could your problem be the new garter seal between the two bushes in the chain wheel be two tight on the newc3/2.Working with clutch pieces today, after learning how to operate a digital micrometer.
Some new pieces, some vintage....
the new C3/2 wont easily go thru the new bush PD22 in PD20 sprocket.
I can work it thru, but not free and easy.
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