Interest in 8 plate clutch conversions?

Would you be interested in an 8 plate clutch conversion?

  • Yes! my money's on the way

    Votes: 18 60.0%
  • Are you kidding? Those are not genuine Yamaha!

    Votes: 0 0.0%
  • Clutch? no one ever has clutch problems!

    Votes: 1 3.3%
  • Maybe later on, after I get my build/restore done and on the road.

    Votes: 11 36.7%

  • Total voters
    30
You might have posted a link Gary but what is required for machining later model clutch baskets?
 
You might have posted a link Gary but what is required for machining later model clutch baskets?
Here's Ippys how to read this, and his next couple posts.
http://www.xs650.com/threads/alto-8-pack-clutch-kits.33399/#post-342646
I've got to look through this myself, I have a late clutch apart on the bench.
Quote from ippy's post
"Okay here is a brief run down of what is needed to convert the later (late '78-'83) spring loaded clutches to an Alto 8-pack clutch. If you have access to a lathe or a good machine shop it is quick and inexpensive. Sorry I did not get any pictures of the inner clutch boss prior to machining, maybe someone can post up a pic, but I do have a simple drawing of the profile so that there is at least some representation of what was done. This guide is written assuming everyone knows how to access the clutch and remove the inner clutch boss.

1. Remove - ring, clutch boss (item #8); plate, clutch 2 (item #9); spring, clutch boss (item #7) and plate, seat (item #6)

2. Machine or have the inner clutch boss from original to like the modified clutch boss in the attached diagrams.

3. Re-install modified inner clutch boss.

4. You can probably re-use the plate, clutch 2 but mine had a groove on the bottom side and I used another of the regular steel plates.

5. Install Alto clutch plates and steel plates starting with a Alto plate and alternating with the steel plates.

6. Re-install pressure plate, springs and screws. Button up the RH side cover, fill with oil and have fun.

There is no need for any machining of the outer basket or the back side of the inner clutch hub. All machining that needs to be done is as shown in the diagrams and the finished picture."
 
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1. Remove - ring, clutch boss (item #8); plate, clutch 2 (item #9); spring, clutch boss (item #7) and plate, seat (item #6)
I
What does this spring actually do. What was the reason to put this assembly in the later clutch.
 
On the later "spring assembly" clutches I keep looking at ippy's machining and and at the clutch I have apart and I don't see any way for the machining to work because the the finger recess does not extend to the bottom of the inner basket so a steel cannot drop to the machined position. perhaps 5twins add a friction and steel plate to the stack with those first 4 pieces in place will fit without extending beyond the outer basket fingers, binding the springs, or hitting the cover. Needs to be tried. @joebgd is that the clutch you have?

81 clutch spring pack.png
 
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Yes, I have a 1980 special. I'm doing some tweaking on her this season. Starting with carbs, then try and retard the timing a fuz. The clutch slips especially in the higher gears. It slips allot in 5th. I have never been in there tho. I don't see how the 6,7,8,9 that does anything what type of spring is that? Where does it lift or apply forece. Idk I just can't seem to get my head around that. When I do address the slip I'll start with 3 new springs or !maybe all 6. Eventually when it's time it's going to get a 750 kit and higher 5th or possibly high ratio primary.
 
Am I misunderstanding something? This is a 256 clutch and the basket and outer p-plate are aluminum.
View attachment 172027
my bad? will have to check if one friction will be enough to keep the first steel above the unmachined section or might have to use one stock friction plate?
20200715_102111.jpg
 
Gary sorry for the delay! Not getting any notifications on here for some reason. Money sent!
 
Gary sorry for the delay! Not getting any notifications on here for some reason. Money sent!
and received, your plates will be out in tomorrows mail. Thank you!
New OEM steel plates should be arriving tomorrow.
Noticed, discovered a few interesting things about clutch plates, will be posting details soon.
 
Here's where I'm at; I have plenty of new Alto plates yet. I think 10 sets have gone out. I'm out of used plates, but 10 new OEM steel plates have arrived. Also got a couple of spring sets from parts giant.
I'll stay with the giveaway:rolleyes: price of $90 for 8 plates, or $100 for 8 plates and one new steel, shipped to your USA door for a bit longer. You early adapters get the deal, install and ride reports wanted.

In this view you can see the tangs on the sock plates are thicker than the rest of the plate. (Edited after further thought:geek:) Since the tangs are located outside the steels thickness doesn't matter.
stock friction plate detail.jpg


The alto plates being steel don't need that additional thickness in the tangs for strength.

Alto stock plate edge view.jpg

Here's a detail side view of the "Special clutch pack" Spring assembly parts. pic is "upside down" of assembly order.
special clutch washers.jpg


special clutch hub.jpg


81 clutch spring pack.png

Still need to tool up for the machining and see if an Alto plate will work for the first friction or a standard plate is needed for the extra thickness to account for the grooves for the steel plates not going all the way to the flat section...
Well that all seems a bit "muddy" yet...:cool:
 
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