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CB400/4 ENGINE STRIP, ASSESSMENT AND REBUILD BY JULIE - NOW COMPLETE
Nurse Julie:
Finished assembling the bottom end today.
First to go back in was the camchain tensioner. Here is a photo showing all the parts
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The push bar has 1 flat side which faces upwards and the tensioner adjusting bolt pushes on to this to lock it. At the other end is a flat pad which sits on the horseshoe. You can see on the assembled parts a little raised bit on the top of the pad which also shows which way up it needs to be to get the flat side of the bar sitting in the correct place.There are 2 springs that go over the push bar. The horseshoe has 2 bolts holding it in situ and a bit of thread lock was put on as suggested by Bryan, as he has seen these come undone before.
The outer adjuster with the locking nut
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This photo shows the tensioner in the locked position and will be adjusted when the top end is all in place and the top mark showing the push bar is facing the correct way. You can see the pad that goes onto the horseshoe.
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The casing then had the lightest smear of Honda Bond applied, also to the outer sides of the oil seals. The primary chain is in situ on the drive sprocket. There is only the primary chain holding the drive sprocket in place at this stage, hence it's funny angle as the drive shaft is inserted after the cases are put together.
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Nurse Julie:
The other case had bearing guard applied to the shells. No, that's not a crack across the chain guard, it's a piece of cotton from a rag !!!!
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And the cases were put together, not forgetting the dowels and bolted and torqued.
The Primary shaft was then put through the side of the casing, through the circlip, the bearing, the other circlip, through the drive sprocket hub, through the drive sprocket and the collar and through the circlip, the bearing and the other circlip and out the other side. Another collar was put over the shaft, the cog was put on the end of the shaft. Finally the Primary shaft lock washer was installed with 'OUTSIDE'.....facing outside !!!.
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You can see the new head stud in place replacing the one that had to be mullered to get out.
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You can see on the photo the kick start mechanism I installed the other day. And the advance/ retard unit has been put back on.
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I have a couple of bolts missing from the top casing at the front. I can only think that there were Allen bolts fitted, so I will replace with the correct ones.
Nurse Julie:
NOW............the most amazing thing, the head has been skimmed. He says it was my nagging that made him do it but I think it was the promise of bacon and onion suet roly poly that encouraged him really .
The dotted lines show the most skimmed area and Trigger says this is quite common as it heats up more on #2 & #3 more than #1 & #4.
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And..........the front brake disk has been skimmed also. The front face of the disk was as flat as a witches tit, the backside was like a roller coaster. I hope all this will stop the squeak !!!!
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Johnwebley:
not just stop the squeal !!
but stop the bike !! and you
Nurse Julie:
--- Quote from: Johnwebley on December 14, 2017, 09:38:44 PM ---not just stop the squeal !!
but stop the bike !! and you
--- End quote ---
Ah,yes, that as well John ☺☺☺
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