Milwaukee Eight (M8) 2017 and up M8 Air and Liquid Cooled discussion
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Old Jan 23, 2019 | 04:29 AM
  #1  
Scorched Orange SGS's Avatar
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Default Looking for a number!

I'm thinking about a stage 4 kit on my 2019 Milwaukee Eight 114 SGS, I already expect a fuel milage drop by doing this upgrade but I'm wondering if anyone knows how much of a decrease, I know this will depend on riding styles as well, just looking for a rough number.
 
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Old Jan 23, 2019 | 05:13 AM
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Not sure on the stage 4 but I did the stage 5 tire shredder on my ‘12 FLHTK and with a good tune I averaged around 38 mpg when riding mostly interstate at the speed limit plus 5-7. You are correct about rieing style, but also a good tune is key. FYI, I see you are in SC. The dealership in Raleigh NC is offering 15% off parts and labor on all Harley stage kits. Might be something to look into or use as a bargaining tool at your dealer.
 
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Old Jan 23, 2019 | 06:48 AM
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I lost 4mpg with stage III
 
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Old Jan 23, 2019 | 10:25 AM
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Curious, so is there a threshold beyond which you'd cancel the build?
 
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Old Jan 23, 2019 | 11:24 AM
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4mpg lose isn't bad, as to a threshold before I wouldn't do it, maybe like 8 to 10 total. I want to do the build, just learning my way around around the M8 engine and how it reacts.
 
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