CB200 Top-End Job - Engine Out of Frame?
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  1. #1
    Supporting Member kirkn's Avatar
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    CB200 Top-End Job - Engine Out of Frame?

    Well, like the subject says: can you do the top end (head & cylinders off) on a '74 CB200 with the engine still in the frame? It looks like the motor has to come out...

    My CB200 project is leaking pretty badly around the right-side cam bearing 'pod'. Don't know much more than that. Maybe they can even be repaired withOUT removing the head?

    Guess I ought to go look thru the shop manual, eh?
    Kirk


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  2. #2
    Sensei 66Sprint's Avatar
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    Re: CB200 Top-End Job - Engine Out of Frame?

    Kirk...It IS necessary to take the engine out to get the head off....and, you'll want access to the cam if you are replacing the journal gaskets...(see topic about oil leak at points)...The engine is pretty straight-forward.....I can provide help or specs if you get stuck, but from what I know of you so far, you should be fine.......First priority...get a gasket set.....You might also want the top end seals (camshaft, tach drive, tappet cover 0-rings...)
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."
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  3. #3
    Supporting Member kirkn's Avatar
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    Re: CB200 Top-End Job - Engine Out of Frame?

    Poop.

    I just read thru the shop manual, and read thru the oil leak behind points cover thread, and yep, I guess that's what I'm in for.

    Poop.



    On the other hand, maybe I'll just let it weep. Y'know, kinda keep an eye on it...
    Kirk


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  5. #4
    Sensei 66Sprint's Avatar
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    Re: CB200 Top-End Job - Engine Out of Frame?

    ARUUUUUUUGH!......


    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."
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  6. #5
    Member CB200's Avatar
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    Re: CB200 Top-End Job - Engine Out of Frame?

    YOU CAN DO THIS W/O PULLING THE MOTOR!
    If you have let your oil weep and still need to replace gaskets here is my in frame method. Remove the rocker caps and rotate the motor untill the two rockers on the side you wish to work on are both well in their closed part of the cycle (compresion stroke). Then back off the valve adjusting screws so you've got plenty of freeplay on both. Losen the cam tentioner bolt. The spark advance side comes off strait forward. The tack side should have the cable pulled to remove-reassembly on that side is a bit of work. Use two screwdrivers (one on each side) to pull the end housing and make sure that were you place them is solid not fins, and places that will not chip. It's not a force them into the mating surface but pry them out. When you put them back on you'll need to lift the housing up a tad ( the timming chain tentioner will produce a force but if you've got the rockers slack it's easy) to get them in, use two screw drivers on the bottom to lift- precautions as above are less strict. Don't forget to place the little washer for the bottom of the tack pinion in place first held down with a little grease. Then put the pinon in after you start the tack housing on but before you seat it in all the way. Don't forget to replace the tack pinon oil seal with a new one-this can cause a leak that shows up in a different location as it may have oil flow in an invisable film untill it finds something to condense on. Do only one side at a time. Most important of all NEVER REPLACE THE END GASKETS WITH HOME MADE GASKETS!!! The final compressed thickness of these gaskets is critical. CB200
    P.S. As the side cover comes off look between the cover and head and see if the rocker shafts are pulling out too-if so use a needle nose to hold them in the head and then finnish pulling off.

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