Hi I have got 2 900 sei’s and both have clutch rattle, with the lockdown I decided to investigate a way of curing it.
Using Benelli service tools it was quite easy to remove the clutch and replace seals and o rings.
on close inspection I noticed some play on the first steel clutch plate and the centre drum on the splines!
I Removed the plate by releasing the circlip that holds it in place it is made of mild steel. I decided because of lockdown and spares scarcity to effect a fix of my own. I took the plate and placed it on an anvil and gently hammered the spline only to spread the metal a little. I did this by methodically going around the plate then checking it on the clutch center drum. Eventually it was a snug fit with no play you must not hammer the disc part just the splines
I then reassembled the clutch and readjusted it before starting the bike up, it was much quieter than any time that I have owned this bike in the last 30 years.
i hope this maybe of help to those who have a sei with rattle on tickover
1981 Benelli Sei 900
1989 Benelli Sei 900
1976 Benelli 125 Enduro
1981 Benelli 250 2c
1976 Benelli 250 Quattro
1992 Ducati. 907 ie