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Old March 18th, 2014, 03:39 AM   #41
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I don't seem to get the dive on front suspension that you all complain about.
I think the low version must have stiffer front springs, even on the track day braking really hard I never noticed it. The shorter travel must have something to do with it, Less air gap, different spring rate???
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Old March 18th, 2014, 04:42 AM   #42
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Plus back is lowered. wouldn't that shift CG? It's possible stock height has weight more forward/up.
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Old March 18th, 2014, 04:52 AM   #43
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I never experienced excessive dive on mine, just overall harshness and twitchyness (is that even a word?)
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Old March 18th, 2014, 06:53 AM   #44
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Originally Posted by twozzie View Post
(Disclaimer, I have no idea about suspension nomenclature or any affiliation to the companies below. This is just some feedback on my experience)

Finally took the bike to Evolution Suspension in San Jose, CA. I spoke in depth to Rob the owner about the issue with the forks and availability of the Andreani. I also spoke to David at Fastbike about the Andreani's and what needs to be done to get them fitted.
After 2 days Rob had reworked the existing forks as the best solution for me (I dont like to bugger about with the suspension). Upgraded springs, repacked shims, new oil, new valves or whatever (he has some pictures I will add showing the old and the new).
He said the old forks had way too soft springs (I'm 165lb inc gear) and Ducati had packed them down to make them stiffer. he also said the holes to let the oil flow were way too small so when the fork compressed, it didn't really do much as the oil had no where to go and so the force came through the handlebars. He also said that with not too much cost increase, the valves could be changed to let the suspension do what it was suppose to do and no idea why Ducati didn't do / hasn't done this.
I took the bike for a quick ride, aimed for potholes and train tracks and the bike was super compliant, most, if not all of the "grainy, harsh feedback had gone" only issue was it did rise up once and hit me on the butt but that may have been over agressive riding over the train tracks. I'll collect the bike this week and give it a full test ride this weekend. Rob can tweak as necessary after my ride.

I'll keep ya posted
Sounds like you got the same results as I did. It's always nice to have your experiences and opinions validated. Could you ask Rob what spring rate he came up with? Pathetic that the stockers could not handle even a flyweight like you! (He said with a hint of jealousy).

Racetech told me that they measured the stock rate at 0.63 mm/kg.
They chose 0.85 for my 180 pounds in gear, same as they recommend for most middleweight sport bikes.
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Old March 18th, 2014, 07:47 AM   #45
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Did they open the valve port to allow more fluid to flow, as well? You mentioned the tech spoke of it but didn't say if they resized.
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Old March 19th, 2014, 01:47 PM   #46
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I asked Rob what was done and as the forks do different operations as you know, he put a 9mm/kg in one side and a 8. something in the other, (no idea which) overall he went to 8.75.
I've attached his picture of the valves/Piston, NEW on the left, OLD on the right. You can clearly see the holes are no where near big enough to flow the oil on damping.



First ride on the freeway it felt a little squirrelly but the roads are crap anyway. This weekend I'll run my regular route and see what gives. Rob was concerned about brake dive but so far this is not an issue.
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Old March 21st, 2014, 12:13 PM   #47
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I asked Rob what was done and as the forks do different operations as you know...
Twozzie, actually the RHS does all the damping and the LHS does nothing. But those spring rates (the units should be kg/mm) sound just about right. Nice to hear someone else has done more or less the same as I did. I think you'll be pleased.

Could be worse - the YSR50 I once raced only had a spring in one side!
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Old March 23rd, 2014, 04:52 AM   #48
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Quote:
Originally Posted by mentalist View Post
I don't seem to get the dive on front suspension that you all complain about.
I think the low version must have stiffer front springs, even on the track day braking really hard I never noticed it. The shorter travel must have something to do with it, Less air gap, different spring rate???
Like yours Mentalist, my Low version does not seem to have excessive dive under brakes, but it was twitchy under hard acceleration, a characteristic well controlled with the addition of a steering damper.
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Old March 23rd, 2014, 08:17 AM   #49
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What is everyone running for their air chamber / oil levels? Andreani called for 140mm. I set it there and the fork would bottom to easily. So I bumped it up 20ml once; better but still bottomed. Bumped it up again by 20ml, and it's better…but will still bottom. I don't want to put too much in though…

(sorry if you've seen this twice, I did post on Ducati.ms)
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Old March 24th, 2014, 07:10 AM   #50
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What is everyone running for their air chamber / oil levels? Andreani called for 140mm. I set it there and the fork would bottom to easily. So I bumped it up 20ml once; better but still bottomed. Bumped it up again by 20ml, and it's better…but will still bottom. I don't want to put too much in though…

(sorry if you've seen this twice, I did post on Ducati.ms)
Can't you get the spring rate from Andreani? That's got to be right first. If it's less than 0.80 kg/mm or so you will need stiffer springs. They aren't all that expensive. If you are really heavy you'll need more like 0.95 kg/mm.

Since your cartridges are completely different from stock, my numbers will not necessarily apply. But RT set my oil level at 110mm. Preload is only 10mm. And I have been checking sag & travel with a ziptie, it's still at least 30mm from bottoming.
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