Sachs yellow spring with Falco Linkages

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gazuk · #1 Post by **gazuk** » Mon Apr 23, 2007 8:56 am

Ok, lets get this issue out into the open, as it now seems to appear in about 80% of the posts.

Could the people who have fitted a Sachs yellow spring onto Falco Linkages please step forward with the following:

- Was it a good mod
- What is your weight
- Apart from sag, did you mess with the other adjustments much

I totally understand that using the mille linkages is the correct way to go, but as we all know, these are getting rare. But on the other hand, the white spring shock is getting old and is equally as rare. It may not be a perfect solution, but low mileage yellow spring shocks can be picked up for 50 quid, so it is a cheap mod. Whereas, if I got a white spring one I would get it rebuilt with new schrader valve, which would be 3 times the cost.

I just fitted mine yesterday. Haven't ridden it yet or checked the sag, but it does appear to be very bouncy. I weight 16.5 stone.

D-Rider · #2 Post by **D-Rider** » Mon Apr 23, 2007 10:13 am

Sorry - can't answer your questions as I haven't tried the yellow spring with the standard linkage.

However, I can complicate the issue a bit further ......

The parts of the linkage that has greatest influence on matching spring rate & travel are the triangles.
Now the RSV triangles can still be bought new and are only about £14 a pair - so the thought comes to mind that a halfway-house solution of Falco dogbone with RSV triangles may be better than Falco triangles and dogbone - when working with the yellow-spring RSV shock. However, I've no experience of this either and can't comment on how good or bad it would be.
Personally I'd prefer to go for the full set of RSV linkages .... but as the RSV dogbone costs about £95 (new), I can understand why people may not want to spend that much.

New Linkages

BTW ..... Did you know that there are 2 types of RSV triangles for the Yellow-spring shock? They both have the same geometry but there is a set made out of 6mm thick aluminium and a set made of 4mm thick steel.
I found this out when I obtained a set off ebay to replace the set I'd bent when my shock came loose. My first set were the Aluminium ones, the ones I obtained as replacements were steel.

I've actually got a set of new triangles on order to fix my original linkages .... so eventually I may have a complete spare set for some lucky person .... I'll let you know when I get hold of them (so hold off on your excitement until I actually confirm I've got them).

gazuk · #3 Post by **gazuk** » Mon Apr 23, 2007 10:20 am

First dibs on them if tey become available please Mr D-Rider. You can add the cost to my tab

gazuk · #4 Post by **gazuk** » Mon Apr 23, 2007 10:25 am

Another shock question - How you alter the ride hight. The Mille manual says 'moderately loosen lock nut (5). Adjust the shock absorber length'. Doesn't say how to adjust length - remove shock from bike or twist while still in place.

gazuk · #5 Post by **gazuk** » Mon Apr 23, 2007 10:41 am

will these fit

http://cgi.ebay.co.uk/APRILIA-TUONO-RSV ... dZViewItem

sabestian · #6 Post by **sabestian** » Mon Apr 23, 2007 11:09 am

gazuk wrote:will these fit

http://cgi.ebay.co.uk/APRILIA-TUONO-RSV ... dZViewItem

No, they won't fit. At all. Not unless you go for Falcuono or Fighter conversion.

Honestly - I was hoping no one notices this auction...

Yeah, they should fit. In fact I've got Tuono yella spring shock on the way.

Now the bad news: I'm "diatrybauk" (the only bidder so far).

So... c'mon Gazuk, show me what you've got!!!

gazuk · #7 Post by **gazuk** » Mon Apr 23, 2007 11:24 am

If thats the case then I'll let you have em. Bit silly to bite the hands that feed ya. I get loads of info from this site and contribute basically bugger all, don't seem right to queue jump.

I don't like to advertise ebay stuff I'm interested in, but in the case of linkages, I guess it's best to make sure they're the right ones.

Fausto · #8 Post by **Fausto** » Mon Apr 23, 2007 11:52 am

sabestian wrote:
gazuk wrote:will these fit

http://cgi.ebay.co.uk/APRILIA-TUONO-RSV ... dZViewItem
No, they won't fit. At all. Not unless you go for Falcuono or Fighter conversion.

Honestly - I was hoping no one notices this auction...

Yeah, they should fit. In fact I've got Tuono yella spring shock on the way.

Now the bad news: I'm "diatrybauk" (the only bidder so far).

So... c'mon Gazuk, show me what you've got!!!

.........and I am 200ntr

No - only kidding

But I don't understand why you bid so early? I thought the trick was to pounce at the last second. Don't worry I am not after this one.

HowardQ · #9 Post by **HowardQ** » Mon Apr 23, 2007 11:57 am

Gaz,
As covered on the other thread, if you can't get the linkages you can always change the spring, which shouldn't cost too much. My guess is that at your weight the yellow spring will be too soft, but see how it goes first.
Another advantage of the white spring shock over the falco blue spring is that it is sllightly stiffer, as most over us on this site are a bit above average weight, (with some exceptions like Falcomunky).
I know that white spring is slighly stiffer than the blue, but do not know the figure for the yellow spring, anybody have the details?
My finger in the air guess would be that at your weight with these linkages, you may wan't to be about 25% stiffer.
If the linkages were the same somebody on the site had a way of working it out for people above average weight. The different linkages make it more complicated though.
Otherwise I would try DRs idea of changing the triangles.
never tried a yellow spring so can't say, my info. on this just comes from what I have picked up from various sites.
All I can say is that at just over 15st the white spring shock is fine for me.

D-Rider · #10 Post by **D-Rider** » Mon Apr 23, 2007 12:08 pm

gazuk wrote:will these fit

http://cgi.ebay.co.uk/APRILIA-TUONO-RSV ... dZViewItem

Yes but they won't help as they are the same as the Falco ones.

Despite what the advert says, those pictured are for a White spring shock.

Falco / White spring: fairly Equilateral Triangles
Yellow Spring: fairly Isosceles Triangles

sabestian · #11 Post by **sabestian** » Mon Apr 23, 2007 12:14 pm

D-Rider wrote: Yes but they won't help as they are the same as the Falco ones.

Despite what the advert says, those pictured are for a White spring shock.

Falco / White spring: fairly Equilateral Triangles
Yellow Spring: fairly Isosceles Triangles

Cr@p. I'll try to retract my bid. Thanks, D!

Can you replace the yellow spring with the blue one from a stocker?

If you replace plates and leave the dogbone, how will it affect the ride hight?

sabestian · #12 Post by **sabestian** » Mon Apr 23, 2007 1:02 pm

THE difference (after Go_modem_go from the other forum.)
The links attached to a Falco shock are - yes - the Falco links.
Linky

D-Rider · #13 Post by **D-Rider** » Mon Apr 23, 2007 3:01 pm

sabestian wrote: Cr@p. I'll try to retract my bid. Thanks, D!

Can you replace the yellow spring with the blue one from a stocker?

If you replace plates and leave the dogbone, how will it affect the ride hight?

I don't know how different the spring rates are between the blue and yellow springs - or whether there is a significant difference in spring length.
I guess the damping rates are matched to the spring rate - but if within the limits of damping adjustment, this shouldn't be a problem - after all, suspension specialists will match the spring to the rider's weight.
So, basically, I don't know! (but I can understand why it may or may not work).

As for the effect of using the shorter Falco dogbone - this should pull the back of the bike up - increasing rear ride height.

sabestian · #14 Post by **sabestian** » Mon Apr 23, 2007 7:12 pm

So, theoretically, if we fit the yellow spring shock with Mille triangles and Falco dogbone, after lowering the hight adjustment on a shock we should get something around stock Falco hight (or slightly higher). Which is all good.

Vincent · #15 Post by **Vincent** » Wed Apr 25, 2007 8:05 am

I understand I think

me