don't forgot to check the spring rate if you are going for stainless - not sure about these days but they were often generally a higher rate than std items resulting in an (unacceptable) increase in effort at clutch lever.
Thanks Chris I never knew that. The ones I bought were for Ducati Performance clutch, but I don't know the spring rates. I haven't fitted the clutch yet. Do you know if an Oberon slave would be enough to overcome the additional required (extremely unnacceptable) effort required? Stainless would be nice just to avoid the rust!
Thanks Steve - I am wondering if over the years my clutch has morphed into a hybrid? What do you think?
Here are the components of a fairly standard slipper clutch. I wasn’t looking properly at your photos previously. I don’t know the correct terms in English to describe the parts but you can see that the part (hub?) to the left has elongated holes in it, enabling it to move (rise up) from the plate behind it on ball bearing equipped ramps built into the plate and thus disengage drive ‘slip’ under heavy engine breaking instead of locking up the rear wheel. In your clutch, the six posts that the springs fix onto are fixed into that central hub your clutch cannot move in this way and you would have to control your engine breaking via the clutch lever. If you have the budget and/or are planning to use on track, invest in one. It’s one of the best upgrades available! Sorry I didn’t look properly a minute ago.
If they are Ducati brand springs then pretty sure they will be fine. The good thing about our dry clutches is that it takes so little time to experiment and then swap back if necessary. If the Oberon is larger diameter than what you had fitted originally then it will help a little but (as you know) at the expense of lever travel and problems that arise because of this. It's only me, but I always get the spring rate right first (even if 2 springs need removing but a last resort unless you really prefer stainless due to corrosion problems) and then might lightly juggle with ratios afterwards.
Just to add to the confusion, there are different caps available with differing depths, which also alters the spring preasure. Steve
That’s definitely a standard clutch. Yours should have a slipper clutch. Mine certainly did. The OEM slipper wasn’t very good, though. Only three ramps, and no ball bearings. Mine needed lots of maintenance to keep it working well. I replaced mine with a six ramp with bearings Sigma Performance jobbie that I got from eBay. Your basket and plates look brand new. You’ll have to ride it a lot before that classic clutch rattle can be heard.
yes, didn't want to go there Steve, but you're right, aftermarket pressure plates, springs, caps, baskets and slave cylinders (and more) can all "creep" away from std dimensions turning what should be simple setting-up into a nightmare.
Its a bit of a hybrid according to my dealers. The basket and plate set are for the standard slipper clutch used on the 748R. The centre hub and pressure plate are not slipper clutch components. Think its had a bit of a transplant somewhere in its life. The clutch boss is someway north of £700, so I think I will leave it as it is (gulp). Standard R diagram here:
....Although the part numbers differ from standard to slipper for the basket. The one in mine is the lightened vented one, the standard is not vented? Dealers told me that back in the day, it was not uncommon for people to swap out the slipper for a standard clutch as they took a lot of looking after (@razz ) and some people simply prefered a non slipper. Costly (VERY) to change back. @El Toro - please move to the Technical Help section rather the Items Wanted section. Original title and first posting edited.
I swap my slipper and standard clutch over by changing the hub only, I leave the same basket in place. Steve
@Expat Jack, been off the internet this morning so only just picked up your tag. Just about everything said that could be except the clutch centre you have fitted is date stamped 1992 and the 748R slipper clutch didn't exist then. Sad to say a previous owner has cut corners to save money. You have options but the original 748R style 3 ramp slipper was the only one that had the clutch basket and centre made in steel, the later 6 ramp and ball slipper clutches might be cheaper but used an aluminium alloy basket and centre which wear out quicker. My 748R slipper is less sensitive to set up than my 1098R slipper which is a bitch to get right. The 748R slipper might be 'basic' but I've never had an issue with mine, when it's kept clean. Andy
