S10 ES rear shock Racetech SRSP 6022 series direct replacement spring!!!!

[Rodge]

Both change on the forks, Jeff. You will notice that both forks have the adjusters on the fork caps and all compression damping is done on the left fork and rebound is done with the right fork. Good question as to whether they both change on the shock, though. I'll see if I can find anything in the Yamaha tech info available to dealers.

Any info would be very welcome, thanks.

 

[fredz43]

Any info would be very welcome, thanks.

Per these 2 pages of the 2014 Service Guide, it looks like it only adjusts rebound damping on the ES shock (in addition to preload).

 

[Rodge]

So no adjustable rear compression damping and no adjustable front springs preload?
Will inquire with Racetech about a gold valve in the compression leg only...
That will maybe be next winter project... for now going to enjoy this setup.

 

[WJBertrand]

Hey Rodge just wanted to check and make sure you used a 550lb/in rate when you did your calculations, not 500lb/in. Thanks.


-Jeff

 

[Rodge]

Hey Rodge just wanted to check and make sure you used a 550lb/in rate when you did your calculations, not 500lb/in. Thanks.


-Jeff

Hi Jeff,
Correct, here are the #'s compared to a 550 lbs/in spring.
Rodge's setup
Rider weight 250 lbs ready to ride
SRSP 6022085 476 lbs/in
All measures with luggage on (empty cases) , tools + 2 gallons of fuel (Rotopax) + Full fuel
Static = 35mm
1up = 75mm
1up plus luggage = 65mm
2up = 55mm
2up plus luggage = 42mm
466 lbs/in shock initial preload 1 pax
672 lbs/in shock preload max.

Karl's setup
Rider weight ready to ride= 250lbs
550 lbs/in + spacer
Bike setup, fuel but no luggage
1up = 70mm
1up plus luggage = 65mm
2up = 56mm
2up plus luggage = 52mm
355 lbs/in shock initial preload 1 pax
593 lbs/in shock preload max.

I estimate my luggage at 40lbs, my sag #'s would have been a little bit less if removed.
Cheers

 

[WJBertrand]

Hi Jeff,
As a matter of fact I used your inputs in Karl's tread to help me make my decision since we're the same weight.
I made the decision to use spring preloading in order to correct my sag issue, the RT spring installed length preloads the shock seat at 466lbs at single passenger setting, stock preloads it at 462 lbs at 2 passengers + luggage setting.
Your setup preloads the shock at 346lbs single passenger setting.
If I had use Karl's setup, I would have an additional spacer made on top to install a 8" 450 or 500 lbs spring, the top spacer would have been tick enough to preload the shock seat at around 450lbs single passenger setting.
I liked the stock spring rate but it is obvious that it is designed for the mass market human factors, so I choose around 50lbs more than stock.
I did not have the chance to measure sag, but I guess it's in between 40 and 50mm, I'll do it this weekend when I have some friends around to help me out.
Here are some footnotes
Cheers

I was just looking at your numbers again and did some calculation of my own regarding the preload at the single rider setting.

For the OEM the free length of the spring is 8.4" and the installed length is 7.75" per the information in the service manual. For the 428Lb/in rate of the OEM spring that results in a seat pressure of about 278lbs. This is much lower than the value you get of 462lbs.

The free length of the Summit Eibach 550lb/in spring is 8.0" but we add the 10mm (0.39") to it's free length to make it effectively 8.39" free length. Again the installed length is 7.75" so that results in a seat pressure of about 352 lbs at the one up no luggage setting. About a 26% increase in preload to OEM.

The above assumes that the 7.75" installed length is at the lowest preload setting. Do you know what the difference in mm preload is among the settings?

 

[diehli]

I was just looking at your numbers again and did some calculation of my own regarding the preload at the single rider setting.

For the OEM the free length of the spring is 8.4" and the installed length is 7.75" per the information in the service manual. For the 428Lb/in rate of the OEM spring that results in a seat pressure of about 278lbs. This is much lower than the value you get of 462lbs.

The free length of the Summit Eibach 550lb/in spring is 8.0" but we add the 10mm (0.39") to it's free length to make it effectively 8.39" free length. Again the installed length is 7.75" so that results in a seat pressure of about 352 lbs at the one up no luggage setting. About a 26% increase in preload to OEM.

The above assumes that the 7.75" installed length is at the lowest preload setting. Do you know what the difference in mm preload is among the settings?

If you look at his chart, he has that information in there. Basically he chose a rate to get him to the 2-up + luggage setting of the OE spring pressure/weight at the single passenger setting with the new spring.

http://www.yamahasupertenere.com/index.php?action=dlattach;topic=19121.0;attach=35871

 

[WJBertrand]

Ah, thanks missed that.
Looks like our numbers agree. Still wonder how far the preload piston moves between settings though. I could be missing it but don't see that information in the spreadsheet.


-Jeff

 

[Rodge]

Ah, thanks missed that.
Looks like our numbers agree. Still wonder how far the preload piston moves between settings though. I could be missing it but don't see that information in the spreadsheet.


-Jeff

Hi Jeff,
I did not calculate it at all preload position, only used 0 mm for single passenger and 11 mm for 2 passengers + luggages, the 11 mm max preload movement was measured by Karl if I'm not mistaken.
***There is a detail that I realized after the facts is that the OEM spring free length is 8.41", however there is section of coil spring at the beginning of the winding not touching the next coil at both ends of the spring, (red arrow in picture). This in fact does reduce the seat preload, I don't know by how much but it is lower than what I posted, 278 lbs single passenger and 462 lbs 2 passengers + luggage.
Cheers

 

[WJBertrand]

I would assume they would consider the coil bound bits in the rating


-Jeff

 

[Ostion]

I got my shock spring from RT and had made arrangements to have it uninstalled/swapped at Delamo Motorsports in Long Beach, CA. When I showed up yesterday, they changed their mind, and very politely declined on tackling this job.
I have located a couple of shops that will swap the springs but they want the shock shipped to them, which means I (and a smarter friend, as this is above my comfort level) will have to take it off the bike.
Are you guys aware of any video or tutorial on the subject, anywhere in the web?

 

[Rodge]

Hi Ostion,
Doubt very much that there is a specific S10 ES removal/install video...
It can be done, not easy... but doable.
If I was to re do it, I would take the time to slack off the header so that it is loose enough to remove the shock bottom pivot bolts (attach it to the frame).
There is one bolt that has been installed with the head of the bolt towards the header collector, it won't slide out without moving the header a little bit, hence not able to remove the lower pivot mechanism, the removal of the lower pivot mechanism will make this a lot easier.
The shock itself will come out by the side, look at the pictures in the 2nd post, you will notice that I only disconnected the stepper motor connector and removed the 2 hydraulic line guards, I changed the spring with the unit resting on the footpeg.
Honestly, not a big big job, may look overwhelming but take your time and you'll be fine.
Good luck and get ready to enjoy you're new handling ES S10, I am big time...
Cheers

 

[Ostion]

Thanks Rodge, I will let you know how it goes.

 

[AVGeek]

Did you try Chaparral in San Bernadino or Bert's in Colton? They may be willing to do the swap...

 

[WJBertrand]

Not sure about my time this weekend, but I have the spring compressors and have pulled an ES shock before. I'm cheap too!

 

[Ostion]

Jeff, that is a very kind offer, as I am running out of options.
I have stuff going on this weekend and am not sure how many hours involves the whole job but I will adjust to any time you make yourself available for me, this weekend or next. Thank you.
You can advise via PM if you want.

 

[Ostion]

Did you try Chaparral in San Bernadino or Bert's in Colton? They may be willing to do the swap...

They don't have great reputation for their service dept, just mega huge dealers. I would prefer a small shop but I may have found a solution via one of the local inmates.
Thanks for the suggestion though.

 

[JRE]

Interesting thread. How much of a chore was it to remove the shock to replace the spring?

 

[regulator]

Maybe have RT do it? They did mine .

 

[WJBertrand]

Interesting thread. How much of a chore was it to remove the shock to replace the spring?

The hardest part is getting the shock out and back in, lots of wiggling and moving the swing arm up and down as you advance it out, a little like one of those cube puzzles. Changing the spring is pretty easy with the correct tools. When I did mine I probably did too much disassembly taking the pump out of it's housing and it was a bit fiddly getting the electrical lead and preload hose back into the grommet properly. In retrospect, I think I could have avoided that hassle.