Gas mileage on buildups
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Gas mileage on buildups
Hey guys just wondering for you's that have non stock engines, even mild non stock, what kind of gas mileage you's are getting and around what speeds your riding to document your findings?
On my build which is not a typical top end and cam buildup I'm getting about 38 mpg.
These are my specifics for my 1999 flht Classic without the tour pack on.
White Brothers Eseries exhaust
CV51 mm carb
SE spring and AIM variable pressure plate.
Gear drive. HQ 575 cams.
Fueling oil pump.
se crank 4-3/8 stroke crank
6 speed Baker transmission
HQ-6100 ignition
10.5:1 compression ratio
140tq 122 hp give or take
On my build which is not a typical top end and cam buildup I'm getting about 38 mpg.
These are my specifics for my 1999 flht Classic without the tour pack on.
White Brothers Eseries exhaust
CV51 mm carb
SE spring and AIM variable pressure plate.
Gear drive. HQ 575 cams.
Fueling oil pump.
se crank 4-3/8 stroke crank
6 speed Baker transmission
HQ-6100 ignition
10.5:1 compression ratio
140tq 122 hp give or take
Last edited by RidemyEVO; Jul 17, 2015 at 03:38 PM.
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,548
Likes: 7,204
From: Oxford, Nc
Stage II 95" from the factory and I regularly go 46 mpg commuting down 55 mph country roads. Now that my new job takes me down I 85 for 13 miles each way at 75 to 80 mph, the gas mileage is down to 42 mpg, less when the temp hits 95 degrees. I don't think the build is as important as how and where you ride it.
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
I should have stated when I checked gas mileage I was doing an average of 70mph steady.I used some new ngk plugs for plug chop and put the old plugs back in but plan to now give the bike new plugs , maybe that will improve the mileage. Gets costly when I ride with my wife and I have to fill hers up as well.
Interesting numbers you guys are putting up though. As was said perhaps it's not the build so much as the speed the bike is pushing.
I might add with the baker 6/speed I'm averaging 2500rpm at that speed and when I checked the other time with my bike and my wife's 2002 dyna 120 engine I didn't get any worse trying to keep up with her decision to be throttle happy.
Interesting numbers you guys are putting up though. As was said perhaps it's not the build so much as the speed the bike is pushing.
I might add with the baker 6/speed I'm averaging 2500rpm at that speed and when I checked the other time with my bike and my wife's 2002 dyna 120 engine I didn't get any worse trying to keep up with her decision to be throttle happy.
Last edited by RidemyEVO; Jul 17, 2015 at 09:57 PM.
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Seasoned HDF Member
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From: Carlsbad, CA
I get about 30 MPG, cruising at about 70. But, I'm loving the ride and don't care about MPG. If you care about MPG get a Prius!
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Thread Starter
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Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
Love the ride no doubt but at the same time want to get all I can out of it for gas mileage and know that I did all that could be done.
Tourer
Joined: Jul 2007
Posts: 497
Likes: 8
From: New Egypt, NJ
And when you're riding in places where towns are hundreds of miles apart, it's nice to know you can go 200 miles on a 5 gallon tank if you have to.