Hi - not before time I've finally brought a Ducati 900SS into my life, although I've yet to bring it back to life as it's a non-starter. That's an issue for another time - I've too many projects on as it is - but in the meantime I've been offered a set of forks and yokes from an ST2 (not sure what year). Since the chrome on my forks is a little pitted I'm wondering if these forks will fit. What little information I can find on the 'net suggests they won't. Anybody know what forks, if any, match a '92 900SS. Cheers, Andy.
Measure the diameters at the yokes top and bottom and check against the ST2 forks....Also check the length of fork from centre of axle to top of fork where the cap joins the shroud..... And check the axle diameter and fitting..... And check the caliper lug bolt spacing.... There's a start. But if your forks are only slightly pitted, they should clean up OK with a bit of fine wet and dry, wire wool, and lots of polishing......After all if it is a 92 SS, they should be fully adjustable Showas which are worth keeping. AL
They'll fit your ss yokes for sure, but they're a good bit shorter and as Arquebus says wheel spindle is different as are brake calipers, maybe better to get OE re-chromed.
Well, I only know about Ess-ess stuff.......What's an ST2 anyway?:wink: Still, if he fits the ST2 forks he won't have any trouble reaching the ground, but hell, it will handle all wibbly-wobbly at slow speed, and he will find himself with mucky pants, because it will drop into corners just like that......my Showas are about 8mm too much through the yokes and I constantly find I have to lift up rapidly when I chuck it into a bend. AL
St yokes will not fit an SsPm lmola he has done this swap Monster forks of the same era fit -yokes have diferrent offsetSteve B
I think length is same, diameter definately is. Later ST2 forks will have 25mm axle and 65mm caliper mounts. Your SS has 40mm calipers and possibly 17mm axle? I think SS and ST offset is same, Monster is smaller. Steering stem is bigger on later ST2 not sure about earlier.
And if you upgrade to the larger carby SS axle, the next thing you will find is you have to change the speedo drive, and because of that, you need to change to the later carby SS wheel. AL
St2 st4 forks will fit a ss carb but not a ie unless you want to fit the clipons above the top yoke. SSie forks are longer by 45mm. St2 st4 yokes will not fit from any model. The later st2 st4 ss 748 916 front wheels are much lighter than the early ss 851 888 wheel. The later showa 65mm caliper mount 25mm spindle forks are much better than the old showa type which also opens up your choice on calipers. You will need a new speedo drive as Al has stated but they come up cheaper than ss old type as they are fitted to lots of 25mm spindle dukes. Reducing the wheel weight makes for better handling
But the later SS speedo drive from a carby SS will not fit the earlier carby SS wheel, so he will have to change the wheel (and drive seal) as well...... AL
Just found some old dd racing notes on forks.. Fork lengths Ssie all 740mm Monster all ie models plus st2 st4 and later m600 695mm 600 750 900ss Carby 725mm Monster carby early 725mm All measurements are from Skids who has forgotten more than i know about dukes.
Well thanks for all that info - you've made my mind up. I'll stick with the forks I've got and clean up the chrome. The ST2 is about to be broken but I'll let the guy know I'm not interested any more. Cheers once again.
I'd be suspect about some of those sizes, as I fitted St2 adjustable forks to my 620 monster and they were defo shorter. Went from about 22mm above the yoke to almost flat, and I didnt do it, was done by a pro who measured all the geometry to make sure nothing changed.
At the moment, I can't recall the sizes, but just in case your fork seals start to leak because of the pitting, I managed to get some very slightly oversize seals for my Marzocchis (don't leak now) and I'm sure I spotted some for the Showas. AL
I found hardly any difference in weight between carby 3 spoke brembos and ie 3 spokers? (fronts, haven't compared rears)
With front wheels, the later carby SS Brembo wheel should be slightly lighter than the early carby SS Brembo wheel.........there is less 'meat' in the speedo side of the hub......... Won't make much difference to an assembled wheel, though, because the larger axle is obviously a bit heavier than the earlier 17mm one, although saying that, there is less meat in the larger ID spacer and bearings. AL
