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PostPosted: Sat Jun 06, 2015 12:07 pm 
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Location: Metro Atlanta, GA
Can anyone tell me what length/diameter PVC pipe is recommended by Progressive for use as spacers with their 11-1119 SR500 fork springs?
I'd like to make some of different lengths before my springs arrive.

Thanks.

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PostPosted: Sat Jun 06, 2015 9:15 pm 
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I just had mine out today, I added 2 washers to increase the preload.
I had about 3/4 or 1 inch long pieces of pvc pipe in there.

I looked for the instructions but can not find them.

Vast improvement in the forks.


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PostPosted: Sat Jun 06, 2015 9:43 pm 
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What diameter pipe, and what total length (spacers and shims combined)?

Thanks, brett. I can always count on you for straight answers. A refreshing thing in this day and age.

Don't you have any concerns about PVC pipe failing at a really bad moment?
I have visions of one or both of them breaking during cornering.
I can't escape the thought that a solid spacer with a shoulder turned down to be a spring guide to keep it centered would be a better bet.

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PostPosted: Sun Jun 07, 2015 10:07 am 
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I found some Nylon spacers @ the hardware store, just the right diameter. I think I've got two 3/8" spacers either leg.


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PostPosted: Sun Jun 07, 2015 11:35 am 
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There's no need for any kind of centering shoulder, everything is inside a tube. Where's it gonna go?
RD Bob.


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PostPosted: Sun Jun 07, 2015 6:37 pm 
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3/4 inch I think.
It will not break, the force is on end and not high, the stock steel tubes are paper thin, so the pvc would be much stronger.
Try 1 inch long spacers to start.


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PostPosted: Mon Jun 08, 2015 9:03 pm 
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Will do, Brett. My springs came in today. Looks like they have an OD of about an inch, so 3/4" PVC pipe should be the right diameter.

Where can I get (and what is the right weight) the needed fork oil?

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PostPosted: Mon Jun 08, 2015 9:23 pm 
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I left the stock oil in there.
Its 10 weight I think.
Any bike store should carry all kinds of fork oil.


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PostPosted: Sun Jun 14, 2015 8:07 pm 
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OK, 3/4" PVC pipe is not going to work.
A 3/4" length of it goes in until the top is flush with the top of the threads.
Then, it gets stuck and won't go further.
I'll measure the OD of the springs and of some 1/2" PVC pipe and see if it is right.

Otherwise, I'll have to put that new belt on my lathe and turn some from Delrin, brass, or steel-depending on what I have available.

I'm a bit frustrated with it at the moment because I really wanted to try out the new springs this weekend.

Anyway, the entire affair turned into a near catostrophic, sad, comedy of errors. :x

At least I got my new saddlebags installed.

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PostPosted: Sun Jun 14, 2015 11:07 pm 
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Do you even really need them? Arent the new springs supposed to be long enough as sent and if you find you need/want to fine tune you use a spacer?
If you must have them for preload it is just PVC, rotate it on a belt sander or even a bench grinder to pop off a little bit so it can slip in there. But, you may say, it isnt pretty. It isnt seen either.

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