How much force for chain slack measurement? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
General V-Strom Discussion Talk about all things V-Strom not limited to just one of the above models

 7Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 Old 03-29-2019, 11:21 PM Thread Starter
Stromthusiast!
 
Hogges's Avatar
 
Join Date: Mar 2018
Location: Vermont
Posts: 415
Garage
How much force for chain slack measurement?

Hi,

I follow the owner’s manual for chain tensioning, but it does not say just how much pressure one should apply to the chain to measure the chain tension. It seems the chain has some “give” so I can easily measure 1” of slack with some force applied up and down with one finger, so maybe that’s good, but it feels kind of tight to me even in the rest position.

Thanks for your advice, 20 year Harley rider, so I am new to this chain thing...
Hogges is offline  
Sponsored Links
Advertisement
 
post #2 of 11 Old 03-29-2019, 11:52 PM
Stromthusiast!
 
kd70qc's Avatar
 
Join Date: May 2016
Location: Alabama
Posts: 784
Garage
I measure it near the front of the rear tire which is about half way between the sprockets with either a tape measure standing up from the floor, or a ruler pressed against the tire in a vertical orientation. Regarding the amount of force, I press about hard enough to bruise a fresh tomato (how’s that for a reference!?). You can press harder, but the measurement won’t increase by a significant amount.

I measure the maximum amount of deflection at the top of the chain from pressing down on it to pressing up on it.

Notice the link to similar threads below this thread. They may explain it better there.
Brockie and Motor7 like this.

2015 DL650XT w/ factory Suzuki/Motech side cases and engine guard.
First farkle - Motech center stand
Suzuki handguards
Augustus Wind Deflectors
Fat, foamy grips
Givi AirFlow windscreen
Go-Cruise throttle lock
JD Astar 1260 lumen LED tail light bulb
Suzuki (SW Motech) Top Case
Hyde Racing skid plate
Adventuretech kickstand foot, fork brace, fender raising kit, and peg lowering kit.
Zita 26mm up / 20mm back risers
Sit and Fly Seat Net

So God created man in His own image; in the image of God He created him; male and female He created them. Genesis 1:27
kd70qc is offline  
post #3 of 11 Old 03-30-2019, 12:33 AM Thread Starter
Stromthusiast!
 
Hogges's Avatar
 
Join Date: Mar 2018
Location: Vermont
Posts: 415
Garage
Kd70qc, thank you. I don’t see linked threads? All, sorry, just noticed the tech section where this should have been posted.
Hogges is offline  
 
post #4 of 11 Old 03-30-2019, 08:22 AM
Stromthusiast!
 
STCorndog's Avatar
 
Join Date: Nov 2016
Location: Kentucky
Posts: 3,662
I would say maybe 5 pounds. To where tension just starts to be felt, plus a little more, to settle the chain into all the sprocket teeth. I adjust chains to between 1.2 and 1.5 inches.

"If its not broke yet, it can still be fixed"
STCorndog is online now  
post #5 of 11 Old 03-30-2019, 10:08 AM
Stromthusiast!
 
Join Date: Mar 2011
Location: Pasadna area
Posts: 13,581
I use my foot, Can you lift the chain slack 1-1 1/2 inch? Slack is just that, the loose amount that allows the swingarm to do its thing without the chain getting tight.
There may be a slight difference if the bike is on the side stand or the center stand.
Looser is better than tight.
notacop is offline  
post #6 of 11 Old 03-30-2019, 10:11 AM
Stromthusiast!
 
Join Date: Dec 2013
Location: Puget Sound, and Allegheny County (PA)
Posts: 788
Garage
When you press a stick or your soon-grimy finger upon the middle of the chain, its shaped changes from a gentle curve (known as a catenary) to a pair of less gentle curves (also catenaries.) At forces reasonably easy to apply, these less gentle curves closely approach straight lines visually. That limiting "shape" limits how far your stick can move from one extreme to the other without breaking something.[a] With 10 pounds of force, it gets well with a tenth of an inch of the hard limit. The factory recommended chain slack check method and result limits already accommodate some variation in how much force people will apply. So you can be confident that pushing until it looks straight (without using a straight-edge) is good enough.

[a. The stick (or your finger) will break before the chain or swingarm does. ]

If you really want to over-think or over-do that adjustment, there was an earlier thread here on the subject.
Trepidator is offline  
post #7 of 11 Old 03-30-2019, 10:28 AM
Stromthusiast!
 
Spec's Avatar
 
Join Date: Jun 2012
Location: Gateway to Death Valley
Posts: 3,472
Garage
Quote:
Originally Posted by notacop View Post
I use my foot, Can you lift the chain slack 1-1 1/2 inch? Slack is just that, the loose amount that allows the swingarm to do its thing without the chain getting tight.
There may be a slight difference if the bike is on the side stand or the center stand.
Looser is better than tight.

This!

Catenary curves or not it's better to err on the loose side than tight.

To tight a chain can damage the bike. The primary shaft seal and eventually the bearing itself can fail because of excessive tension.

I push up the chain at about the halfway point on the swingarm (with my boot) it should just about touch the swingarm.

Never measured the actual travel looks to be about 1.5" or so. When the bike is on the sidestand there is a slight sag apparent in the chain.
notacop and RestoRider2017 like this.

And now these three remain: faith, hope and love. But the greatest of these is love. 1 Cor 13:13
Spec is online now  
post #8 of 11 Old 03-30-2019, 01:45 PM
Stromthusiast!
 
locoblanco's Avatar
 
Join Date: Aug 2017
Location: Arizona
Posts: 876
Garage
Quote:
Originally Posted by Hogges View Post
Hi,

... 20 year Harley rider... new to this chain thing...
Wow, that makes me feel old. I remember when Harleys had chains, and bikers wore a master link in their boot buckle in case of chain failure.

But to the point, not much pressure is required, just push on the chain until it feels snug. As mentioned, a bit on the loose side of the spec is better.
To check wear, try to pull the chain back from the center of the rear sprocket. If you can see daylight between the chain and sprocket, it's shot. Replace it and both sprockets as a set for best results.

I don't want a pickle, I just want to ride my motorsickle. A. Guthrie.
locoblanco is offline  
post #9 of 11 Old 03-30-2019, 06:15 PM Thread Starter
Stromthusiast!
 
Hogges's Avatar
 
Join Date: Mar 2018
Location: Vermont
Posts: 415
Garage
Thanks all. I had set it too tight after I had switched to a 16T sprocket this winter. Once I loosened it a half turn just now this whole slack thing made much more sense. I had it at 1/2” and I think I could even hear a difference in noise. Hope I didn’t damage anything, probably rode 40-50 miles like that.
Hogges is offline  
post #10 of 11 Old 03-30-2019, 07:19 PM
Stromthusiast!
 
branthopolis's Avatar
 
Join Date: Aug 2016
Location: Atlanta-ish...
Posts: 258
Garage
Don't be afraid to err a bit on the loose side.. Strom likes a loose chain..
VSrider likes this.

~Mark

2015 DL1000A
2005 YZ250
branthopolis is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums 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
Chain slack - force when adjusting ERockJL V-Strom Service and Maintenance Questions and Discussions 14 06-20-2018 11:17 AM
Chain Slack Measurement ianbh DL650 and DL650A - 2004 to 2011 2 07-01-2012 06:03 PM

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