MPG Semi-scientific Test - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
VN750 General Discussion

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 05-26-2018, 11:54 AM Thread Starter
Senior Member
 
Jason Pittenger's Avatar
 
Join Date: Apr 2018
Location: Northern Illinois (Not Chicago)
Posts: 231
iTrader: (0)
 
Garage
MPG Semi-scientific Test

I took a joy ride this morning, to test my mpg. I headed south for 25 miles at 60 mph with a 5 mph tailwind. I fueled up and returned the same path at 70 mph and 5 mph headwind. The path was level and had only one stop about halfway through. MPG was 55.7 at 70 mph and 73.4 at 60 mph. My recent trip at 80 mph returned 41.6 mpg.

I filled up to the same line on the tank, with the bike at the same lean angle. Mathematically, the wind effect is the same as driving 57.5 mph down and 72.5 mph back. I tried to drive similarly with speed being the only variable.

The attached trip log includes going from my house to the gas station and back, but that was not part of the mpg test.

Not bad at all for a 29 year old bike!
Attached Thumbnails
Click image for larger version

Name:	Screenshot_20180526-105246_1527349987448.jpg
Views:	30
Size:	7.8 KB
ID:	44346  


'89 Vulcan 750 Bought 4/12/18 @ 17805.9 miles $800
Purchased stock. Wrecked once
22490.0+ miles

Completed modifications:
Removed mufflers, straight pipes out of GB
110/90 Front Tire
Pick-up coil re-gapped to .020"
Compufire 55402 r/r series regulator
USB Outlet + Voltmeter
Repainted Metallic Blue w/ new tank bages
Ear Shave (wo/ coasters) 40/140 NO shims 45MPG
MCCT conversion

Planned modifications:
Custom LED turn signals
Windshield
Highway Pegs
(Possible) ignition advance
Jason Pittenger is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 05-26-2018, 01:03 PM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,444
iTrader: (5)
   
That's pretty high mpg compared to what I've seen posted. Even the 55.7 is higher.

edit: My mpg is 42-44, stock carb.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf

Last edited by Spockster; 05-26-2018 at 01:08 PM.
Spockster is offline  
post #3 of 4 (permalink) Old 05-26-2018, 03:23 PM
2000 VN 750 Senior Member
 
Join Date: Sep 2010
Location: Central New Jersey
Posts: 2,482
iTrader: (10)
   
Quote:
Originally Posted by Jason Pittenger View Post
I took a joy ride this morning, to test my mpg. I headed south for 25 miles at 60 mph with a 5 mph tailwind. I fueled up and returned the same path at 70 mph and 5 mph headwind. The path was level and had only one stop about halfway through. MPG was 55.7 at 70 mph and 73.4 at 60 mph. My recent trip at 80 mph returned 41.6 mpg.

I filled up to the same line on the tank, with the bike at the same lean angle. Mathematically, the wind effect is the same as driving 57.5 mph down and 72.5 mph back. I tried to drive similarly with speed being the only variable.

The attached trip log includes going from my house to the gas station and back, but that was not part of the mpg test.

Not bad at all for a 29 year old bike!
I agree with the previous reply that this seems high for mpg. I also do not remember anyone else ever reporting such numbers in all my years on this forum with or without modifications. I am not suggesting that the reported results are wrong but they do seem to be very difficult to accept on initial face value. I would suggest that you compare both speeds again but going in the same direction or total round trip to keep that portion of things equal. I have averaged in the low 50's mpg multiple times for a full tank of fuel while cruising in a very conserative manner. No matter what your results are I wish you safe and enjoyable riding.

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.

Tom
Vulcan 2000
New ride: 2009 Victory Vision Arlen Ness Signature Series
4507 miles
Vulcan2000 is offline  
 
post #4 of 4 (permalink) Old 05-26-2018, 06:22 PM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,570
iTrader: (4)
     
Garage
I do not think you can get a fair assessment of your average fuel mileage on a 25 mile trip. That would be a fraction of a gallon and not likely easy to measure accurately.
Not to mention traveling on a flat road at a constant speed isn't a fair comparison either, as most roads aren't flat (any many that look like they are ...are not) and wind speeds vary too.
If you want to obtain a good mpg figure you need to record several tank fulls of travel, and use a GPS to log accurate miles and speed.

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/

Last edited by Knifemaker; 05-26-2018 at 06:26 PM.
Knifemaker is online now  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome