Split cases and found thisSplit cases and found thisI had a hard time separating the upper and lower cases on my CB77 and couldn't understand why. I gently pounded in some little out of the way places and they finally separated. I found a tight fitting collar about half way up on one of the interior studs that prevented easy separation. I know the cases have been split before so it was left in place on reassembly. Does anyone know what this is for? Should I remove it or leave it in place? It is only on one of the studs.
Re: Split cases and found thisThat’s a locating dowel (knock pin) that was in the wrong place, I’d say... Study the Shop Manual for a better idea as to where they should be. Items 3, 4, 5 & 11 here:
I mis-stated where the collar is located in my original post. It is located midway up the threaded portion of the stud. It is threaded and screws on like a nut.
e3steve, thanks for the idea that it is a knock pin. If it were, wouldn't it be located at the base of the stud so that it could align the upper and lower crankcases. I don't see how it could help in aligning them when it is located at the threaded end of the stud. Stuck casesI think you might be looking at a crushed (aluminium) sealing washer which can compress onto the threaded part of the 6mm stud which passes through the main oil gallery. If this happens the washer can usually be screwed off the stud with a pair of pliers and the cases will then come apart. The washer should be replaced every time you split the cases anyway.
Stud 29, sealing washer 32 and sealing nut 31 on the parts diagram.
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