1978 390 Amx Clutch Engagement

Need advise on my 1978 390 AMX that I recently purchased. After starting the bike twice before (a month ago and this past Saturday) and riding up and down the street with no issues, I was unable to start the bike a day later on Sunday. Finally, on Monday, I was able to start the bike again by standing to the kickstart side and using my right leg. Problem is after going only a few feet I heard a grinding? noise coming from the tranny. I thought possibly a broken 1st gear spring but I found no visible damage after removing the clutch cover. Rechecked the cable adjustment and both case levers seem to actuate fine. Before I start the bike again and possibly do any or more damage, is there something else I should check? Did the excessive and failed kickstarting the day before throw something out of whack? Before the issue arose, I changed the oil and used Ohlins shock oil 00105-05 viscosity28,0 cST. Any help would be appreciated. Thanks, Alex.

First thing i would look at is the dis engagement dogs . Probably half rounded off and drove for a bit then just rubbed on each other . Check the adjustment or indents on it etc

Is that at the end of the main-shaft unit and has to be pulled out of the cases? Alex.