dominator engine rebuild

[Jessecollett]

hi all, i'm new to the forum and have a couple questions.
im in the middle of my first engine rebuild. a dominator (same engine as xr650l)
when i was removing the kick start shaft there was a circlip that i broke (it was on the shaft where the arrow is pointing at). my manual doesn't have anything about a kick start in it and on part fiches of the kick start there is no sign of the circlip. Any ideas?


and here is the diagram:

Google Image Result for http://images.cmsnl.com/img/partslists/kick-starter-spindle-nx500-dominator-1989-austria_bigecn9j41e__1500_739a.gif

also,
on the balancer shaft there are those two gear wheels. are their teeth supposed to line up? the photos in my manual are useless




and lastly, the bike has done 60,000km /40,000miles ish. all the bearings feel fine but would it be a good idea to replace them anyway? or is that unnecessary? i was thinking i'd just replace the crankshaft bearings as the manual said to replace them if they came out with the crankshaft instead of remaining in the crank cases. (which they did)

any help or opinions would be much appreciated, thanks