HELP PLEASE FELLAS!  I am at an impasse.  I've posted several times over the past 6 months on this same topic and have received excellent guidance; but the problem persists.  I've done many things (everything I could think of and what has been advised) and have been working on my DT360a that I bought new in Japan in 1974.  I won't rehash all that but I did find that the right crank seal was popped out on the forward side with a bent retainer clip...AHA!  Bought a new seal and 2 clips, installed the new seal, and put it all back together.  Rode it and it still ran very poorly and smoked a lot.  Plus, when I pulled the cam plate tensioner plug about 6 ounces of tranny oil came out.  I thought the seal must have popped out again so this morning I took the clutch case off and the seal was still in position.  On very careful inspection I noticed two things:  the circumferential spring imbedded in the seal was slightly bent and in the inner case right underneath the clutch there's a small irregular hole.  I took photos of both of these "defects".  Other than a bad right seal, how can tranny oil get into the crankcase?  Any advice will be greatly appreciated.  Many thanks!  Pat 

how did this oring look?


here is a pic of opposite side. you can see how the crankcase splits off the trans/crank.