Chain wear inspection - Kawasaki Z125 Forum
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post #1 of 10 (permalink) Old 06-03-2018, 09:49 PM Thread Starter
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Chain wear inspection

The Service Manuel has a ridiculous requirement for chain replacement in my opinion at .020 stretch at 20 links , and you have to remove the chain guard to check it ( .120 is more realistic ) and how many can accurately measure .020 at that length without buying the expensive chain measuring tool or calipers
.
I've used the old school 1 link stretch rule for 40 years and have never thrown or broke a chain that i can recall. (420 chain can stretch .420 on the overall chain length from the new length mesurement )
.
I've made a easier quick check method measuring underneath using 13 links, therefore you'll be more willing to check it more often . 13 links is the max links that can be measured without removing anything and using as many links as possible for a more accurate wear measurement . And measuring the ends of the outside plates is the same as measuring center to center of the pins.
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Pic's 2 & 3 is brand new chain dimension. (12")
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As always ... Just my .02
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post #2 of 10 (permalink) Old 06-03-2018, 09:56 PM
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You are right, that is the way to do it.

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post #3 of 10 (permalink) Old 06-05-2018, 11:18 AM
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Is there any mileage estimate on how long these stock chains last before being stretched too far? I know alot of it has to do with how you ride your bike and if you are stunting, but just the casual rider who rides WOT alot lol?
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post #4 of 10 (permalink) Old 06-05-2018, 07:29 PM Thread Starter
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Revision A

I misread the service spec' / The .020 was the tolerance for a new chain
.
Its actually .200 at 20 links (pins) / so that allows even more chain stretch than the old school 1 link rule that i use
.
So the Z125 service manual allows 12 1/4" for the 13 link (plates) measurement
.
And 50 1/2" at the 100 link measurement
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post #5 of 10 (permalink) Old 06-05-2018, 07:36 PM Thread Starter
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Quote:
Originally Posted by Z125rider View Post
Is there any mileage estimate on how long these stock chains last before being stretched too far? I know alot of it has to do with how you ride your bike and if you are stunting, but just the casual rider who rides WOT alot lol?
Seeing Actual results from us members here is probably only way to know .
It being a cheap chain, we cant use all the quality made chain estimates form the major chain MFG's
.
If some members here can post up there MILEAGE and 13 LINK MEASUREMENT we could all have a better idea. And it will get you to check your chain !
.
just to keep this a real average / lets assume everyone is doing reasonable adjustment and lube maintenance on there chain.

Also, Lets Keep it simple and use only 1/32" increments
.
12"
12 1/32"
12 1/16"
12 3/32"
12 1/8 " ............ and so on.
.
I'm not at home right now or I would start it off.


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post #6 of 10 (permalink) Old 06-06-2018, 04:45 PM Thread Starter
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1,600 miles / 12 1/32"

Just checked my stock chain . I took it off around 1,600mi and its at 12 1/32" at 13 links (plates)
But its off the bike and i'm just pulling it tight by hand.

I've always read that all new chains will usually stretch a good amount during the first 100mi
And after the first couple of adjustments it will stretch (wear) at a much slower ratio

And that the stock Z' chain is cheap chain ?
Maybe the myth about the stock chain is crap , got a bad rap

This post could be a Myth Buster


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post #7 of 10 (permalink) Old 08-08-2018, 10:13 PM
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I'm at just over 7000 miles and I have maxed out the stock adjustment completely and the chain is still loose as ****...

Havnt measured yet.

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post #8 of 10 (permalink) Old 08-08-2018, 10:24 PM
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Cut a link out?

My site:
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post #9 of 10 (permalink) Old 08-08-2018, 11:20 PM
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Buy an MX chain, they don't cost much.

'17 Z125 PRO - Candy Lime Green
Shorty LeversSeat Strap DeleteLED City & Tag LightsVagabond Fender Eliminator
90 Valve stems15wt Fork OilZOom Loop ExhaustHD Clutch KitProTaper Mini High w/ 1.25" Risers
ODI Lock-on Grips w/ KLX110 Throttle CamPT420MX ChainEbay SpoolsYoshi RS2 db KillerMictuning H4 LEDOE Intake



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post #10 of 10 (permalink) Old 09-16-2018, 08:49 PM
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Kaw'ee: THANK-YOU for doing this diagram. I have saved it to my Z125 folder on my computer!

Jim G
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