I've been working on getting the modified 400 engine back together.  It was apart when I got it, so there has been some trial and error with shims, shift drum placement, not shifting after assy, etc.  So after about 3 tries and various bench testing, it is together and shifting correctly, ready for complete assembly.  Shifts good, crank spins free, etc.  So I start on the RH side, and get ready to install the clutch - and find the internal actuator rod still on the bench!  Only bike I can remember having apart where the rod doesn't go in through the clutch side -

So it's coming apart again this week, to have the rod installed.  Hopefully for the last time.

Yep I triple checked that on my first DT400C because it would be easy to miss. Glad you have it sorted. I recall using a zip tie to hold the kicker spring in place while the right case was married up to the left. Good luck on final assembly.

Yes exactly that happened at work the first time a Yamaha with 'that' system was dismantled. Wasn't me caught out but was a lesson that i never forgot. Learnt a lot of new swear words that day haha. Don't think they ran that idea for long, probably got tired of complaints to the factory of being caught out so went back to the usual system. I feel your pain though!!.