Hi, I fitted new pressure plate, clutch springs and open cover last weekend on my 749s. Checked the clutch basket for play up and down, left and right when stripped and it was fine. Plates were cleaned and reassembled in correct order as per workshop manual. Pressure plate seated correctly as per marking to spring post. Springs tightened to 5nm in opposite pattern. New bearing came with new pressure plate, it is seated home and flat and the end of the push rod is pressed into the new bearing until fully seated. Now, I never inspected the old clutch parts with engine running before fitting the new parts however I'm noticing some wobble in the clutch pressure plate (or the whole basket) hard to say. It appears very very slightly with the clutch engaged however gets more noticeable with the clutch lever pulled in. I've attached a slow motion video below. It looks scary bad with clutched pulled in and slow motion. I've ridden the bike and everything is running fine. However it's really playing on my mind. Is this normal dry clutch rattle, movement? What makes it so noticeable is when you look through and align my clutch cover opening with the pushrod end. Can anyone else take a close look at their open clutch, square on and see any movement like this?
I see what you mean, watching the slo-mo part, from your post, I am assuming that you didn't remove the basket or re-tightened the fixing nut @Steviejam ?
It looks relatively OK when the clutch is engaged. The wobbling when the lever is pulled in wouldn't worry me too much. After all, at this point, the pressure plate is being pushed outward by a rod and has 6 springs working against it. The rod could be slightly bent, the springs could each be exerting different pressures. The pressure plate bearing may not be seated correctly. You can check the bearing easily, put the rod on a flat surface and roll it to see if it's true and buy some new springs.
8000 miles. Springs are brand new. Bearing is seated correctly. Never checked rod straightness but based on unmolested mileage I would think it's OK. Not sure if anyone has looked so closely at this before (slow motion and all seems to exaggerate it) Seems to go away when revs are increased. Resonance?
Looks normal.... I had a noisy clutch on my 06 ZX6R which I traced to the one way bearing in the basket being knackered....swapped it and the bushing out and it cured the noise but the whole basket and plates etc. still wobbled like 80yr old on her way to bingo....
Never looked that closely at mine but the wobble looks excessive to me, have you checked the small bearing inside the output shaft?
If you look at it from the opposite point of view, what is there to actually prevent the pressure plate from wobbling? It is separated from the basket by the pushrod compressing six springs located fairly loosely on six bolts. IMHO, it would be amazing if it were more concentric.
If the basket wobbles i would look at it seriously. I had a slight movement on my 996 basket two years ago. I could hold the basket and slightly move it up down left right, only a very slight mivement. Turned out to be the bearing on the left hand end of tge shaft. Trouble was that was a full engine split as the bearing is mounted from inside cases. Maybe i could of left it to get worse but the clearances are not great between the gears on the shaft and the rotating crank. I did a full strip to replace it. Not saying it is tge same problem but it is worth investigating.
I had the retaining 'star' washer on the hub actually 'eat' into the hub on my 916, this made the hub loose on the shaft to the point where it moved out a few mm and rubbed the cover, it also lengthened the stroke required to get clutch separation. Presumably being loose it could have wobbled too? I would look into the cause of this wobble because if it is something worn it will only get worse and potentially leave you stranded and with a greater expense to put it right...
Forgive me for resuscitating an old thread, but I found this while searching on my issue. I also too took a slow mo of my clutch, as I have been hearing a noise with the clutch pulled and was worried about a similar amount of wobble. I took apart my clutch and noticed the previous owner had used a decent brand of plates (Barnett), but a cheap clutch basket from ebay. I bought the matching Barnett basket in the hopes that this is the cause (in the mail), but, on the cheap ebay basket I can see interior scratches, likely the culprit of the noise. I guess I'll find out when I put the new basket in, How much wobble is okay? I'm not seeing very much room for play there, just fitting the plates into the basket. Is any amount of basket skimming allowable or expected. Any break in allowable, or is something very wrong if noises are heard outside of the usual clattery spectrum of dry clutches? New purchase and I'm looking for a hopeful outcome. :/ Rob.
It is normal to hear a jangling noise when you pull the lever in. The plates are separated and not under pressure so are floating around in the slots and ‘ring’ like the plates in a tambourine. What are the scratches on the inside of the basket?
This noise isn't within the boundaries of acceptable. It's a grating sticking intermittent metallic grinding. Really loud shifting to first. Dissipates slightly when the bike is hot. Despite this, the interior of the basket isn't destroyed and neither are the clutch plates. They're just catching evenly all around the interior. He really had the springs torqued down. I was just reading about a max of 7nm torque on those. Barely hand tight..
