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post #1 of 36 (permalink) Old 08-18-2012, 04:03 PM Thread Starter
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gas mileage question

After all of my work and looking for a new bike notwithstanding, i'm wondering about gas mileage
I am aware of the addage of 'increase performance = decrease gas mileage"
After adding the cruzers and rejet to 142 and the stock KN air filters. I had my first long ride since the rejet today and on the highway crusing at 75-80 mph and 5500 rpms, i noticed the mileage was horrible. Down around 28/gal. I had to fill up at 80 miles. On the ride back, it was all back roads, 55-60 mph and 4500-5000 rpm and the mileage was much better. I filled up at 95 miles, but thats because nothing else was near. I could have gone another 25-30 miles.

is this difference normal, or could I have an issue thats causing poor highway mpg

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2003 VN1600.. new ride
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post #2 of 36 (permalink) Old 08-18-2012, 04:45 PM
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post #3 of 36 (permalink) Old 08-18-2012, 05:11 PM Thread Starter
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so higher revs and cruising speed sucks down that much more gas?? geez

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post #4 of 36 (permalink) Old 08-18-2012, 05:13 PM
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28 mpg is pretty low in my opinion when we only carry 3.2 gallons total. For me the increase in power is not justified in an overal evaluation because I have not heard anyone state any real super power gains with those same modifications. So far with the riding I do there has never been a situation where I felt I needed more power either for speed or just to get up a hill. Unless my riding makes some dramatic changes I guess I will leave my motor in the stock configuration. JMHO.

and always remember, "Ride until you rot!"
**Really not sure if the Big "C" is back right now
but having to face the fact that this is a lifetime routine
going forward. Five operations done and it still continues.

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New ride: 2009 Victory Vision Arlen Ness Signature Series
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post #5 of 36 (permalink) Old 08-18-2012, 05:37 PM
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Originally Posted by Vulcan2000 View Post
28 mpg is pretty low in my opinion when we only carry 3.2 gallons total. For me the increase in power is not justified in an overal evaluation because I have not heard anyone state any real super power gains with those same modifications. So far with the riding I do there has never been a situation where I felt I needed more power either for speed or just to get up a hill. Unless my riding makes some dramatic changes I guess I will leave my motor in the stock configuration. JMHO.
I agree.... everyone wants "more power"... And heck, I would like some to... but I don't "need" it. I like high gas millage and filling up less frequently.

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post #6 of 36 (permalink) Old 08-18-2012, 05:44 PM
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I ride my bike to work just about every day, 27 miles or so each way, depending on the route I take. Most times I take US1 which is mostly highway until I get into town. And I usually run at about 70-75mph (which is right about 4800-5000 rpm). Mix that in with some 45-55mph riding around work. I get between 48-52 mpg regularly. Now that is all stock exhaust, air filters, etc.

I'd have a hard time justifying additional power at a cost of nearly half my mpg.
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post #7 of 36 (permalink) Old 08-18-2012, 06:04 PM
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I just took my summer trip, 2300 miles and my mpg was around 48-52 running at 65 to 70 mph, got 60 mpg on a tank running with Denny at 55 mph, and one day I got 70.3 mpg when doing the hills around the Dragon at 30-45 mph, but there was a bunch miles of downhill with the clutch in too. But then again my setup is stock and I don't take off like a B.o.o.H. either.

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post #8 of 36 (permalink) Old 08-18-2012, 06:41 PM
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Kinda normal. 28 sounds low however.

I use to joke that if you ride going at any speed that goes over 5000 rpms you could actually watch the fuel gauge move down. Not really that much of a joke as fuel consumption goes way up there.

If you consciously try to milk it by watching your revs and not being hard on the throttle you can get some impressive mpg figures.

Doing an earshave, rejetting with BIGGER jets, yeah, mpgs will suffer. You can't have your cake and eat it too as they say.

If getting good gas mileage is your main concern, leave the bike stock and ride it like an old man......

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post #9 of 36 (permalink) Old 08-18-2012, 09:19 PM
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I did a ride a couple of weeks ago in Mankato. It was a short 130 mile run but we did fill up at around 100 miles. I got 48.8 miles to the gallon and it is stock.I filled before I left to go home and then checked at the next fill. Same mileage. I'll take the nearly 50 miles to the gallon anyday. Even on my intown driving I still get around the same. The stock bike has plenty of power on it's own. If you want more, get a bigger bike. JMO

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post #10 of 36 (permalink) Old 08-19-2012, 07:20 AM
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I got it down to 38 mpg once, but I was maxing out when shifting and 75 mph+ on the highway, right now I average 48.

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