Help with the math please - Kawasaki Versys Forum
 1Likes
  • 1 Post By saddlebag
 
LinkBack Thread Tools Display Modes
post #1 of 14 (permalink) Old 09-22-2015, 04:44 PM Thread Starter
Member
 
Join Date: Jul 2015
Location: London, Ontario
Posts: 22
Mentioned: 0 Post(s)
Help with the math please

Returned from a 12,000 k tour on the 2015 LT. Can someone help me understand the numbers. Kawasaki claim 5 more HP over my '08 but I cruise at 120 kph at 6000 RPM on the 15 and the '08 was at 5600 RPM. Both speedos are off by 6%. Yet the fuel mileage on the 15 is far better than the '08. Is it engine mapping? And where are the extra 5 ponies? Thanks
tonyV is offline  
Sponsored Links
Advertisement
 
post #2 of 14 (permalink) Old 09-22-2015, 08:40 PM
Member
 
kawdog's Avatar
 
Join Date: Dec 2014
Posts: 1,596
Mentioned: 0 Post(s)
>hp + >rpm = >mpg

Good observations!

Last edited by kawdog; 09-22-2015 at 09:35 PM.
kawdog is offline  
post #3 of 14 (permalink) Old 09-22-2015, 09:11 PM
Member
 
invader's Avatar
 
Join Date: Mar 2008
Location: Kapuskasing Ontario Canada
Posts: 7,827
Mentioned: 2 Post(s)
Quote:
Originally Posted by kawdog View Post
The 2015 also has an advanced ignition system, more weight, and/or possible gearing changes to accommodate the ignition system change which may account for most of that variance.
Ignition system is unchanged, although the ignition switch position has been changed to accommodate the new instrument cluster.

NEW One-piece exhaust and muffler helps to boost top-end performance.
NEW Fuel pump for improved fuel delivery.
NEW Revised ECU settings to match exhaust updates and enhance fuel economy.
NEW KAMS (Kawasaki Air Management System) radiator air ducting system.
NEW Adjustable and larger windshield provides a large still-air pocket for comfort...
invader is offline  
 
post #4 of 14 (permalink) Old 09-23-2015, 12:54 AM
Super Moderator
 
Fastoman's Avatar
 
Join Date: Sep 2009
Location: Ipoh.Perak.Malaysia
Posts: 6,745
Mentioned: 5 Post(s)
Thanks fr the up date Invader.
Fastoman is offline  
post #5 of 14 (permalink) Old 09-23-2015, 02:35 AM
Member
 
Join Date: May 2015
Location: Poland
Posts: 217
Mentioned: 0 Post(s)
Quote:
Originally Posted by tonyV View Post
I cruise at 120 kph at 6000 RPM on the 15
You sure about that? Mine does 126 kph at 6000 RPM. So 120 kph is at ~5700 RPM, right about where it apparently was on the old one.

2015 Versys 650
_Big_Mac_ is offline  
post #6 of 14 (permalink) Old 09-23-2015, 12:55 PM
Super Moderator
 
fasteddiecopeman's Avatar
 
Join Date: Jul 2008
Location: Kelowna, BC - summer; Florence, AZ - winter
Posts: 17,327
Mentioned: 22 Post(s)
Quote:
Originally Posted by tonyV View Post
Returned from a 12,000 k tour on the 2015 LT. Can someone help me understand the numbers. Kawasaki claim 5 more HP over my '08 but I cruise at 120 kph at 6000 RPM on the 15 and the '08 was at 5600 RPM. Both speedos are off by 6%. Yet the fuel mileage on the 15 is far better than the '08. Is it engine mapping? And where are the extra 5 ponies? Thanks
The '15 ALSO has an oxygen sensor, so it's NOW a closed-loop system, which MIGHT explain better gas mileage. MY experience also shows that the APPARENT speedo error is LESS than on older Vs.

For instance, on the '09 it showed 22km/hr (14 mph) per 1,000 rpm on the tach, while my '15 shows 21km/hr (13mph) per 1,000.

Also, the HP seems to be HIGHER in the rev range now.

Ed
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


'08 V AZ, '15 V650LT BC
Ride to D2D 2013, June '13

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


Ride to D2D 2015, June '15

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


Ride to D2D 2016, June '16

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
fasteddiecopeman is offline  
post #7 of 14 (permalink) Old 09-23-2015, 01:51 PM
Member
 
MaverickAus's Avatar
 
Join Date: Feb 2009
Location: Coffs Harbour, NSW, Australia
Posts: 2,039
Mentioned: 0 Post(s)
Garage
Quote:
Originally Posted by fasteddiecopeman View Post
The '15 ALSO has an oxygen sensor, so it's NOW a closed-loop system, which MIGHT explain better gas mileage.
? My 2012 has an O2 sensor
MaverickAus is offline  
post #8 of 14 (permalink) Old 09-23-2015, 01:52 PM
Member
 
invader's Avatar
 
Join Date: Mar 2008
Location: Kapuskasing Ontario Canada
Posts: 7,827
Mentioned: 2 Post(s)
Indicated speed to actual speed ratio will vary depending on ambient temperature, and also depending on which rear tire is used and its wear.
invader is offline  
post #9 of 14 (permalink) Old 09-24-2015, 03:35 AM
Member
 
Join Date: May 2015
Location: Poland
Posts: 217
Mentioned: 0 Post(s)
Quote:
Originally Posted by MaverickAus View Post
? My 2012 has an O2 sensor
Does it also have an O2 sensor in the exhaust? The new one does.

2015 Versys 650
_Big_Mac_ is offline  
post #10 of 14 (permalink) Old 09-24-2015, 05:49 PM
Super Moderator
 
fasteddiecopeman's Avatar
 
Join Date: Jul 2008
Location: Kelowna, BC - summer; Florence, AZ - winter
Posts: 17,327
Mentioned: 22 Post(s)
Quote:
Originally Posted by MaverickAus View Post
? My 2012 has an O2 sensor
That's BECAUSE you're NOT in Canada or the USA.

Quote:
Originally Posted by invader View Post
Indicated speed to actual speed ratio will vary depending on ambient temperature, and also depending on which rear tire is used and its wear.
OEM Dunlop rear, and I did NOT talk about ACTUAL speed, just comparing INDICATED speed vs rpm.

Ed
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


'08 V AZ, '15 V650LT BC
Ride to D2D 2013, June '13

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


Ride to D2D 2015, June '15

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


Ride to D2D 2016, June '16

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
fasteddiecopeman is offline  
post #11 of 14 (permalink) Old 09-25-2015, 07:14 AM Thread Starter
Member
 
Join Date: Jul 2015
Location: London, Ontario
Posts: 22
Mentioned: 0 Post(s)
thanks to all for the feedback and info. " Invader's" comments ring true. The 2015's aero package shone in a variety of wind conditions, especially 40 mph crosswinds in Kansas. I was expecting a Puig windscreen to be waiting for me when I returned to Canada, however only an " out of stock" email and a refund from Amazon were waiting. Tried emailing Madstad regarding their new screen and like many others on the forum.....no response. May wait til spring when there are more options. Cheers.
tonyV is offline  
post #12 of 14 (permalink) Old 09-25-2015, 12:02 PM
Member
 
saddlebag's Avatar
 
Join Date: Dec 2014
Location: Eutopia
Posts: 1,883
Mentioned: 3 Post(s)
Quote:
Originally Posted by tonyV View Post
Returned from a 12,000 k tour on the 2015 LT. Can someone help me understand the numbers. Kawasaki claim 5 more HP over my '08 but I cruise at 120 kph at 6000 RPM on the 15 and the '08 was at 5600 RPM. Both speedos are off by 6%. Yet the fuel mileage on the 15 is far better than the '08. Is it engine mapping? And where are the extra 5 ponies? Thanks
The problem is that people who dyno bikes give "peak" numbers instead of "total" numbers. The new bike may make a greater "peak" number but be less powerful overall.

Torque is another dumb thing they like to show. In itself, torque is meaningless. It only has meaning at a particular rpm...which is the power. Torque is superfluous.

In any event, power may have no meaning at all in how you are looking at it. The gearing could be completely different between the two bikes. And even if they were the same, they will both require the same power to travel at the same rate of speed, all else being equal. The difference would be that you may not need to turn the throttle as far on the more powerful one to get there. Don't confuse that with requiring less gas. It may be 10% more powerful than the old design and use 100% more fuel. The power being measured is the output power, not the input power from the fuel. To know that would require knowing the efficiency of the engine at every rpm.
MrKneeDropper likes this.
saddlebag is offline  
post #13 of 14 (permalink) Old 09-25-2015, 12:11 PM
Member
 
ronheater70's Avatar
 
Join Date: Aug 2015
Posts: 756
Mentioned: 0 Post(s)
According to my Tack and Speedo, I hit 70 MPH somewhere around the 5200 range

SO is that the Average?
ronheater70 is offline  
post #14 of 14 (permalink) Old 09-25-2015, 12:26 PM
Super Moderator
 
fasteddiecopeman's Avatar
 
Join Date: Jul 2008
Location: Kelowna, BC - summer; Florence, AZ - winter
Posts: 17,327
Mentioned: 22 Post(s)
Quote:
Originally Posted by ronheater70 View Post
According to my Tack and Speedo, I hit 70 MPH somewhere around the 5200 range

SO is that the Average?
Yes.

Ed
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


'08 V AZ, '15 V650LT BC
Ride to D2D 2013, June '13

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


Ride to D2D 2015, June '15

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


Ride to D2D 2016, June '16

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
fasteddiecopeman is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



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

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 not post new threads
You may not 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