Correct Linkages for Ohlins Shock

Message

mickt1964 · #1 Post by **mickt1964** » Sun Aug 05, 2012 5:17 pm

Just fitted today, my Mille swingarm and Ohlins Shock (AP8240) to my falco.

I have used the linkages from the Mille also - how can I confirm that I have the correct linkages and dogbone.

Just one final point the shock has been serviced and re-sprung for a falco by MCT, so would I be better to use the falco linkages if MCT have changed the spring weight.
I will need to confirm what weight spring they have used.

Mick

#2 Post by **mangocrazy** » Sun Aug 05, 2012 5:46 pm

Can I point Sir to this post in the Aprilia Technical section?

https://www.ridersite.com/viewtopic.php?t=9153

You will need to find out what weight spring they've used. Did you tell them that you were using Mille linkages with the shock when you sent it in for service? That's a fairly important detail...

mickt1964 · #3 Post by **mickt1964** » Sun Aug 05, 2012 7:25 pm

Hi Mango

I read your post and have gone and checked what shock etc I have

The shock I have is actually an AP8230 (not a 8240) - the spring that was fitted is stamped 1091-36-105-L511 which according to your post is the wrong spring.
(what do the spring figures mean?)

Yes I will need to contact MTC, they have not recorded on my invoice any info.
It was a year ago when the did this work

To use the falco linkages what spring rate would I be looking for and same for the RSV linkages

Mick

blinkey501 · #4 Post by **blinkey501** » Sun Aug 05, 2012 7:52 pm

mickt1964 wrote:Hi Mango

I read your post and have gone and checked what shock etc I have

The shock I have is actually an AP8230 (not a 8240) - the spring that was fitted is stamped 1091-36-105-L511 which according to your post is the wrong spring.
(what do the spring figures mean?)

Yes I will need to contact MTC, they have not recorded on my invoice any info.
It was a year ago when the did this work

To use the falco linkages what spring rate would I be looking for and same for the RSV linkages

Mick

Does the shock have ohlins racing around the bottom ring of the shock?

#5 Post by **mangocrazy** » Sun Aug 05, 2012 9:19 pm

mickt1964 wrote:Hi Mango

I read your post and have gone and checked what shock etc I have

The shock I have is actually an AP8230 (not a 8240) - the spring that was fitted is stamped 1091-36-105-L511 which according to your post is the wrong spring.
(what do the spring figures mean?)

Yes I will need to contact MTC, they have not recorded on my invoice any info.
It was a year ago when the did this work

To use the falco linkages what spring rate would I be looking for and same for the RSV linkages

Mick

This gets curiouser and curiouser.

The AP8230 shock was one of the early and comparatively rare Mille shocks that used the same linkages as the Falco. If you look at these linkages the triangles are virtually equilateral in size; i.e. the distance between bolt holes is very similar on all 3 sides. So this shock 'should' use standard Falco linkages, unless it's been revalved to suit the later Mille linkages.

The spring code you've given is non-standard for am AP8230 shock. It works out as follows:

Art N/mm Kg/mm lbs/inch
-36 105 10.70 600

standard spring for the AP8230 shock is as follows:

Art N/mm Kg/mm lbs/inch
-54 140 14.27 799

So the Ohlins spring you have is significantly lighter than the Ohlins original. Is the 1091-36-105-L511 spring the one that is currently fitted to the shock, or is it one that MCT have supplied? I'm guessing that it's one that MCT supplied, and it's not an Ohlins spring with the code printed on it...?

You really need to contact MCT and find out:

1. What is the spring rate.

2. What linkages was the shock valved for - early Mille/Falco or later Mille.

Only then can you work out what linkages you need to use.

If you're using early Mille/Falco linkages, the spring rate should be between 700-800 lb/ins, depending on your weight and preferences. I use a 700lb spring on mine, and I weigh around 11 stone wringing wet.

If you're using later Mille linkages, the spring rate should be between 485-540 lb/ins, depending on your weight and preferences.

I've always found that Ohlins fit overly-firm springs to their shocks, but that is just a personal opinion. Other people feel differently.

mickt1964 · #6 Post by **mickt1964** » Mon Aug 06, 2012 8:25 am

Hi Mango

The ohlins spring mentioned is not fitted to the shock - MCT took this off and replaced with one of their own as they had said the spring fitted was wrong
So as you say I need to find out the spring rate the MCT spring is.

Aladinsaneuk · #7 Post by **Aladinsaneuk** » Mon Aug 06, 2012 9:30 am

This is MC Technics in stowmarket?

if so, I am pretty confident that it is correct - Darren, the main man there is very highly regarded for his work and does, I bel;ieve still do most of the suspension set ups for the magazines and assorted BSB teams....

I had a chat with him some time ago with regard to mille shocks on a falco before he started work on my set up, there was all sorts of things done like weights etc, before he fitted stuff - one of the most instant bang for bucks upgrades I have ever done on the falco - the handling is far better than anything I can do!

mickt1964 · #8 Post by **mickt1964** » Mon Aug 06, 2012 11:01 am

All sorted

Yes the spring that was fitted (ohlins) was the not the correct spring.

The shock was serviced and spring fitted to suit my weight and to use falco linkages.
Spring I have is 1095-49 which is a 742lb spring, bang in the middle of what you said mango.
I should also be looking 10mm static sag.

Cheers all

#9 Post by **mangocrazy** » Mon Aug 06, 2012 6:34 pm

Good stuff. That sounds bang on.

mickt1964 · #10 Post by **mickt1964** » Mon Aug 06, 2012 9:03 pm

Yes it was MCT in stowmarket.

I had this done a while ago at the same time as having my RS250 suspension sorted, which I have just finished restoring.
Hence the Falco's turn to have a make-over.
Saying that I have had the Falco's forks done at Reactive
The reason I used MTC for the RS was that Darren was the only company that could service and rebuild RS Sachs shock, everyone else said it couldn't be done.

Thanks all