disconnect fuel pump from main wiring harness. Run the engine until it stalls. Operate the starter an additional 3 seconds after the engine stalls to remove remaining fuel from fuel supply line.
That's because of the BCM?
 
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  #23  
Old 01-07-2020, 03:19 PM
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FWIW:



PAGE 2
 
Last edited by BrandonSmith; 01-07-2020 at 03:22 PM.
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  #24  
Old 01-07-2020, 11:11 PM
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Originally Posted by KrustyKush
Better way than all that purging is to just let the bike sit for a few hours. If I'm going to pull my tank for routine work, I will make sure the tank is near empty and let it sit overnight. Commence work the next morning when it is all cooled down and there is no pressure left in the fuel line.
Yup ^^. I just have an old wash cloth or towel in my hand when I pull on the quick connector. Super easy, no mess. Just pulled my tank when I installed my Biketronics amp - should have brought the torque wrench out and checked the plugs while I was at it. Oh well, just takes a couple minutes and thanks to the OP for this - gonna check mine.
 
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  #25  
Old 01-08-2020, 12:37 AM
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Originally Posted by KrustyKush
Better way than all that purging is to just let the bike sit for a few hours. If I'm going to pull my tank for routine work, I will make sure the tank is near empty and let it sit overnight. Commence work the next morning when it is all cooled down and there is no pressure left in the fuel line.
Exactly what I do. No leakage, spraying, etc. Not a drop. At most the fitting might be slightly wet. Very quick and simple.
 
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  #26  
Old 01-08-2020, 07:30 AM
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After sitting overnight, there was little to no pressure in the fuel line. As stated above, just hold a towel under/around it. I would guess if pressure is present there may be the risk of unseating an oring in the connection. In my case there wasn’t even a drop of fuel that escaped.
 
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  #27  
Old 01-09-2020, 12:09 PM
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Originally Posted by voodoodrug
i've made that mistake in the past ,once it ran rough,other time blew all the way out, had to ride to safety on one plug and it was not too bad,bit surprising.
now with 4 plugs all you might notice is your getting 58 mpg?
58mpg, I'm lucky 36mpg stock engine 19limited
 
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  #28  
Old 01-09-2020, 12:15 PM
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Originally Posted by BrandonSmith
FWIW:



PAGE 2
I much prefer the pre M8 procedure...remove spark plug, install new one...ride
 
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  #29  
Old 01-09-2020, 01:49 PM
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Originally Posted by mjwebb
I much prefer the pre M8 procedure...remove spark plug, install new one...ride
I second that, but changing all 4 plugs on the m8 is fairly quick and easy as well. Only takes about 1 hr... if you're slow.
 
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  #30  
Old 01-09-2020, 10:23 PM
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Originally Posted by MTBIG G
I second that, but changing all 4 plugs on the m8 is fairly quick and easy as well. Only takes about 1 hr... if you're slow.
yeah, and the reality is they really don't need to be replaced very often..every 2 years or 30,000 miles according to maintenance schedule..no need to do them sooner if the engine's running condition / behavior has not changed..like many, I replaced them about half that many miles because it was so cheap and easy to do but not needed
 
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