Another kick at the cat, 71 CL 450 restoration

Discussion in 'Old's Cool' started by anonny, Aug 30, 2011.

  1. anonny

    anonny What could go wrong?

    Joined:
    Mar 20, 2007
    Oddometer:
    5,763
    Location:
    Beautiful Revelstoke BC
    I have RTW02 to thank for giving me the "hot tip" on this one :evil Bought it from a nice couple in Kelowna who let me have it for a decent price for both parties, this is going to be a stock resto but not concours enough to break the bank.... a rider shall we say.

    Let the fun begin.... caved in tank on this side, anyone have a spare getting in the way? :rofl
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    Luckily it's all there with relatively low mileage, but engine is seized :cry $

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    This better reflects the general overall condition.

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    #1
  2. Skowinski

    Skowinski Eukaryote

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    Those old 450's are cool bikes. I was looking at one, the CB model, a while back, but the owner was just asking too much for it so I walked.
    #2
  3. MacNoob

    MacNoob piney fresh

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    Awesome, I have your bike's little brother - pic is when we dragged it out from behind a shed:

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    #3
  4. anonny

    anonny What could go wrong?

    Joined:
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    What year is that, I notice the paint is the same but my has chrome fenders. Are you doing anything with it? wanna sell the tank :evil:rofl

    Todays chore was to see why the engine was stuck, aaaha just as I expected

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    Top end doesn't look too bad

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    So after a few days soaking the cylinders were reluctant to come off.... time for some friendly persuasion

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    a flawless execution, took some leverage and tapping as the right piston was real bad
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    The helpless victim
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    The piston and cylinder fate will be determined with some measuring, anyone been able to reuse stuff that looked this trashed before?
    #4
  5. MacNoob

    MacNoob piney fresh

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    It's a '71 CL175. ONE of your cylinders is bigger than both of mine together.... I don't think there would be too much parts commonality with your bike! But yes, the tank is in nice shape. I hope to just polish this thing up and not have to repaint much.

    Make sure you come visit at www.hondatwins.net the source of all goodness for these bikes.
    #5
  6. crazydrummerdude

    crazydrummerdude Wacky Bongo Boy

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    El Segundo, CA
    Yep.
    #6
  7. anonny

    anonny What could go wrong?

    Joined:
    Mar 20, 2007
    Oddometer:
    5,763
    Location:
    Beautiful Revelstoke BC
    Rods don't look too bad
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    Piston rings stuck big time, notice the bent oil control ring. Now how do you get the seized rings out? For the first time I broke a ring trying to get it out, this was the "good" piston (read less seized) :D

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    As soon as I can free the rings a friend will do some measuring for me.
    #7
  8. anonny

    anonny What could go wrong?

    Joined:
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    5,763
    Location:
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    Anyone know how to remove the crank drive gear?

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    bit of an odd design. :huh
    #8
  9. briarpatch

    briarpatch Adventurer

    Joined:
    Nov 22, 2008
    Oddometer:
    57
    Location:
    Pineola, Western NC
    It's been a long time since I tore down a CB/CL 450, but I believe you remove the inside snap ring and pull the cover out of the oil sludge trap. Inside is a nut (left hand thread?) removed by a special four pin socket after peening down a security washer. At any rate, pull that snap ring and cover and you can see inside. THANKS - Stan PS Those torsion bar valve springs were WAY cool for an everymans bike back then.
    #9
  10. electroken

    electroken Been here awhile

    Joined:
    Apr 20, 2007
    Oddometer:
    219
    Location:
    CT
    That's a pretty standard centrifugal oil filer design for the early Honda twins.

    Once the snap ring is out, you can thread a long M6 screw into the inner half of the centrifugal filter to help pull it out. A 40 year old o-ring will be fighting you the whole way. Coming up with the special four-fingered tool to remove the filter nut from the crank will be the hard part. There should be a locking washer staked in place under the nut that will have to be flattened before the nut will come off.
    #10
  11. anonny

    anonny What could go wrong?

    Joined:
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    5,763
    Location:
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    You guys were right on the money, inside the centrifuge and no that is not my handy work
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    it gets better
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    oil drain bolt
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    and no again.... I cannot take credit for the alternative tool work.

    But on the brighter side of things
    Tranny looked good, bearings good... whew
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    Shift forks are decent
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    But the biggest prize is the crank looks good, bearings check out and I don't have to worry about sending it out and spending a ton o cash (I remember my Mach 3 costing $1000 for a crank rebuild)

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    #11
  12. electroken

    electroken Been here awhile

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    It appears that a previous owner had 3 tools in the tool box: Vise-grips, a punch, and a big-ass hammer.
    #12
  13. AtLarge

    AtLarge Been here awhile

    Joined:
    Apr 15, 2009
    Oddometer:
    128
    :roflAnd no skills or common sense.
    #13
  14. Skowinski

    Skowinski Eukaryote

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    Looks pretty typical of lots of the work I've seen on used bikes, unfortunately... :lol3
    #14
  15. LasseNC

    LasseNC XSessive!

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    I'd say the small-ends look scored?
    #15
  16. anonny

    anonny What could go wrong?

    Joined:
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    Location:
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    Was just some light rust, here it is after a bit of polishing with scotchbright.... still need to spend a few more minutes with them.

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    Still not wine and roses (yet)

    just 1 rocker is worn, guess it's not a surprise the last owner probably set them with playdo
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    Did a quick cylinder hone but just couldn't get some rust out, closer investigation reveals new pistons and a bore are in my future.... anyone have a source for pistons for these?
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    Last bit of news for the day, the rear brake looked suspicious and every time I pressed the pedal the centerstand would move.... after a lot of persuasion I got the rod out and you can see just how badly it's bent, anyone have a spare?

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    #16
  17. killfile

    killfile 49/50

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    SF, CA

    I get most of my parts locally, or my shop orders bits directly from Honda for me. When there is something I can't get, I turn to Ohio Cycle:
    http://www.ohiocycle.com/

    Enjoy! The 450s are fun!
    #17
  18. JSharp

    JSharp Been here awhile

    Joined:
    Jan 25, 2011
    Oddometer:
    275
    Location:
    East Central IL
    Oil was crappy back in the day that bike was built. Those rockers probably looked like that decades ago even if they were adjusted properly...
    #18
  19. rgears

    rgears Adventurer

    Joined:
    May 24, 2011
    Oddometer:
    44
    Location:
    New Bedford, Ma
    HAHA! I know that pain in the A with a seized cb450 piston! I'm still thinkering with getting my rebuild tweaked just right. A couple of my favorite places for parts are:
    www.dimecitycycles.com for your special little bits and parts you didn't know you needed to buy
    http://stores.rustyriders.net/StoreFront.bok for most of your basic rebuild parts

    I think Dime city also has the oil filter tool for like $8 (maybe a little more.)
    Rusty Riders has the rings, but I think I got my pistons from ebay.
    of course, there's always BikeBandit.com too.

    Good luck! It's a super fun little two-wheeled critter!

    By the by, if you weren't already aware, and I don't know that it's an all the obvious problem before a test run, pay close attention to the shifter rod and a follower that sits just behind the clutch canister. There is a circlip in a ridge at the end of the rod that, if worn, will give hell with shifting. Same with the follower that looks like little more than a washer on a short arm. The washer will bore itself out a bit and make for shifting trouble. I think one or both are what is causing my shifting problem.
    #19
  20. MacNoob

    MacNoob piney fresh

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    #20