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post #1 of 9 (permalink) Old 09-05-2009, 11:13 AM Thread Starter
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Turning and Burning

Hit my 1000 mile mark since i have owned it YEAH . My first real trip is today going down to the coast about 160 mile ride it should be fun . I have a question though , my gas mileage isn't so great i get about 70 miles to a tank before having to hit reserve I think its because of my gigantic wind screen take a look at my pic and see if you think it would harm fuel consumption,I took it off for the trip to see if it made a difference. I'm up to 41,085 and still counting

Last edited by blicky; 09-05-2009 at 11:21 AM.
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post #2 of 9 (permalink) Old 09-05-2009, 11:26 AM
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I have the Plexifairing III (just about the largest of the shields out there and kinda looks like what you have) and when I do have it on, I still get more than 70 miles before needing to hit reserve. Usually about 130 miles and I'm not really all that light on the throttle.
Are you sure the guage is reading correctly?

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post #3 of 9 (permalink) Old 09-05-2009, 11:29 AM Thread Starter
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no not a 100% sure but when its on E it shuts off lol I think its pretty close Ill double check on this trip , Carbs could also use adjustment or such Ya think ? I also run about 70 close to 80 all he way home everyday about 5-6k rpms
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post #4 of 9 (permalink) Old 09-05-2009, 12:50 PM
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I ran 80 mph with a plexifairing II and went 95 miles before I needed to go on reserve. At 55 mph I get right around 50 mpg.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #5 of 9 (permalink) Old 09-05-2009, 12:55 PM
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I get 46+ with the plexIII at 65 mpg. One thing that I have changed when refueling. I have started to fill the tank up higher into the neck tube. I figure that the 3.4 total capacity means the total volume inside the tank. And it is almost impossible to get completely filled.

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post #6 of 9 (permalink) Old 09-05-2009, 01:12 PM
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I run a PFIII too, and my mpg sucks. Mid 30's. I am heavy and tall, drive at WFO all the time on the interstate, and rarely break 75 mph. The high altitude is natures anti-supercharger. I leaned it way out and picked up some mpg at the expense of some detonation. It's back to stock jetting now. Are your air filters clean? What color on your plugs

1986 VN750A(2) 12224 miles.
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post #7 of 9 (permalink) Old 09-05-2009, 02:57 PM
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You really are getting poor fuel economy, it seems to me. The longest trip I made before my crash was about 120 miles down to Medicine Hat. I left home with a full tank, and hadn`t switched to reserve yet when we got to my daughters place. The bike is stock, no mods to intake or exhaust, and I haven`t touched the carb adjustments. The altitude here is about 3000 to 3500 feet above sea level, so I`m not as high as junkyerdroad in CO at ~5000 feet, more or less. I was riding two up, with my grandkids swapping places from the van every 30 miles or so. The bike was loaded close to the max of #400. I was riding at 65 to 70 mph, and pushing a big "tombstone" shaped windshield that is 21 inches high and 19 inches wide.

Enjoy the ride today. I hope you find a way to improve your fuel economy too.


1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
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Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


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post #8 of 9 (permalink) Old 09-05-2009, 06:16 PM
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Originally Posted by blicky View Post
close to 80 all he way home everyday about 5-6k rpms
These bikes seem to eat gas at 5K+ RPMS. Too bad it does have a sixth gear.

Chris Glennon - Portland, OR
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post #9 of 9 (permalink) Old 09-08-2009, 08:25 AM Thread Starter
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OK , So made it ok with no problems except i want my windscreen back , coastal winds beat me up and "Lovebugs"let me tell you ,I HATE THEM ,but I got 126.4 miles before not wanting to run out of gas and playing it safe and switched to reserve ,plus when i got home my petcock rebuild kit was here YES!! So needless to say I dont care my gas mileage im putting the screen back on at least till the "Lovebug" is gone Thanks all for the advise
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