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General Category >> Rubber Side Down! >> Rear shocks
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Message started by Bob Scogin on 09/22/23 at 14:26:32

Title: Rear shocks
Post by Bob Scogin on 09/22/23 at 14:26:32

Sources for a relatively inexpensive 11.5"-12.00" inch rear shock?

Title: Re: Rear shocks
Post by TheSneeze on 09/22/23 at 15:18:58

RFY's are 12.5" long.

Title: Re: Rear shocks
Post by verslagen1 on 09/22/23 at 17:12:44

used intruder shocks are a tad over 12" but are the perfect spring rate IMHO.

Title: Re: Rear shocks
Post by justin_o_guy2 on 09/23/23 at 06:24:31

Does the size of the rider affect choice of spring Rate? It would matter with respect to spring ,what? Rating? How much it takes to compress it is one thing, and I just don't understand the difference. Okay, I don't understand how they work together. How would a guy know what spring he wanted if he had a big table of springs with their rating for
How much it takes to compress them
And then the Rate?
Is there a Readers Digest technical level explanation somewhere?
If you don't want to mess with it, that's okay. I'm just wishing I had a better understanding about it, it's not like I'm going to have to shop for The Right shocks .

Title: Re: Rear shocks
Post by verslagen1 on 09/23/23 at 08:02:22

there probably is, I just know that for my big but the intruder shocks are perfect for the savage.

you could probably gleam some info on suspensions from the tech thread by Gary in NJ.

Title: Re: Rear shocks
Post by justin_o_guy2 on 09/23/23 at 08:41:17

Okay, thanks..

So riders ask

Do these springs make my butt look big?

Ohh,you mean the 1/2" diameter coil?

Umm,No,no,not at All..

Title: Re: Rear shocks
Post by Ruttly on 09/23/23 at 09:37:57

Oh I thought they were you saddlebags !

Title: Re: Rear shocks
Post by justin_o_guy2 on 09/23/23 at 10:35:58

Ruttly!

Title: Re: Rear shocks
Post by Bob Scogin on 09/23/23 at 14:44:43

I unearthed a pair of stock 11.5" shocks I had off of my '92 Sportster. No go. The eye's are too wide, and the bushing sleeve ID is .500 vs 14 MM on the S40. The rubber bushings are bonded to the sleeve, making modifications difficult. So, back on the shelf they go and still considering my options.

Title: Re: Rear shocks
Post by verslagen1 on 09/23/23 at 16:51:19

5D505D4C5C505856513F0 wrote:

easy fix, 1/2 OD tubing with .020 wall. cut to length and insert.

Title: Re: Rear shocks
Post by Bob Scogin on 09/23/23 at 18:01:27

"easy fix, 1/2 OD tubing with .020 wall. cut to length and insert."

Maybe I wasn't clear. The S40 shock eye sleeve is 14MM (.551") ID and the Sportster sleeve ID is .500". I need a larger diameter ID, not smaller. The .500" sleeves could easily be drilled to 14MM as the wall is thick enough, but they're bonded to the rubber bushing and don't come out, so I can't chuck them in my lathe or hold them in a drill vice.

Title: Re: Rear shocks
Post by verslagen1 on 09/23/23 at 21:27:49

I'll have to locate them and check, but that's what I did.

Title: Re: Rear shocks
Post by verslagen1 on 09/24/23 at 11:08:59

I replaced my rear shocks with progressive 412-4005
They have an ID of 16mm
And the stock bolt is 14mm
I had available to me steel tubing 5/8" ID x .035 wall
They fit tightly and work great.

The 412's at 11" have more travel than stock shock but I had to use the 5th pretravel setting so I bought a set of 440-1022 and can use the lowest preset. They are good.

Beast has a set of intruder shocks and I like them best of all.

Title: Re: Rear shocks
Post by Mavigogun on 09/24/23 at 12:03:02

544750514E4345474C13220 wrote:

used intruder shocks are a tad over 12" but are the perfect spring rate IMHO.

That's what I swapped mine with- that, and taller rear rubber.

Title: Re: Rear shocks
Post by Bob Scogin on 09/24/23 at 17:57:55

"That's what I swapped mine with- that, and taller rear rubber."

I laced up an 18 for the rear and fitted a 120/80-18 to get the rear up some. I'm looking for slightly longer shocks to reduce the steering head angle a bit more. I like the bike, but it's one of the slowest steering that I've ever ridden.

Title: Re: Rear shocks
Post by zipidachimp on 09/27/23 at 19:57:44

I used the 12.5" sportster shocks. Cut a thin wall tube in half lengthwise, slip the eyes over the stems, tap the cut tubing into the extra space as a shim, trim to length, screw them down, problem solved !
Cheers! 8-)

Title: Re: Rear shocks
Post by Mike D T on 10/16/23 at 19:22:48

I bought some Drag Specialties 12.5" shocks. They have 16mm ID bushings which are not easily removable. I will try Verslagen1's 5/8/ inch, .035 wall pipe solution, as that seems like it would fit well. 5/8 being a hair under 16mm and minus the .070 walls resulting in an ID of just a hair over 14mm.

I also like zipidachimp's cut pipe solution if all else fails, or until I can find the perfect 5/8 pipe ;-)

Thanks for the ideas!