Broken Swing Arm

[Neggy]

Ya I forgot about having to break the chain too...

But back to the point, I have never seen or heard of a ZRX swing arm breaking like that, and I can't see any way to do it unless the pinch bolt was beat in with an impact wrench WITH the eccentric removed.

We have seen every ham fisted ape in need of having their tool box welded shut wander thru here in the last 2 decades, and as I said none of us have seen this before.

To the OP: the easiest way to break the master link is to take a dremel tool ( or any powered small grinder type tool) and grind the pins flush then push them thru, and then use a chain tool to replace the master mushrooming the pins.

[zarex]

I don't think you could over torque it without stripping the threads. You already have a junk swingarm see how much torque the other side will take to strip or break.

^This here.
Once you know you're going to throw the swing arm out it would be interesting to see what happens when it's over torqued with the eccentric in place.

The torque spec for that bolt is 29 ft/lbs. Take a torque wrench and go 10 lbs at a time til something gives.
My guess is the threads strip.

[TGHW]

^This here.
Once you know you're going to throw the swing arm out it would be interesting to see what happens when it's over torqued with the eccentric in place.

The torque spec for that bolt is 29 ft/lbs. Take a torque wrench and go 10 lbs at a time til something gives.
My guess is the threads strip.

It's not from over torqueing alone. Doing what you are suggesting won't do shit. Hit it with an impact gun as we've been talking about for maximum effect. Even then, my guess is that 90-100 times it will pull the threads out. It's a freak failure that will likely be hard to reproduce.


TG

[Parko]

Send it to James Compton for repair.

Then you can be rid of those stupid essentrics.

[Deerslayer64d]

Send it to James Compton for repair.

Then you can be rid of those stupid essentrics.

Attachment 312171Attachment 312172

I was there just yesterday for a visit and always over that S A !

[budzrex]

I was there just yesterday for a visit and always over that S A !

Looks like he cleaned up the drool I left on it last time. Hey Gordon how you been have not seen you for a while

[zarex]

It's not from over torqueing alone. Doing what you are suggesting won't do shit. Hit it with an impact gun as we've been talking about for maximum effect. Even then, my guess is that 90-100 times it will pull the threads out. It's a freak failure that will likely be hard to reproduce.


TG

I have to disagree. Using the torque wrench will find out for us just how much that set up will take. The impact will probably destroy it then we learn nothing.
I'm always afraid that the 29 ft/lbs is too much and one day it'll strip out. If nothing happens by 60 or 70 lb/ft then by all means put the impact on it, hopefully on video.

I just now came in from adjusting my chain and I was afraid, especially because I put antisieze on the bolt threads to keep them from galling the aluminum threads.

[BASpro]

I have to disagree. Using the torque wrench will find out for us just how much that set up will take. The impact will probably destroy it then we learn nothing.
I'm always afraid that the 29 ft/lbs is too much and one day it'll strip out. If nothing happens by 60 or 70 lb/ft then by all means put the impact on it, hopefully on video.

I just now came in from adjusting my chain and I was afraid, especially because I put antisieze on the bolt threads to keep them from galling the aluminum threads.

Where does your fear come from? I've been doing ZRX chain adjustments for years using anti-seize and 29 Ft\Lbs without issue.

[KWICK]

Where does your fear come from? I've been doing ZRX chain adjustments for years using anti-seize and 29 Ft\Lbs without issue.

Agreed.
A junk torque wrench might change the odds, but....

[goerion]

Send it to James Compton for repair.

Then you can be rid of those stupid essentrics.

Attachment 312171Attachment 312172

Is this pain I feel envy?

Verstuurd vanaf mijn Moto G (5) Plus met Tapatalk

[TGHW]

Where does your fear come from? I've been doing ZRX chain adjustments for years using anti-seize and 29 Ft\Lbs without issue.

Yep, anything less and the eccentrics tend to slip when doing wheelies or hard launches.


TG

[Perko]

This thread gives me wood ....... because it wasn't me that caused it.

SS

[Perko]

Send it to James Compton for repair.

Then you can be rid of those stupid essentrics.

Attachment 312171Attachment 312172

I once asked James why he's (see what I did < over there) never braced a 1200 swingarm ..... his answer, true story

























It doesn't need it.



Me what does he know ..... it just looks badass.


Then


Now except the shocks are a couple notches up on those in that ^ picture as it sit in the shop right now.


SS

[zarex]

Where does your fear come from? I've been doing ZRX chain adjustments for years using anti-seize and 29 Ft\Lbs without issue.

OK, troof be told I wasn't afraid, never was, but I'd certainly like to see how much torque it takes to break that clamp/bolt/threads whatever. Am I alone on this?

I like the eccentrics. I think they're beautiful. There are so many bikes with the nut and bolt adjusters that look like an afterthought. Especially the ones that stick out the end of the swing arm. Few do them right.
And then there's the axles with castle nut and cotter pin. Ooof.

[AV80R]

Yeah, only fancy bikes like the 916 had an eccentric adjuster. A really, really big one!

[Perko]

Yeah, only fancy bikes like the 916 had an eccentric adjuster. A really, really big one!

Like that?

SS

[schmoo]

Yeah, only fancy bikes like the 916 had an eccentric adjuster. A really, really big one!

Or maybe a zrx.

[AV80R]

Or maybe a zrx.

:

[zarex]

Anything further on the breaking of the swingarm?

[zrx24]

...but I'd certainly like to see how much torque it takes to break that clamp/bolt/threads whatever. Am I alone on this?

Yes.

[zarex]

Yes.

I guess so.