Rear Suspension upgrade to Progressive 444 - ColtMax's 1997 Restoration thread #16

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ColtMax

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This thread is part of a series, you can find the list of all other threads related to my overall restoration here: ColtMax's 1997 Restoration thread.

PARTS SELECTION STRATEGY:

Requirements (in synch with the
front suspension)
I use my Vmax as a cruising bike, although I like to twist the throttle a lot, I want this bike to be comfortable for long rides (8+ hrs). I also ride with my wife occasionally. Our combined weight is nearing 400lb once all geared up.
The roads up here in Quebec are pretty bad, crack bumps, hole... you name it.. it's there. For this reason I would like to have a rear suspension that rides smoothly while providing proper support for riding with passenger. I would also like the suspension to better absorb those big bumps without getting the rear end air born.

Budget:
I wanted to keep the cost for rear shocks as low as possible, but the fact that I would like to have a good valving logic to deal with the bumps is getting the price to jump bit higher than expected.
If I can keep it below 1000$ CAD that would be great. After all, these are the shocks I sit directly above, might as well put a few more bucks downs to save my back.

Options:
I'll cover the ones I have looked at, but do not hesitate to tell me about different setups. I'll document them in here to. Just make sure to give me some pros and cons so future members can decide for themselves what they need.


Option 1 - Progressive Suspension 412
1738030348188.png
Pros:
- Still listed for Vmax and in stock from Progressive​
- Affordable (MSRP: 344USD$ a pair)​
Cons:
- Only 5 spring preload adjustment settings (not adjustable by hand)​
- No FST or Deflective disc technology​



Option 2 - Progressive Suspension 430
1738030398288.png
Pros:
- Still listed for Vmax and in stock from Progressive (Chromed version)​
- Spring preload is adjustable by hand and to a multitude of settings​
- Reasonable price (MSRP: 630USD$ a pair)​
- Deflective disc technology​
Cons:
- No Frequency Sensing Technology (FST)​
- Price difference with the 444s might not be worth cheeping out on the FST​



Option 3 - Progressive Suspension 444 (Selected)
1738030256049.png
Pros:
- Great suspension technology with Frequency Sensing Technology (FST) and Deflective Disc Damping​
- Spring preload is adjustable by hand and to a multitude of settings​
Cons:
- Not available anymore for Vmax. Stock for the Vmax's listed part numbers have become very difficult to find. Some equivalent Part Numbers have been confirmed to work on Vmax​
- Quite pricey (Around 800USD$ a pair)​


Option 4 - Ohlins STX36
1738030850911.png
Pros:
- Apparently these are la crème de la crème when it comes to performance shocks​
- Nice looking (not a decision factor for me, but I can understand why people find their look appealing)​
Cons:
- Will put a significant dent in your wallet (MSRP: 1400USD$)

 
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Choosing the right equivalent 444 from HD
I have selected the 444s mainly due to this post from @82ndCowboy. I cross verified the old Vmax recommended 444 Part Numbers to the equivalent ones from Harley Davidson. And the 444-4020B/C (Black or Chromed) has the exact same specs as the discontinued Vmax 13 inch Standard spring rate part no. 444-4212B/C.

I have created this Spread Sheet using data from Progressive Suspension to highlight the other potential replacement candidates depending on your desired ride height and spring rate.

Based on their immediate availability and @82ndCowboy's feedback about the way his 444-4020Bs are operating, I decided to go that route too:
- 13 in length same as origin
- 105/150 Standard spring rate. I might regret not going to the Heavy Duty, but I will give them a try... they are already home ;)


Here is the side by side spec comparison between the Vmax 444-4212 Standard 13in and the Harley Davidson Standard 13in 444-4020:
1738033601438.png

1738036096737.png

Ref: Table: Specs from all 444 variants
1738034169611.png

Now let's see if they fit the Vmax lugs properly.... 🤞
 
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