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Improving mileage on my fxdbi

Old Oct 3, 2017 | 08:08 PM
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Default Improving mileage on my fxdbi

I just got done putting the first 1000 of my own miles on my 06 streetbob and I feel the mileage is awful. After looking it seems most people get around the same as I do Which is 31-35 most of the time, some times on the highway I have seen 39 but that was only once. Is there any thing I can do to improve mileage my dad gets high 40s almost 50 on his 07 night train 96” with a custom pipe big sucker intake and thundermax. My bike still has the 88 but I have a thunder header screaming eagle stage 1 intake and power commander 5 using the dynojet map. I am planning on doing Andrews 21 cams this winter while I do some other cam related things. Is there any one with input that could help or am I just stuck with this Milage
 
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Old Oct 3, 2017 | 08:58 PM
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On my 07, which is a 96, I have the same tuner as your Dad, with high flow intake and exhaust. I get around 36 on a regular basis. I do almost no highway riding and for the most part I run it pretty hard. I didn't put the stage 1 on it so I could loaf around, and frankly, I'm so happy with the way it runs I don't pay much attention to mpg.
Could be that the two of you just have different riding styles.
 
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Old Oct 3, 2017 | 09:18 PM
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Your 88 is lower geared than your dad's. My brothers 88 W/cams always gets 6-8 mpg less than I do.
 
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Old Oct 3, 2017 | 09:57 PM
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Originally Posted by Bluegoose95401
... screaming eagle stage 1 intake and power commander 5 using the dynojet map...
It's a pretty easy guess that the PowerCommander is richening the mixture and not leaning it out. So about the only thing to suggest is a good dyno tune to see if you can lean things out.
 
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Old Oct 3, 2017 | 11:38 PM
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Originally Posted by Nitro 54
Your 88 is lower geared than your dad's. My brothers 88 W/cams always gets 6-8 mpg less than I do.

what bike is your brothers, what cams did he do any other work done to it? If I dropped 6-8 miles per gallon I would be in the 20s. That would really suck
 
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Old Oct 4, 2017 | 12:31 AM
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Originally Posted by Russ69
It's a pretty easy guess that the PowerCommander is richening the mixture and not leaning it out. So about the only thing to suggest is a good dyno tune to see if you can lean things out.

auto tune kit is on my toget soon list
 
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Old Oct 4, 2017 | 11:12 PM
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His has S&S 510 cams, its a 04 Electra Glide. Fully loaded he has been in the upper 20's for fuel mileage when I'm in the 38-40 range. Normally he get's around 38, while I average 46.
 
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Old Oct 4, 2017 | 11:30 PM
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Tire pressures at 36 front/41 rear.
Check for a sticking brake piston.
Get your bike tuned via dyno.
Don't ride "WFO" all the time.
Burnouts/wheelies/launches kill fuel mileage (amongst other things.)
Remember: Harley are for cruising or touring. Riders just look silly if they try to go fast on them.
 
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Old Oct 5, 2017 | 03:12 AM
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Originally Posted by Bluegoose95401
. Is there any one with input that could help or am I just stuck with this Milage
1. Ride like your Dad; smooth without hammer down each time you take off.

2. Stop with the power mods, the cost of faster, louder, more hp, more tq, is mpg's.
 
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Old Oct 5, 2017 | 06:05 AM
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Originally Posted by NORTY FLATZ
Tire pressures at 36 front/41 rear.
Check for a sticking brake piston.
Get your bike tuned via dyno.
Don't ride "WFO" all the time.
Burnouts/wheelies/launches kill fuel mileage (amongst other things.)
Remember: Harley are for cruising or touring. Riders just look silly if they try to go fast on them.
Originally Posted by LoneWoolf
1. Ride like your Dad; smooth without hammer down each time you take off.

2. Stop with the power mods, the cost of faster, louder, more hp, more tq, is mpg's.

i accelarate like a grand pa and usually just hang in 6th gear
 
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