Hi All, I am relatively new to my CBR and with slipper clutches coming from triumphs bikes. I am experiencing a light knock or clunking noise from what I assume is the slipper clutch causing maybe chain slap noise. The noise occurs when applying throttle and slightly more so when backing off throttle when staying in gear. The dealer tells me that this is normal operation of the slipper clutch and that I should also ride the clutch slightly more with a slipper clutch than normal bikes. I did road test a 2012 CBR1000RR before buying my bike which was also making the same noise. I thought maybe this was just a loose chain at the time. I have checked the chain tension with is perfect at 30mm & applied fresh chain lube. I just want to make sure that slipper clutches can cause this noise as told by my dealer. Everything else is perfect and still running-in the bike. Thanks in advance for any advice. Andy
They are a bit clunky on and off throttle tbh ... As mentioned I just use the clutch to smooth it all out...
how does the slipper cause this?.a clunky gearbox is down to usually chain slack,but as you've checked that so not that. or the gearbox is just that,clunky.I cant think how it could the be the slipper clutch,it's no different to a normal clutch in the way it works under normal use.as for being advised to "ride" the clutch? burnt plates wont be too far off your service list. do dealers have little sweepstakes going to see how much crap they can get away with when dealing with customers?
I read into it a bit before buying the blade and the slipper clutch in it is not conventional like most ... it's rather unique in fact. This gives the basics: As for burning the clutch out, given its a wet clutch, in general use it will be fine.
Not sure how you work out that's not like a conventional slipper clutch design.........it still uses a selection of ramps to reduce the pressure on the clutch plates like every other slipper clutch on the market? When dropping gears and the torque from the rear wheel overwhelms the clutch system it causes the ramps to move allowing the plates to part slightly allowing them to slip allowing the gearbox and wheel speed to equalise to each other and as this happens the ramps retract and the plates regain normal full pressure again. The only difference I can see with the Honda slipper system compared to others is that it also works in reverse where the clutch plates actually get loaded when the bike is accelerating.
Just a quick update. Added another 200 miles on the blade and hardly get any chain slap noise now. Also the gear change has started to become smoother. Re-checked my chain tension and it's between 30mm-35mm. Just over the recommended 30mm. I think the CBR does prefer the loose end of the chain tension scale. I had the same on my Triumphs with smoother gearchange on the very loose end of the chain scale.
