Main Menu

Spring calculation help for a loveable fat man

Started by Michael, November 04, 2009, 11:54:10 AM

Previous topic - Next topic
Print
Go Down Pages 1 ... 3 4 5 6
User actions

ducpainter

#60
November 23, 2009, 04:43:45 PM
Quote from: Michael on November 23, 2009, 04:36:41 PM
Angelina Jolie.




You have a very strange picture of a 'lovable fat man'....
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Michael

#61
November 24, 2009, 07:08:17 AM
Quote from: ducpainter on November 23, 2009, 04:43:45 PM
You have a very strange picture of a 'lovable fat man'....

Hey, if you can't love a face like that, I don't know what to tell you.  [coffee]

Michael

#62
November 26, 2009, 10:00:45 PM
So in my quest to redo my video, I've decided to take Howie's advice and see if I can't remove the spring with the tire on. As it turns out, he's right -- you don't have to remove the tire at all. I also didn't need to remove the exhaust pipe.

So, I'm re-doing the video to show the much easier way.

Changing the rear spring is really a lot easier than I thought ... or at least it would be if I hadn't done it the wrong way first and if I wasn't making a video about it.

[thumbsup]

Michael

#64
December 22, 2009, 11:36:13 AM
So I ordered the front springs:

FRSP S3534100 RT FRK SPR 34.7x340mm 1.0kg $109.99
Inner Fork Bushings (pair) FMBI 41201 P $24.99
Outer Fork Bushings (pair) FMBO 41202 P $21.98
Fork Seals (pair) FSOS 41 P $21.98
Dust Seals (pair) FSDS 41 P $19.98

They'll be here next week.

[coffee]

ducpainter

#65
December 22, 2009, 01:23:57 PM
Quote from: Michael on December 22, 2009, 11:36:13 AM
So I ordered the front springs:

FRSP S3534100 RT FRK SPR 34.7x340mm 1.0kg $109.99
Inner Fork Bushings (pair) FMBI 41201 P $24.99
Outer Fork Bushings (pair) FMBO 41202 P $21.98
Fork Seals (pair) FSOS 41 P $21.98
Dust Seals (pair) FSDS 41 P $19.98

They'll be here next week.

[coffee]
No valves?
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Michael

#66
December 23, 2009, 10:26:17 AM
Quote from: ducpainter on December 22, 2009, 01:23:57 PM
No valves?

Do I need valves?

It's a non-adjustable fork. I don't know if that matters. Other than doing my rear spring, I have no experience with motorcycle suspension.

ducpainter

#67
December 23, 2009, 10:36:09 AM
Quote from: Michael on December 23, 2009, 10:26:17 AM
Do I need valves?

It's a non-adjustable fork. I don't know if that matters. Other than doing my rear spring, I have no experience with motorcycle suspension.
Race Tech makes a replacement valve for that fork.

The damping stack that they recommend is more for the track or smooth roads. It's pretty stiff.

I have the same bike as you with the gold valves in the front and it transforms the bike. The shim stack is not the one race tech recommends.

Contact eric at clubhouse motorsports and he can do the same for you.

http://ducatimonsterforum.org/index.php?topic=18933.0
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Michael

#68
December 23, 2009, 01:50:33 PM
Quote from: ducpainter on December 23, 2009, 10:36:09 AM
Race Tech makes a replacement valve for that fork.

The damping stack that they recommend is more for the track or smooth roads. It's pretty stiff.

I have the same bike as you with the gold valves in the front and it transforms the bike. The shim stack is not the one race tech recommends.

Contact eric at clubhouse motorsports and he can do the same for you.

http://ducatimonsterforum.org/index.php?topic=18933.0

I read the thread, but I don't understand -- do you have modified forks?

Do you have a picture of the gold valves?

ducpainter

#69
December 23, 2009, 01:55:16 PM
Quote from: Michael on December 23, 2009, 01:50:33 PM
I read the thread, but I don't understand -- do you have modified forks?

Do you have a picture of the gold valves?


Yes my forks have been re-sprung and re-valved.



That valve is not necessarily the one for your forks, but is similar.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Michael

#70
December 23, 2009, 02:06:50 PM
That's cool looking.

Well, I just ordered
- new springs (heavier ones because I weigh more)
- new bushings (I have a small leak on one side)
- new seals
- new dust seals

So, I didn't order a dampening stack or valves or anything else (except seal grease and a cover to protect the seals from the sharp fork).

My question is, is it okay if I just replace those things? I feel a little intimidated by too many changes, I just got used to the idea of changing the forks and seals myself.

:)

Speeddog

#71
December 23, 2009, 02:11:06 PM
Probably don't *need* the bushings, but might as well since you'll have 'em off and open.

Might want to consider ordering a seal driver as well, but likely cheaper to just get a local shop to push 'em in.
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

Howie

#72
December 23, 2009, 07:37:05 PM
The Race Tech valves have larger holes than the stock valves.  The valve controls high speed damping.  The shim stack is for low speed damping and further restricts flow.  The magic is getting the shim stack right.  Eric did my forks too.  Reason why?  He did all the trial and error on other bikes and has it all written down in his notebook.  Eric transformed my suspension and that is one of the reasons I kept the bike this long.  I would look for an equivalent guru near you, or maybe even mail them to Eric.  In New York we are lucky enough to have the good folks at European Cycle Services.

Michael

#73
December 24, 2009, 01:04:11 PM
The springs showed up today!

[clap]

Michael

#74
December 29, 2009, 10:50:31 PM
Quote from: ducpainter on December 23, 2009, 10:36:09 AM

I have the same bike as you ....


Do you have Showa forks or Marzocchi forks?

My VIN is lower than 009914 and I have Showa forks. I don't know if there is a feature available in one and not the other. So far the only difference I can see is that the Showa has a much greater oil capacity.

It's odd because the service manual says that Ducati recommends adding 30cc of fluid more than the original 457 cc to help improve performance. And it doesn't give a modified oil level measurement, instead it only lists the original. I mean, the way it's written, I should fill the fork with 457 cc of fluid, make sure the measurement level is exactly 79.5mm, and then dump in 30cc more.

The oil is odd, too. Instead of SAE 7.5 fork oil, for Showa it says use ATF SAE 10w20.

I'm glad I got the book.

Print
Go Up Pages 1 ... 3 4 5 6
User actions