1971 CB175 (K5) - Rebuilding Miss Daisy - Page 3
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Thread: 1971 CB175 (K5) - Rebuilding Miss Daisy

  1. #21
    Supporting Member Quixote's Avatar
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    The left carburetor was a different story... installed on the bike I squeezed onto the petrified plastic fuel line and gave a tug to remove it off the stand pipe... no go.. so then using a twisting action and pulling... yup you guessed it.. I removed the standpipe haha... will have to fix that (lesson learned). The photo shows the line installed, but you can see where I grabbed the plastic line... will use a razor blade next time

    I noticed the choke linkage was backed off. When I flipped the choke lever there was no choke appearing in view.. only the pin that would attach to the choke valve came into view... hmmm that loose linkage me had think the choke valve had released (or was removed by the PO)... if it released its next stop would be the intake valve. The floats were damaged. The fuel bowl area was not as nice as the right side carburetor.
    Attached Thumbnails Attached Thumbnails 1971 CB175 (K5) - Rebuilding Miss Daisy-lf-carb-drain.jpg   1971 CB175 (K5) - Rebuilding Miss Daisy-lf-carb-loose.jpg   1971 CB175 (K5) - Rebuilding Miss Daisy-lf-float1.jpg   1971 CB175 (K5) - Rebuilding Miss Daisy-lf-float2.jpg   1971 CB175 (K5) - Rebuilding Miss Daisy-fl-float3.jpg  

    - Jack -

    "Sometimes the fastest way to get there is to go slow
    And sometimes if you wanna hold on you got to let go"
    Count to Ten/Tina Dico

    1971 CB175 (K5) - Rebuilding Miss Daisy
    http://www.hondatwins.net/forums/1-p...n-rebuild.html

  2. #22
    Supporting Member Quixote's Avatar
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    It was time to remove the engine from the frame. I lowered the bike on its side with the engine being supported by some pads I use when crawling under cars. It looked like this would make it easy to remove the engine by one person. It was.

    I was about to start releasing the frame/engine mount bolts I noticed the oil drain plug had what looked like some sort of pink putty around the base. I unscrewed the oil drain plug, for a closer look and this was found laying in the bottom of the plug. At first, thought it was a gear tooth... but nope (wrong radii), it's a broken off finger/tab from the magneto-rotor. If you recall the cracked ones I showed earlier, this is one that was broken off and laying in the engine :/ I haven't determined was that pink stuff was, but I am replacing the plug from previous PO damage in their attempt to remove it.
    Attached Thumbnails Attached Thumbnails 1971 CB175 (K5) - Rebuilding Miss Daisy-finger-tab.jpg  
    - Jack -

    "Sometimes the fastest way to get there is to go slow
    And sometimes if you wanna hold on you got to let go"
    Count to Ten/Tina Dico

    1971 CB175 (K5) - Rebuilding Miss Daisy
    http://www.hondatwins.net/forums/1-p...n-rebuild.html

  3. #23
    Supporting Member Quixote's Avatar
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    More to follow tomorrow

    Cheers
    - Jack -

    "Sometimes the fastest way to get there is to go slow
    And sometimes if you wanna hold on you got to let go"
    Count to Ten/Tina Dico

    1971 CB175 (K5) - Rebuilding Miss Daisy
    http://www.hondatwins.net/forums/1-p...n-rebuild.html

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  5. #24
    Senior Member Simo's Avatar
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    Pink gunkay well be a home made gasket, that stuff kills these motors

  6. #25
    Supporting Member Quixote's Avatar
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    Quote Originally Posted by Simo View Post
    Pink gunkay well be a home made gasket, that stuff kills these motors
    Absolutley !!

    I forgot to mention after I removed the goo from the spark plugs, the left spark plug had "zero" gap clearance, and the right one had .002" ahhahahhah

    Here is a picture I took this morning of the rotor looking at it with the three staked screws holding the starter mechanism removed (they were very tight, as they should have been), for a little closer at the tabs/fingers... you can see the missing tab/finger (... the broken off piece fits perfectly in its place). Turns out the remaining five tabs are cracked. Cruising Ebay etc, everything I viewed that was in "used condition" appear to have cracked tabs/fingers. There is one NOS out there but will leave that for the folks who fully restore and sell. I have been reviewing alternatives for about a month or so.
    Attached Thumbnails Attached Thumbnails 1971 CB175 (K5) - Rebuilding Miss Daisy-rotor.jpg  
    Last edited by Quixote; 01-23-2015 at 09:46 AM.
    - Jack -

    "Sometimes the fastest way to get there is to go slow
    And sometimes if you wanna hold on you got to let go"
    Count to Ten/Tina Dico

    1971 CB175 (K5) - Rebuilding Miss Daisy
    http://www.hondatwins.net/forums/1-p...n-rebuild.html

  7. #26
    Supporting Member Quixote's Avatar
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    Some of the alternatives I've reviewed for supplying higher than stock watt output, included:

    - Powerdynamo for Honda CB175
    This appears to use a field controlled alternator and adds an electronic crankshaft sensor for ignition timing. It has about a 150w output; looking similar to a Honda 400F / 500F electrical power system.. dunno.. the down side is the electric start has to be removed. Kick start lovers might be interested in something like this.. not for me though. The cost appears to be a tad higher than a Bore Tech ignition system, but might be worth it for some folks.

    - Amazon.com: DB Electrical APM0008 Alternator for John Deere Utility Tractor for Models 670, 770, 790, 870, 970, 990, 1070 and 2305: Automotive
    This is a 3 phase (IIRC 300w) permanent magnetic alternator... down side is the excess power is being absorbed (wasted). This has been used as a back-up electrical source with experimental aircraft builders with good success. I have no idea what the break-in voltage rpm or rotating rpm limitations are. There is a two wire (single phase) version of this also. This link will show a typical installation on an experimental aircraft using a corvair engine... http://www.n56ml.com/corvair/dynamo.html

    Am still looking at other alternatives.. no rush for me If there's other possible/viable options/alternatives your aware of.. yell!
    Last edited by Quixote; 01-23-2015 at 10:49 AM.
    - Jack -

    "Sometimes the fastest way to get there is to go slow
    And sometimes if you wanna hold on you got to let go"
    Count to Ten/Tina Dico

    1971 CB175 (K5) - Rebuilding Miss Daisy
    http://www.hondatwins.net/forums/1-p...n-rebuild.html

  8. #27
    Supporting Member Quixote's Avatar
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    Engine dis-assembly

    NOTE: When the frame was upside down with the engine installed, I was able to break free all but three case half bolts on the lower case... the other three were blocked by the frame. With the frame bracing the engine, this was easily accomplished.

    Removed the cam chain, cam bosses and cam. These are in great shape.. no oil starvation observed... this was a good thing. Then removed the cylinder head and cylinder assemblies.

    The right hand piston skirt was badly scrapped below the oil scavenger rings. The piston was tilted over to one side. This was caused by either something getting caught between the bottom of the skirt, or the PO had this apart and banged the skirt (hard) into the upper case, as the bottom of the skirt was cracked and dented in such a way that forced the piston to tilt over in the cylinder liner... I think it was the latter. The inward dent/crack is easy to see in the photo, but the corners of the dented/cracked area is pushed outward... hard to see. With the piston rings removed, the piston was difficult to put back into the cylinder (because of the outward bends). Liner scrapes are easily felt by fingernail. Ouchie !
    Attached Thumbnails Attached Thumbnails 1971 CB175 (K5) - Rebuilding Miss Daisy-rt-piston2.jpg   1971 CB175 (K5) - Rebuilding Miss Daisy-rt-piston1.jpg  
    Last edited by Quixote; 02-02-2015 at 09:21 PM.
    - Jack -

    "Sometimes the fastest way to get there is to go slow
    And sometimes if you wanna hold on you got to let go"
    Count to Ten/Tina Dico

    1971 CB175 (K5) - Rebuilding Miss Daisy
    http://www.hondatwins.net/forums/1-p...n-rebuild.html

  9. #28
    Supporting Member Quixote's Avatar
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    The left piston crown (top) looked like an itty bitty ball peen taken to it. The combustion chamber was badly cut, gouged etc.. yup me thinks this is where the missing choke valve assembly visited.

    NOTE: The combustion chamber was full of goo from the previous pre-soak, and I did not immediatley notice the outer part of the choke valve was wedged into the combustion chamber and the damage that it caused. A week or so later I was showing my youngest son and his wife where I was with the project. My daughter-in-law actually spotted the choke valve assembly stuck in the combustion chamber, and she knew exactly what it was.. she grew up rebuilding small motorcycles with her dad.

    The center section (flap valve) of the choke valve was not found in the combustion chamber, but there is a noisy rattle when I shake the left exhaust pipe around.

    PS: Sry ..I did not take any pictures when combustion chamber damaged area, only when I repaired it.. will post that later in the log

    Cheers
    Attached Thumbnails Attached Thumbnails 1971 CB175 (K5) - Rebuilding Miss Daisy-lf-piston1.jpg   1971 CB175 (K5) - Rebuilding Miss Daisy-choke-valve-2.jpg   1971 CB175 (K5) - Rebuilding Miss Daisy-choke-valve-1.jpg  
    Last edited by Quixote; 02-02-2015 at 09:24 PM.
    - Jack -

    "Sometimes the fastest way to get there is to go slow
    And sometimes if you wanna hold on you got to let go"
    Count to Ten/Tina Dico

    1971 CB175 (K5) - Rebuilding Miss Daisy
    http://www.hondatwins.net/forums/1-p...n-rebuild.html

  10. #29
    Senior Member Simo's Avatar
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    You could expand your rotor search to include any of the model variance ca,cb,cl,cd etc 175's and cb/cl200's. You'll need to get maching advancers or possibly remark the rotor as the timing marks shift through models. If you look for a used model that was kicker only (sl ,some cl, some ca,some cd) they will have the tabs but they won't have the stress cranks

  11. #30
    Supporting Member Quixote's Avatar
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    Quote Originally Posted by Simo View Post
    You could expand your rotor search to include any of the model variance ca,cb,cl,cd etc 175's and cb/cl200's. You'll need to get maching advancers or possibly remark the rotor as the timing marks shift through models. If you look for a used model that was kicker only (sl ,some cl, some ca,some cd) they will have the tabs but they won't have the stress cranks
    I did not think of the kicker bikes .. furthest thing from my mind... will look around .. Thanks!
    - Jack -

    "Sometimes the fastest way to get there is to go slow
    And sometimes if you wanna hold on you got to let go"
    Count to Ten/Tina Dico

    1971 CB175 (K5) - Rebuilding Miss Daisy
    http://www.hondatwins.net/forums/1-p...n-rebuild.html

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