1098 Showa Fork Oil Level

Hi all

Could somebody confirm the oil level for a pair of Showa 1098 forks please.
I think it's @135mm, but don't know where I got that from.

Thanks

 

Thanks WCP.

The 115mm gap is for the Ohlins forks fitted to the 1098S, not the pauper spec Showas.
I need to work with air gap on these Showas, but like me you've found the air gap isn't mentioned in any manuals.

I agree Oldtech, I've always rather worked with airgap, but made myself a replica of the proper tool using stuff I had in the garage.





I made a compressor at the same time and it's been invaluable.

 

Thanks Guys

Unfortunately in my usual way I've done things the hard way and built a hybrid set of Showa Radial Caliper forks for my old M1000 using mostly bits from a 1098 pair and some ST2 parts, so using the air gap will most likely get me nearer a 1098 standard starting point than just chucking 511ml of oil in.
That probably needs a little explanation, give me 10 and I'll post some pics etc

 

I love my old M1000, and want to treat it to a better front end.
I've already upgraded it to Adjustable Showa forks from an ST4 but want to go Radial Calipers and got hold of a set of 1098 forks.
It also gave me the opportunity to do an experiment which I got the seed of when doing my 999 project.

There are a couple of issues with using Superbike forks in an old M1000 of course.
Firstly the forks are a little too long, but like the ST4 ones all I need to do is drop the yokes down over them @10-15mm.

The much bigger issue is that the M1000 has 50/54mm yokes, and the 1098 forks are 53/53mm.

I could of course have bored out the top yoke and shimmed the bottom yoke, but I wasn't happy with the thickness of the remaining wall of the top yoke.
I could have machined up a complete new top yoke, but I want the whole thing to look OEM

I am lucky enough to have a whole load of parts around me, left over from old projects and purchased as job lots when I wanted something else.

 

So I started with the 1098 forks, a pair of ST2 outers which are the same length as the 1098 ones, and some ST2 adjustable end caps.

The ST2 and 1098 Forks both have 43mm Stanchions, so that's easy.





The 1098 forks use a different (better/later) damper etc adjustment:



Unfortunately the 1098 cap won't fit the ST2 Tubes as it's too big in diameter.

But, all the 'Gubbins' from the 1098 Cap fit the outer part of the ST2 end cap:









Which then fits the ST2 Outers:



I did have to use the ST2 Sliding bushes, but have ended up with a pair of Radial Calliper Showa forks with the 1098 internals that fit 50/54mm Yokes.



But of course the internal volume of Oil may be different, so I'd rather use the level than amount.

I haven't tried them yet, but I don't see why they won't work.
I have a pair of 999 Master cylinders to fit at the same time to replicate the brake setup on my 999 which appears to work well.

 

To be honest I've no idea, they were just the cheapest but decent condition ones I could find on EBAY.

Although the ones I brought from Android853sp to put in my 999 are also Black:

 

Andy hi.

Once again I've learnt something, I thought all 1098Ss had Ohlins Forks.

So I wonder if the 115mm gap mentioned above is relevant?
Everything I've found says 115mm for the Ohlins forks.