Progressive spacer size - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 13 (permalink) Old 10-13-2016, 01:52 PM Thread Starter
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Progressive spacer size

Hi all!

I plan on taking apart and re-building my front forks tomorrow because my fork seals are leaking. While I'm at it I figured that I would install the progressive forks springs, but I'm wondering what size spacer people used. I've read that some use 1" pvc, but that 1" was too big for others who had to use 3/4". Which is the correct size diameter? Unfortunately, I don't have the tools to cut the stock spacers down. Thank you!

Brett
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post #2 of 13 (permalink) Old 10-13-2016, 02:10 PM Thread Starter
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Also, the springs I got are #11-1128. I just want to confirm that I'm not lowering the bike with these and that I will remain at the stock height? I have long legs at touch the ground easily.
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post #3 of 13 (permalink) Old 10-13-2016, 02:21 PM
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You got the right springs. 3/4" sounds too small...1 inch should be right, but that's not "1 inch interior".... that's 1 inch on the outside.
I cut my stock ones to 7-1/4" in length .... So didn't use pvc...which means there is a small chance I'm wrong

EDIT: A quick glance at the procedure in the Verses shows I got it right...1" (outside) diameter schedule 40 PVC. There was something there about using a 3/4" dowel...just to push plug down so you can remove the circlip.
You might want to read through it yourself:

https://www.vn750.com/forum/43-wheels...e-springs.html

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post #4 of 13 (permalink) Old 10-13-2016, 04:16 PM Thread Starter
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Thanks for the quick reply Knifemaker. I've read through that post and will be referencing it as well as the video and my Clymers manual as I work tomorrow. Should be fun!
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post #5 of 13 (permalink) Old 10-13-2016, 06:04 PM
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Don't forget your protective eyewear. There have been quite a few that got close to getting nailed by the spring shooting out the top plug....(either when trying to remove or when reinstalling)
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post #6 of 13 (permalink) Old 10-13-2016, 11:05 PM Thread Starter
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good call knifemaker! I just picked up some protective glasses and the pvc spacers tonight. It turns out that the 3/4" pvc has a 1" outside diameter. Thanks for the help. I'll post tomorrow when I'm done!
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post #7 of 13 (permalink) Old 10-14-2016, 05:12 PM
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I cut my spacers a bit longer than the instructions mentioned in order to add some pre-load tension. I figured I could always cut some more off, but not as easily add length later if I didn't like it.
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post #8 of 13 (permalink) Old 10-16-2016, 01:00 AM Thread Starter
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The job went smoothly enough and no more oil leak! I'm very happy with the progressive springs. I went with 7 1/4" spacers. Dealing with the brakes showed me that my next job should be to thoroughly clean them, bleed the system, and then refill with fresh brake fluid. When I turned the wheel after putting it back on I noticed the brakes dragging against the rotors. I've read that some dragging is normal but since I don't have any previous experience with bikes (or any kind of mechanics for that matter) it's hard to tell if what I'm getting is too much. Hopefully, cleaning the calipers will loosen the pistons and allow a little extra clearance for the pads on the rotors. Anyway, thank you guys for your help. This forum rocks!
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post #9 of 13 (permalink) Old 10-16-2016, 12:18 PM
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Well glad it all went well. Front pads do drag a bit normally...but yes, cleaning the calipers and putting in fresh brake fluid is a good idea anytime you don't know when the last time it was done

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post #10 of 13 (permalink) Old 10-16-2016, 12:21 PM
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does the front wheel roll freely or does it take a little force?

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