stopper rings on crank?

Lower case...oil up everything well with 2cycle oil, add oil to oil pump cavity,set crank in lowercase, oil up stopper ring & work them in the lower case...lookat the online parts book here on T.Y....I based most of my orientation to the pics...others will chime in soon...
 
i personally have always had the rings up approx 3/4 of an inch, for it to catch in the upper case half, so it aligns crank to both case halves.
 


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