Best forks to swap on my S2R 800?

[Kato]

Read again Darren, I was suggesting rebuild existing rather than through money at it

[slob]

the sliding pin calipers on s2r800, coupled with 300mm discs, aren’t great compared with goldline/320mm discs, but they’re adequate and a world apart from the wooden things we used to get on 70s/80s jap bikes.

the secret of ebay upgrades is don’t be in a hurry and wait for what you’re looking for to come along at the right price. as kato says: if it says ‘aprilia’ rather than ‘ducati’ you’ll probably get the same kit at half the price.

[Kato]

Best solution so far seems to be the Andreani Miasano

[Kato]

Originally Posted by slob

a world apart from the wooden things we used to get on 70s/80s jap bikes.

I remember those Rob grab a handfull of brake and hope /wish /pray that today they work properly

[Darren69]

Originally Posted by Kato

Read again Darren, I was suggesting rebuild existing rather than through money at it

I know, I was over simplifying i know, but it does'nt seem to be the wrong answer per se just not the right answer within an unspecified limited budget. I know the Andreani kit is supposed to be real good but at 600 I'm just offering the guy a chance to get some nice S4R forks for reasonable amount; what he does with them after that is up to him but Andreani wb my recomend.

[Nickj]

Originally Posted by Kato

I remember those Rob grab a handfull of brake and hope /wish /pray that today they work properly

On the positive side the lack of friction meant the disks lasted for ever. Honda 500/4's had the disk made out of never rust or wear material. I was seriously wiped out by a car in pompey with the front end was a pile of bits barely attached to the rest of the bike, what remained of the front end was fixed to the car by the disc that had gone halfway through the B pillar. Honestly the disc didn't look bent or scratched.
That one did hurt a bit

[Nickj]

Originally Posted by Darren69

I know, I was over simplifying i know, but it does'nt seem to be the wrong answer per se just not the right answer within an unspecified limited budget. I know the Andreani kit is supposed to be real good but at 600 I'm just offering the guy a chance to get some nice S4R forks for reasonable amount; what he does with them after that is up to him but Andreani wb my recomend.

Too simple but the caliper mounts on the sliders do come off, whats the size difference? I seem to remember the diameters are different.

[Dave G]

OE discs were 300mm with no offset, a matching set of goldlines and 320mm/10mm offset discs will bolt straight on. 65mm spacing for the caliper bolts
Aprilia calipers and discs could be used, colour being the main difference.

[yourguitarhero]

Thanks for all this info, lots to take in!

Main issue with my forks is constant weeping from seals that can't seem to be fixed.

Figured it would be easier to replace the forks with other second hand ones, and if they have some adjustability/ better performance then that would be nice! Hence my interest in the s4r ones ��

[slob]

iIf the chrome on the legs is scratched or very worn, you’ll never stop them leaking.
s4r forks should be a straight swap but will likely be oversprung for the average rider, since s4r is about 20kg heavier than s2r.
The adjustability on the showas isn’t great though.

[Mr Gazza]

M900Sie, M1000Sie or S2R1000 forks should be more in the ball park for spring rate.
I have 95Nm springs in my M900Sie apparently and they work fine.

MCT put EXP 15 fork oil in at the major service. Darren said that would give the damping mechanism something to work with. I've been able to adjust them a few clicks to get them sweet since then. No complaints, even on the Norfolk/Suffolk B roads I frequent, the Fens are in a different league of pot holes though!!

Nothing you going to be able to buy second hand is going to be perfect out of the box.
It'll pay to have them serviced from the word go and go from there.

https://www.mctsuspension.uk/ Showa service with new seals and oil approx £150.

[Darren69]

It maybe true 'cos the S4 bikes are 20kg or so heavier than the M1000 or S2 but I don't know if they were resprung because of this. I couldn't say and the adjustment is a bit crude but it does work and unless you can ante up for the Andreani kit or Maxton job then that's the best you can expect from them and they're ok tbh just dont expect to feel the difference of every click.

[Dukedesmo]

Originally Posted by Mr Gazza

M900Sie, M1000Sie or S2R1000 forks should be more in the ball park for spring rate.
I have 95Nm springs in my M900Sie apparently and they work fine.

I'm surprised if they are 95n?

I have 916 Showa forks in my M900 and when I fitted them they had 95n springs but were way too hard, I swapped them for 90 and they are now much much better and I'll wager I'm a fair bit heavier than you.

That said, different forks/valving etc. may make the difference?

To reply to the OP, I can testify that 916 forks work very well and are adjustable etc. but are not a straight swap as the tubes are a different size to a Monster (at least old Monster) meaning, you need to bore the top yoke and shim the bottom.

[Mr Gazza]

Oops! Sorry it's the rear Ohlins that has a 95nm spring.
I misread MCT's report. It just says "std" for the fork springs, so I'm non the wiser.

[yourguitarhero]

Well, took me a little while to sort this out as I was away in Europe doing the TET for a month.
Darren69 sorted me out with some S4R forks and I got hold of some nicer calipers and disks from eBay.
Got round to fitting them today after lashing up a way to get the front off the ground using a trolley jack, bits of wood and some eyebolts in the garage roof and ratchet straps.



It's taken me that long to do it that the battery is flat, the MOT is out and the bike is SORN so I have a wee bit to sort out before I can test ride them.

It looks good to me so far