Fork tube straightening

flipper

Full Member 2012/2013

Posts: 260

« on: July 06, 2013, 06,31:10 AM »

I picked up a drum brake front end for an '83 TT600 a little while back.

Intitally it looked to be okay, but upon disassembly, I've discovered that the chrome fork tubes have a slight bow in them.

If you roll the chrome tubes on a flat surface, there is about 3mm of bend in the overall length - not a huge amount, but it is causing binding of the forks when they are compressed without the springs in place.

Does anyone know of a place that can straighten these out?
And what sort of cost is associated with it?

Thanks
Peter


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john t

Committee 2013/2014

Posts: 645

Club Captain

Re: Fork tube straightening

« Reply #1 on: July 06, 2013, 07,07:00 AM »

Quote from: flipper on July 06, 2013, 06,31:10 AM

Garage press and a block of wood should do the trick


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flipper

Full Member 2012/2013

Posts: 260

Re: Fork tube straightening

« Reply #2 on: July 06, 2013, 08,19:37 AM »

Knowing my luck, I'd probably squash the tube flat!

I was under the impression that it needed to be done with v-blocks and a dial gauge to make sure it was straight.


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steve f

Full Member 2013/2014

Posts: 223

Re: Fork tube straightening

« Reply #3 on: July 06, 2013, 10,11:30 PM »

John is right it will straighten it but be careful. "V" blocks and dial indicator is the ideal way of doing it but not everyone has them and probably a over kill.


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Phil E

Full Member 2013/2014

Posts: 41

Re: Fork tube straightening

« Reply #4 on: July 06, 2013, 11,11:52 PM »

I would take it to a suspension specialist. I use SPMX in Seaford.


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Serge C

Full Member 2013/2014

Posts: 3011

Re: Fork tube straightening

« Reply #5 on: July 06, 2013, 11,17:45 PM »

Quote from: Phil E on July 06, 2013, 11,11:52 PM

I would take it to a suspension specialist. I use SPMX in Seaford.

Or speak to Chad at Chad's Offroad Setups. He's a good AMTRA friend and has been hassled by some of my requests over the years!


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john t

Committee 2013/2014

Posts: 645

Club Captain

Re: Fork tube straightening

« Reply #6 on: July 07, 2013, 01,46:06 AM »

Quote from: flipper on July 06, 2013, 08,19:37 AM

Knowing my luck, I'd probably squash the tube flat!

I was under the impression that it needed to be done with v-blocks and a dial gauge to make sure it was straight.

Each to there own
As you said it is only 3mm deviation
cut your self 3 vee blocks out of wood if you have a hole saw the same size as the fork tube even better drill a hole
in the wood and cut it half set it up an the bench mark your high spot and give it a gentle press if it doesn't work
take it to a shop
nothing venture nothing gained
PS only use wood near fork tube


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