Gear ratio - Page 3 - Kawasaki KLR 650 Forum
KLR & Other Motorcycle Related Discussion Grab a seat and discuss whatever you like about the KLR or other related topics. Within reason.

 16Likes
Reply
 
LinkBack Thread Tools Display Modes
post #21 of 78 Old 08-05-2016, 05:16 AM
2nd Gear
 
frostbitevinnie's Avatar
 
Join Date: Oct 2015
Location: St. Cloud, MN
Posts: 259
I run a 14 in the front cuz I like the extra umph. I have also noticed that my hands are less stressed due to the higher revs. It seems that the lower revs irritates my nerves?

'01 KLR 650, '09 Suzuki DL650, '08 Suzuki Bandit 1250, '16 CRF1000L, '09 KLX 250s
frostbitevinnie is offline  
Sponsored Links
Advertisement
 
post #22 of 78 Old 09-11-2016, 04:14 PM
Neutral
 
Join Date: Sep 2016
Posts: 3
Hi, I was thinking about buying a 2011 KLR 650. Most of my driving would be highway, around 70-80 mph. It has the original 15 sprocket. I don't want to be sitting at 5000 rpms for an hour straight, but I love this bike. Would this bike be able to handle all those highway miles? And what sizes should I change the sprockets to if I want to reduce the rpms?
Squatchy is offline  
post #23 of 78 Old 09-11-2016, 04:53 PM
1st Gear
 
Join Date: Jun 2016
Posts: 36
Quote:
Originally Posted by Squatchy View Post
Hi, I was thinking about buying a 2011 KLR 650. Most of my driving would be highway, around 70-80 mph. It has the original 15 sprocket. I don't want to be sitting at 5000 rpms for an hour straight, but I love this bike. Would this bike be able to handle all those highway miles? And what sizes should I change the sprockets to if I want to reduce the rpms?

Start with 16t front sprocket!
James M is offline  
 
post #24 of 78 Old 09-11-2016, 04:59 PM
Neutral
 
Join Date: Sep 2016
Posts: 3
I'm also a pretty big guy. Should I change the back sprocket too? I was thinking 16/40 based on gearing commander. Would that cause any harm to the bike?
Squatchy is offline  
post #25 of 78 Old 09-11-2016, 10:21 PM
5th Gear
 
Join Date: Jan 2011
Posts: 4,712
EXECUTIVE SUMMARY: You'll get LESS "oomph" with 16/40, than with 15/45 (stock), 16/45 (popular choice), or certainly, 14/45, according to my calculations.

The 16/40 you propose multiplies torque far less than 15/45 (stock); considerably less than 14/45. The excessively high (low numerical) gear ratio likely could ultimately damage engine/bearings/etc. from excess lugging, especially when the bike is heavily weighted, seems to me.

Work the reciprocal division and compare the numbers. What does that mean? The reciprocal of 15/45 is 3.0; the final drive ratio of a stock KLR. The countershaft must rotate three times for the rear wheel to rotate once; the final drive ratio is 3.0. 14/45? Final drive ratio, about 3.2: countershaft sprocket must rotate 3.2 times for the rear wheel to rotate once. 16/40? Final drive ratio, 2.5--rear wheel rotates ever 2.5 countershaft revolutions.

Looking at a common mod, 16/45: Final drive ratio is about 2.8; yeah--rear wheel turns once in 2.8 countershaft revolutions. Your 16/40 2.5 drive ratio's pushing things, IMHO; suggest you check your calculator again.

One countershaft sprocket tooth corresponds to three rear sprocket teeth, considering stock gearing as a baseline.

DISCLAIMER: My postulations only; corrections, clarifications, and contrary opinions welcomed, as always!

Last edited by Damocles; 09-11-2016 at 10:30 PM.
Damocles is offline  
post #26 of 78 Old 09-11-2016, 10:40 PM
Neutral
 
Join Date: Sep 2016
Posts: 3
Thanks for all the information and quick responses! I think I'm going to go with the 16/45.
Squatchy is offline  
post #27 of 78 Old 09-11-2016, 10:55 PM
1st Gear
 
Join Date: Jun 2016
Posts: 36
Im a bigger guy too. I did the 16t with stock rear as well as klx jet kit. I wouldnt change a thing IMHO its far better on highways!
James M is offline  
post #28 of 78 Old 09-22-2016, 04:25 PM
1st Gear
 
BigUglyGreenKLR's Avatar
 
Join Date: Sep 2016
Location: Northern California
Posts: 37
I tried the 16 tooth front sprocket with the stock rear sprocket. It did reduce the RPM, but it didn't do anything else. It did not increase gas mileage. In fact I got less gas mileage. I think the motor would bog down more if I got into heavy mud or on a steep hill, but it has been a long time since I had it, so I can't remember.



.

Last edited by BigUglyGreenKLR; 09-22-2016 at 05:31 PM.
BigUglyGreenKLR is offline  
post #29 of 78 Old 09-22-2016, 05:41 PM
5th Gear
 
Join Date: Aug 2010
Location: Kelowna, B.C.
Posts: 2,833
14/43 = 3.07
15/43 is the stock gearing = 2.86 ratio
16/43 = 2.68
17/43 = 2.52



I run the stock rear on my 2000 and a 44 on my 2001 and swap between 14, 15 and 16 tooth C/S sprockets for a high ratio of 2.68 and a low of 3.14, a difference of 17%



Dave
DPelletier is offline  
post #30 of 78 Old 02-11-2020, 02:45 PM
2nd Gear
 
Join Date: Jan 2019
Location: Long Island, NY
Posts: 119
Garage
Anyone have some experience with a 17T front that they would like to share?

2003 KLR650.... With all the bells and whistles
MTKKLR is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki KLR 650 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



Similar Threads
Thread Thread Starter Forum Replies Last Post
Kid's gear? SLO-KLR Bike and Rider Gear 6 01-08-2016 11:30 PM
My gear so far KLR-zin Bike and Rider Gear 1 02-09-2010 01:15 AM
first new gear on the 08' Capt stan KLR & Other Motorcycle Related Discussion 3 08-16-2008 09:09 AM

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