My very first CB450
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Thread: My very first CB450

  1. #1
    Junior Member BSAKat's Avatar
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    My very first CB450

    Hey friends! So, this is coming to live in my garage this weekend...
    My very first CB450-45276192_688002761569567_3671933082274889728_n.jpg
    My very first CB450-45198422_752990438382881_7901170477949779968_n.jpg
    My very first CB450-45174520_574357779653675_8318154275599417344_n.jpg

    It is, apparently, a 1972 model. It's a bit rusty and hasn't run in probably a decade. Other than that it looks in pretty good nick. As the title suggests, this is my first CB450 (and my second ever old Honda twin) so I figured I'd ask here for some advice. What should I look out for with the CB450? Any common failure spots? Any known troubles? Gimme the good, the bad, and the ugly please.

  2. #2
    Senior Member 76TWIN's Avatar
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    Nice bike.

    First and foremost, download a copy of the factory service manual. Don't even bother with Haynes or Clymer.

    https://docs.google.com/file/d/0B_Zu...t?ddrp=1&hl=en


    Things I would do if this was my bike before even attempting to start it

    1. Change the oil. Note if it smells like gas while you're at it. These bikes are notoriously for having the carbs leaking into the cylinders if the petcock is left on.
    2. Check cam timing, chain tensioner, check valve clearance and adjust as needed. Better follow the service manual on this carefully since it is very crucial that your cam followers (The "T" notches) be oriented away from the engine (See the FSM on page 22) or you could risk catastrophic failure/damage to the valves.

    3. Open up the right crank case cover and clean out the oil pump/slinger. You'll need a special spanner wrench for this or you can make one.
    https://www.common-motor.com/honda-cb-oil-filter-tool
    Last edited by 76TWIN; 11-02-2018 at 02:58 PM.
    Lefty likes this.
    '76 CB500T Frankenbike
    '73 CL450 (basket case for now)


    Carpe narem.

  3. #3
    Junior Member BSAKat's Avatar
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    Awesome, thanks for all that.

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  5. #4
    Senior Member Polish's Avatar
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    Welcome and nice find! Here's where to start:

    https://www.hondatwins.net/forums/67...-old-bike.html
    JL
    1979 CB 400 T (Cafe Racer)

  6. #5
    Senior Member Lefty's Avatar
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    76twin pretty much said it all. The cam followers are known to wear out, but I think keeping fresh oil in it and making sure you let it warm up at a low idle for a minute or so before riding helps a lot. It takes that long for oil to reach the cams.

  7. #6
    Junior Member BSAKat's Avatar
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    RISE FROM YOUR GRAVE, THREAD!

    So, after getting the CB200 mostly done I finally moved the CB450 into the active work area. I got a full tune-up kit, a full front brake system replacement since the stock system was seized/destroyed, new tires mounted, a bunch of new o-rings, carb rebuild sets, and some other miscellaneous parts. I cleaned out the oil flinger and changed the oil. Gonna re-mount the wheels, drop a battery in it, and see what happens next.
    My very first CB450-2019-03-20-13.12.05.jpg
    My very first CB450-2019-03-20-13.18.23.jpg
    These tires are from 1977 and they still hold air!

    My very first CB450-2019-03-21-15.22.03.jpg
    This extra wire is apparently factory, but what is it?

    My very first CB450-2019-03-21-15.36.56.jpg
    These old blue fuel lines are kinda brittle.

    My very first CB450-2019-03-22-11.19.17-1.jpg
    Love that new parts smell.

    My very first CB450-2019-03-24-12.42.50.jpg
    Finally on the jack!

    My very first CB450-2019-03-24-22.48.59.jpg
    Wheels off (also, I spilled some oil like a dumb rookie)

    My very first CB450-2019-03-24-22.48.20-1.jpg
    Out with the old.

    My very first CB450-2019-03-24-22.48.37.jpg
    Awaiting new rubber.

    My very first CB450-2019-03-25-12.15.41.jpg
    New Rubber!

    So, that's how it stands now. I'll have more pictures of my CB450 adventures as they happen. Hopefully I won't find anything near as ugly in this bike as I did in the CB200.
    '66/'67/'68/'69 BSA A65 Lightning Basket Case
    '72 CB450
    '74 Yamaha RD200E
    '74 CB200 (Currently In Progress)
    '80 Yamaha XS850 (Daily Rider)
    '02 Buell Blast

  8. #7
    Super Moderator frogman79's Avatar
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    Wondering how the wrong brake caliper fit on that 71 model bike? Title may say 72 but 70-71 had that sized brake caliper, different forks, body painted fork shrouds/headlight ears and headlight housing, and the flip up seat, not side opening. That is what my silver one used to look like or so I'm guessing from what was left of the paint on the old tank it had before I tossed it. I have same front end as yours and it is different from the 72-75 models.

    I kept the old brakes they are about 25% larger than the later ones and have 25% more brake pad catching the disk. It stops better than my lighter smaller 360. If you haven't already mocked up the caliper to the arm you might want to do so to verify it will fit as I am not 100% sure it will. I'm thinking the bolt holes are wider apart.
    Franz >>> 450 build >>>360 Build

  9. #8
    Junior Member BSAKat's Avatar
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    Oh, it's a '71. Built in December of 1970. I misspoke upthread
    '66/'67/'68/'69 BSA A65 Lightning Basket Case
    '72 CB450
    '74 Yamaha RD200E
    '74 CB200 (Currently In Progress)
    '80 Yamaha XS850 (Daily Rider)
    '02 Buell Blast

  10. #9
    Junior Member BSAKat's Avatar
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    It is risen...

    '66/'67/'68/'69 BSA A65 Lightning Basket Case
    '72 CB450
    '74 Yamaha RD200E
    '74 CB200 (Currently In Progress)
    '80 Yamaha XS850 (Daily Rider)
    '02 Buell Blast

  11. #10
    Senior Member ancientdad's Avatar
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    Can't be sure but the way it sounded on a rev, it's running on one cylinder - brief moments of the other cylinder popping in and out while it was idling
    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

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