Ducati Monster Forum

Moto Board => Tech => Topic started by: TitanMonsterS4R on January 06, 2013, 08:26:12 PM

Title: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 06, 2013, 08:26:12 PM
So I decided to venture into my clutch to swap the pressure plates.  Got everything ready and removed old pressure plate.  Now I can't find the marking on the bolt that I need to line up with the marking on the new pressure plate.

Anyone know which one it might be based on the photo?

(http://i777.photobucket.com/albums/yy51/wbamiduro/Senna/photo_zps1a8b2a6f.jpg)

Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: Speeddog on January 06, 2013, 08:48:05 PM
That's a slipper clutch, so pressure plate goes on in any orientation.

Make sure the last plate to go in is a steel.

Um.... You got a slipper-style pressure plate, yes?
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 06, 2013, 08:51:34 PM
Quote from: Speeddog on January 06, 2013, 08:48:05 PM
That's a slipper clutch, so pressure plate goes on in any orientation.

Make sure the last plate to go in is a steel.

Um.... You got a slipper-style pressure plate, yes?

well that a good question.....what's the difference?

Now I ask.....
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 06, 2013, 08:53:22 PM
this is the one I got from Monsterparts.com

http://www.monsterparts.com/p/361-25/Barnett+Dry+Clutch+Pressure+Plate.html (http://www.monsterparts.com/p/361-25/Barnett+Dry+Clutch+Pressure+Plate.html)
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: He Man on January 06, 2013, 09:11:47 PM
that wont work. well it will, it just wont work like a slipper. a slipper type plate is smooth on the inside as it allows the unit to slip.

(http://dukedemon.com/ekmps/shops/dukedemon/images/ducati-slipper-clutch-pressure-plate-794-p%5Bekm%5D300x114%5Bekm%5D.jpg)
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 06, 2013, 09:17:38 PM
Quote from: He Man on January 06, 2013, 09:11:47 PM
that wont work. well it will, it just wont work like a slipper. a slipper type plate is smooth on the inside as it allows the unit to slip.

(http://dukedemon.com/ekmps/shops/dukedemon/images/ducati-slipper-clutch-pressure-plate-794-p%5Bekm%5D300x114%5Bekm%5D.jpg)

Thanks for the guidance SpeedDog and He-Man.

Put everything back but with difference springs and caps.  Everything is snug.  Should the clutch turn freely without me having to engage the clutch lever?  Right now it's tight and unless I pull the lever it's not moving at all....

Sorry for the noon question.  First time. Be gentle  [beer]
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: He Man on January 06, 2013, 10:41:37 PM
either type of clutch will not move by hand without engaging the clutch.
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 07, 2013, 05:43:34 AM
New springs in and original cap back on, go to pull clutch, lever pull feels a tad bit harder (to be expected).  Examine space between pressure plate and steel ring and there's very little, is this to be expected, I assume so?  I tightened the springs in a star formation. 

Is there anything I should be looking out for when test riding the bike?
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: He Man on January 07, 2013, 09:03:32 AM
the space is relative to how well u bleed ur system and how much action you have at the lever. but ther eis a gap (otherwise the clutch plates wont release and ud be stuck. just make sure the teeth on the hub meshes with the teeth on the clutch.

it wont be any different from stock not unless u swapped clutch packs.
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 07, 2013, 09:19:28 AM
Quote from: He Man on January 07, 2013, 09:03:32 AM
the space is relative to how well u bleed ur system and how much action you have at the lever. but ther eis a gap (otherwise the clutch plates wont release and ud be stuck. just make sure the teeth on the hub meshes with the teeth on the clutch.

it wont be any different from stock not unless u swapped clutch packs.

I didn't touch the clutch pack at all when I was messing with the pressure plate.  Would it be in my best interest to bleed the clutch since I installed new springs?
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: Armor on January 07, 2013, 09:24:51 AM
You will affect the operation of the slipper clutch if the springs are not the same.
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 07, 2013, 09:41:17 AM
Thanks.

Going back to the original setup, caps, springs and all.  Will do everything at once (pressure plate, slave cylinder, caps and springs) when i have all the parts. 

Wisdom prevails  [bow_down]
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: He Man on January 07, 2013, 09:55:47 AM
Quote from: Armor on January 07, 2013, 09:24:51 AM
You will affect the operation of the slipper clutch if the springs are not the same.

hes not using a slipper pressure plate so the unit as a whole will not behave like a slipper already so the springs arent goign to change the performance at all.
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 07, 2013, 10:03:16 AM
Quote from: He Man on January 07, 2013, 09:55:47 AM
hes not using a slipper pressure plate so the unit as a whole will not behave like a slipper already so the springs arent goign to change the performance at all.

@He-man - I removed the aftermarket pressure plate I bought from MonsterParts.com and went back to the original slipper pressure plate that was on the bike.  When I put the orig. pressure plate back on, I used the new springs and caps I also purchased.  My understanding is that I need to use the orig. springs/caps and slipper pressure plate.  Using the orig. pressure plate with new springs will cause the bike to not function correctly unless I bleed the clutch.

Is this accurate?
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: Speeddog on January 07, 2013, 12:00:36 PM
Quote from: MonstaS2R on January 07, 2013, 10:03:16 AM
~~~SNIP~~~

Is this accurate?

Not really.

The original slipper pressure plate, springs, caps, and hub very likely came as a set, from the slipper clutch manufacturer.

Changing to a different pressure plate, or different springs, or different spring caps, *can* effect how the clutch slips, as it can effect the spring load on the plates.

Bleeding the clutch system is totally seperate from the pressure plate and it's associated parts.

It can effect how the clutch operates, but it's not going to effect how the parts work together.
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 07, 2013, 12:19:01 PM
Quote from: Speeddog on January 07, 2013, 12:00:36 PM
Not really.

The original slipper pressure plate, springs, caps, and hub very likely came as a set, from the slipper clutch manufacturer.

Changing to a different pressure plate, or different springs, or different spring caps, *can* effect how the clutch slips, as it can effect the spring load on the plates.

Bleeding the clutch system is totally seperate from the pressure plate and it's associated parts.

It can effect how the clutch operates, but it's not going to effect how the parts work together.

Dry clutches are new to me.  So understanding the basics of how they work.  Trying not to damage the clutch basket, would it be better for me to run the stock slipper pressure plate with caps/spring until I find a new one pressure plate and then do all new parts at once or does it not matter.  Will the bike will still have to deal with the same spring load/slip issues until broken in?
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: TitanMonsterS4R on January 07, 2013, 04:22:34 PM
Took her out for a spin this evening and everything seemed to be fine with the old bike using the original slipper pressure plate, new springs and caps.  Took her through 3rd gear and everything seemed fine.....However it was only a short ride.

Everything should be alright I suppose.....Right, right??
Title: Re: Pressure Plate Swap - Can't Find Marking
Post by: He Man on January 07, 2013, 07:44:39 PM
Springs are used to tune slipper clutches. Heavier clutch springs means more back torque required to engage it, lighter means it will slip sooner.

You should have no issues, but if you use a heavier spring, you can sometimes run into an issue where its hard to find neutral. if that isnt a problem then just ride on!