Clutch Questions

Don't know much about slipper clutches but I'd be amazed if half a millimetre is the difference between slipping and dragging.
My conventional clutch is way under recommended stack height and doesn't slip.
I suspect your drag may be due to the tabs binding in the basket slots. Does it get worse as the motor warms up?

 

It may be but I think there's something else going on.
I had terminal drag when I replaced my frictions and tried correcting it with stack height. No go. The cure was to put some of the old plates back in the top of the stack. This allowed the plates to separate and eliminated the drag.

 

Indeed. What you need is a mate with some old alloy frictions. Or a bike shop ??

 

Haven't read whole thread so soz if already covered...

Ducabike do different spring tensions to adjust the slipper action, they usually come with the clutch: 6M01 - KIT MOLLE FRIZIONE VERNICIATE - 749 / 999 - SUPERBIKE

Once you've got the slipping/dragging problem sorted, if you still find the clutch too grabby and you use metallic (ie bronze or whatever that gold shit is) friction plates, then replacing a few with fiber plates can make it much more progressive and less grabby whilst still retaining some of the benefits of the metallic plates. Basically if you had a complete set if fiber plates and a complete set of bronze plates you'd just replace bronze with fiber until you get the feel and action you're looking for.

 

The check for friction tabs binding in the basket slots is to warm the motor up and try and get them out. If they slip out easily they're not binding.

 

I needed to reduce the pack thickness on my Monster's clutch as it was a tad too thick and dragging, making finding neutral whilst stationary impossible. I replaced some 2mm plates with 1.5mm, the only 1.5mm plates I had at the time were dished so I used them and it dragged the same - got some flat 1.5mm plates and problem solved.

If you think about it a 1.5mm dished plate is over 1.5mm thick due to the dishing and yet doesn't make full contact with the friction plate when clamped because it's not flat. I don't see what advantage they give? Clutch takeup is fine without them and I can only think them more likely to slip, so I don't use them anymore.

 

Edited to say - Sorry I meant 1.5mm not 1mm!

First I tried a UK dealer but was told that although showing on the system, they couldn't order them, maybe because they're listed as 'racing' parts? Part number is 19010231A BTW.

You can find them on ebay but usually not UK sellers, here's a pack of 4 from France; Ducati Kit 4 x Driven plate th. 1.5 for Race 996RS 998RS 999RS 1098RS 19010231A | eBay

 

Also, if you had access to a surface grinder you could get some 2mm ground down - I thought about this as I've got loads of spare 2mm but it was quicker to buy the thinner plates.

 

Yes, they're expensive. There maybe cheaper out there if you search or, as above grind some 2mm.

 

Before going to loads of expense, check for binding first - it's free...

 

I now go to EVR through Craig at MR for my steel plates. Cost effective, 2mm, 1.5mm and 1.5mm dished plates readily available. Only drawback is you need to pick your time when Craig is preparing an order. Andy

 

Now get some work done!!!
Steve.