Dating A Ratchet Top
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Tourer
Joined: Mar 2020
Posts: 339
Likes: 138
From: Bay Area/Valley, California
Main shaftis a no go, case has the ears for the 70 & up aluminum primary, safe bet most the rest of the bikes a creative frankenbuild. What bearings did the counter shaft cluster have? Loose or caged?
From the looks of it drain either needs to be welded and redone or timesert like for spark plugs if you find the right size, helicoil won't stay, case is too thin and oil will weep around it. Went through that one last year. It had been welded but they screwed something up. So hacked off a 3/4" bolt and jammed it in crooked. Owner didn't want to weld it again, so I milled it flat to match the thread angle for a sealing face, doctored the bolt to take an o-ring, took some off the head to thin it down and off he went.
From the looks of it drain either needs to be welded and redone or timesert like for spark plugs if you find the right size, helicoil won't stay, case is too thin and oil will weep around it. Went through that one last year. It had been welded but they screwed something up. So hacked off a 3/4" bolt and jammed it in crooked. Owner didn't want to weld it again, so I milled it flat to match the thread angle for a sealing face, doctored the bolt to take an o-ring, took some off the head to thin it down and off he went.
Club Member
Joined: Mar 2009
Posts: 66,128
Likes: 51,461
From: Niles Canyon Ca.
Needle bearings makes it a 75 or earlier gear box then. Get the plug out see what you got to work with hole size wise and go from there, you aren't particular lots of metric off the shelf oversize drain plug repair kits cheap. I have a lot of goods for the early ones, all the bushings, shims, all the nickel & dime rebuild stuff if you hit a wall.
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