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01' 750 Showa fork spring adjustment

Started by scaudill, February 23, 2015, 07:27:59 AM

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scaudill

February 23, 2015, 07:27:59 AM
Will I need to disassemble my forks to adjust the spring tension?  Read somewhere the M900's were adjustable at the of bottom the fork.  The parts manual for the M750 Dark shows an adjusting screw at the bottom of fork.  I don't know if the Dark model is different.
Any help will be appreciated.
Sterling

ducpainter

#1
February 23, 2015, 08:36:19 AM
Your forks are not adjustable. Sowa adjustables have screws top and bottom, and they adjust damping, not spring preload.

I believe they are Marzocchi not Showa. If they're Showa it will be cast on the inside of the fork leg.

The screw at the bottom is to hold the cartridge into the lower. It's not an adjustment.
"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."


scaudill

#2
February 23, 2015, 10:48:18 AM
The forks have Showa cast on the fork bottoms.  I'll be changing the oil soon, maybe a spacer can be added.

ducpainter

#3
February 23, 2015, 12:13:33 PM
Quote from: scaudill on February 23, 2015, 10:48:18 AM
The forks have Showa cast on the fork bottoms.  I'll be changing the oil soon, maybe a spacer can be added.
There are lots of mods for the Showas.

Fresh oil, and the correct straight rate spring from Race-tech, or others will make a huge difference.

You'll be chasing your tail a bit trying to work with the progressive rate spring they come with.
"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."


Howie

#4
February 23, 2015, 03:28:54 PM
Quote from: ducpainter on February 23, 2015, 12:13:33 PM
There are lots of mods for the Showas.

Fresh oil, and the correct straight rate spring from Race-tech, or others will make a huge difference.

You'll be chasing your tail a bit trying to work with the progressive rate spring they come with.

Words of wisdom!  Even better, depending on where you are located, think about sending the forks to Speeddog (Valley Desmo Service) or Eric (Clubhouse MotorSports llc), both DMF sponsors and have them set the forks up for you with proper linear springs, valves and shimstacks est up for your weight and riding style.

the_Journeyman

#5
February 23, 2015, 05:28:55 PM
I have the non-adj Marzoochis on my '99 M750, same basic idea as the non-adj Showas.  I tossed in straight rate springs with a preload shim and they work much better than the pogo sticks they used to be.  They're nothing like having folly adjustable Ohlins, but work well.

JM
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scaudill

#6
February 24, 2015, 02:36:25 PM
quote   modify    remove

Why do my posts have a RED X @ the remove option? 
Sterling

ducpainter

#7
February 24, 2015, 05:08:51 PM
Quote from: scaudill on February 24, 2015, 02:36:25 PM
quote   modify    remove

Why do my posts have a RED X @ the remove option?  
Sterling
Posts or threads?
"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."


scaudill

#8
February 24, 2015, 09:48:26 PM
I have three post's in tech under different headings.  Each time I reply the red X appears right hand corner.  I guess it only appears for me to see.
Sterling

Howie

#9
February 24, 2015, 10:32:23 PM
I get a red X too.  Dunno what it for.  I did a test post, hit remove, and it worked.

ducpainter

#10
February 25, 2015, 03:52:22 AM
Quote from: scaudill on February 24, 2015, 09:48:26 PM
I have three post's in tech under different headings.  Each time I reply the red X appears right hand corner.  I guess it only appears for me to see.
Sterling
I misunderstood.,,sorry

The red x is a warning to you that if you click remove it's irreversible.
"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."


scaudill

#11
February 25, 2015, 05:43:01 AM
Then the red X is visible to the OP only.  Thought I might have done something wrong.
Sterling

ducpainter

#12
February 25, 2015, 05:49:46 AM
Quote from: scaudill on February 25, 2015, 05:43:01 AM
Then the red X is visible to the OP only.  Thought I might have done something wrong.
Sterling
Yes...it only shows on your posts.
"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."


jduke

#13
February 28, 2015, 05:02:22 PM
If the forks are Shows, I've read the installing the inner parts of Suzuki forks make a night and day difference. Might be something to check into.

brad black

#14
March 01, 2015, 02:20:34 AM
i've got some 1999 750ssie 43mm showas apart at the moment.  these have lots of damping std, both comp and rebound.  massive amounts of comp more than pretty much any other ducati fork.  and the usual dual stage too soft springs.  i was going to add 10 - 15mm more preload and drop the oil level from 95mm (what they were, spec 105 or so) to 145mm, using 5 weight oil.

I'll run the travel/force test on them like that and see if i've screwed it up.
Brad The Bike Boy

http://www.bikeboy.org
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