I am probably going to replace steel drive plates and friction plates.   Not sure about the rubber cushions yet if they are even needed, but the lil guy shifts 
so smooth since I rebuilt the trans I almost want to replace those too.  

Was looking at Barnett for now.   

update: Barnett has discontinued the plates and it appears partzilla does have them in stock.  $285

Pabdt, unless the steel plates are really warped I personally would not replace them. I would keep the rubber cushions.

Im running this china clutch in my ct3. 150 miles so far. im not running the cushions for now and just hit he steels with some scotchbrite.

5pcs Clutch Friction Disc Set For Yamaha AS2 AT1 CS3 CT1 DT100 HS1 LT2 MX175 YA6 | eBay

I'm still using original from 1970 haha. Cover never been off.

DVM, when I got this bike, the orig engine was in a box with 2 other clutches, so plates are gone. However, I do like those weighted plates. My DT125A is smooth as glass w/them.

I think I may experiment by adding another drive plate (if it fits) to tighten stack or a washer to shim the flywheel bolts possibly both unless the friction plates are worn/poor shape.

84PRERUNNER, thanks for the reference.

RT325,that’s impressive—50+ years and still untouched! at this point, opening it would feel less like routine maintenance and more like an archaeological excavation.