Hi, having bought a SIL 47T crownwheel, which is machined so that the friction plates can sit lower, and a Readspeed 5 plate clutch (which seems to be the same overall height as a standard clutch) I am struggling to see how it can work together correctly. I tried assembling initially without springs and found that the tags on the lowest plain plate sit below the level of the clutch spider (standard Innocenti S2 item) and do not engage. My guess is that it is unlikely that the clutch will be compressed this far in normal use, and/or the springs will be coil bound before it gets that far. That said if it is compressed far enough it would result in the bottom plates being stuck under the clutch spider and a clutch which wouldnt engage. This wouldnt happen on a standard crownwheel which doesnt have the slots machined deeper into the basket, as the plates would sit higher.
Presumably I need a different spider which extends the support for the lower plates nearer to the clutch sprocket. There seem to be several options, Casa, ReadSpeed and MB, the only one that is obviously deeper is the MB one.
Another option would be to buy crownwheel without the slots machined.
Do I need a new clutch spider/crownwheel or am I overthinking this ?