Progressive 430 or 440 shocks on 750 - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 15 (permalink) Old 05-28-2013, 01:31 AM Thread Starter
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Progressive 430 or 440 shocks on 750

I have a 2002 750 that is in need of new shocks. I would LIKE to put Progressive 430 or 440 shocks on since my wife and I ride two up quite often. Since I am a cheapskate, I hate to pay new prices when some good deals appear to be available on Ebay. However, the shocks that fit without modifications are limited. My question for you all is this: Which model Progressive 430 or 440 shocks have you been able to install and what modifications did you have to make in order to do this? Any help would be appreciated.
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post #2 of 15 (permalink) Old 05-28-2013, 09:22 AM
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There's a lot of info in the Vulcan Verses on installing progressive springs in the stock shocks:

https://www.vn750.com/forum/showthread.php?t=1116

Maybe that helps.

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post #3 of 15 (permalink) Old 05-28-2013, 09:49 AM
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Quote:
Originally Posted by Ceal View Post
There's a lot of info in the Vulcan Verses on installing progressive springs in the stock shocks:

https://www.vn750.com/forum/showthread.php?t=1116

Maybe that helps.
Good info there Ceal, but I'm afraid the question is about REAR shocks, not front fork springs which is what most if that link deals with.

Stock rear shocks measure 12.5 inches "eye to eye"....so any shocks off another bike using the same mounts and around the same length can be used.

I had a set of Progressive 420's. think they are a bit cheaper than the 430 or 440 series. With preload set up a tad they were fine for two up riding.
If you or your passenger is a bit heavy...they make a "heavy duty" 420 that might be better for you. If you and your passenger are under 300 lbs and you do alot of solo riding too the regular shock should be fine.

There's a few threads on using Harley rear shocks here somewhere too..

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post #4 of 15 (permalink) Old 05-28-2013, 10:13 AM
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The progressive 412HD is available for around 225 to 250 bucks new.The HD has heavier springs than the regular 412,I ran the 412 on my 1500 till I put bags and a trunk on it and if I buy new ones it will probably be the 412 HD since I am a heavy weight.The 412 was a good performing shock,But I needed more load carrying capacity.




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post #5 of 15 (permalink) Old 05-28-2013, 11:12 AM
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lol sorry... I kept reading the word "shocks" on the Verses info and didn't pay much attention to other stuff.

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post #6 of 15 (permalink) Old 05-28-2013, 12:28 PM Thread Starter
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First of all, thanks for your replies, folks. I do appreciate your suggestions. However, I'm still scratching my head a bit. I know I can go online any day and buy new shocks that fit the 750 ideally. However, I'm looking for an Ebay deal. I don't mind doing a bit of modification to make something work but I don't want to bang my head against it only to find I wasted the money and got nothing for it but a headache. As an example, a set of Progressive 440s (model number 440-4050C) with only 1500 miles on them is currently listed for a pretty good price (about 1/3 of new). They came off a Harley FXR bike (don't know any more than that). Of course, checking the internet to see whether they fit a 750, it says they don't. But the same would be said about a VN900 seat on a 750 which we know can be done without too much trouble.

So... what have you all found that works reasonably well and has anybody worked with that particular model of Progressive 440s?


BTW, with regard to weight, when my wife and I ride together we put about 375 pounds on the it without luggage and I'm not saying SHE'S heavy! She thought she was marrying Robert Redford and got the Pillsbury Doughboy instead!

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post #7 of 15 (permalink) Old 05-28-2013, 01:17 PM
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I believe as long as you get the correct length shock you can press in the bushings from your stock shocks. Shouldn't be an issue. I'm sure someone will chime in with the definitive information.

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post #8 of 15 (permalink) Old 05-28-2013, 04:56 PM
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I believe as long as you get the correct length shock you can press in the bushings from your stock shocks. Shouldn't be an issue. I'm sure someone will chime in with the definitive information.
The progressive bushings are not interchangeable with Stock Kawi. At least not on the 412. Been there ,done that.

I bought mine the same way the OP did,used ,on another forum.




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post #9 of 15 (permalink) Old 05-28-2013, 04:58 PM
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I put a set of used Harley progressive shocks on mine. The holes in the bushings are smaller and wider than the mounting studs. Rather than press out the stock bushings and swap them into the new shocks, I used a 9/16" drill bit and drill press (9/16" is just a touch big but I couldn't find the perfect bit). I also used a cutoff wheel to take some of the width off of the bushings. They bolt right up and dropped the rear by about 1 1/2" at the top adjustment spot.



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post #10 of 15 (permalink) Old 05-28-2013, 08:28 PM Thread Starter
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Are all the Vulcan mounting bolts the same diameter so that a shock that fits, say, a Vulcan 900 or Mean Streak would fit the 750?
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