"Fits and Starts" - My '72 CL350
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Thread: "Fits and Starts" - My '72 CL350

  1. #1
    Senior Member bigring911's Avatar
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    "Fits and Starts" - My '72 CL350

    I first introduced myself back in August 2017 but have yet to begin a "project build" page. It's about time I start one so that others can offer suggestions to me and hopefully learn from the mistakes (many) I've made and will likely continue to make.

    I've gotten into motorcycles later in life and cut my teeth on a '76 CB750 that I completely tore apart and rebuilt a few years ago, but never ended up riding. I thought that this "motorcycle thing", as my wife likes to call it, was maybe a passing phase. However, when I saw my little beauty that I have now I couldn't resist to get back into it.

    Life is crazy busy for me so work on the bike comes in fits & starts, so I don't have a ton of time to put towards documenting the entire process but would like to contribute and show a bit of what I'm doing. So it'll be mostly photos with short and to the point commentary and like the title (which might become the CL's new name) suggests, these entries may come in fits & starts too. Let's get to it . . .

    "Fits and Starts" - My '72 CL350-beforetd.jpg

    This is where I stood after a few months with a bit of work. I just couldn't get it running though. What I thought was a engine issue turned out to be an electrical issue - had one coil not firing at all. Took a bit to figure it out and by the time I did it was late in the riding season and decided to tear it all down.

    "Fits and Starts" - My '72 CL350-teardown4.jpg

    "Fits and Starts" - My '72 CL350-teardown6.jpg

    You can see how it was only firing on one cylinder.

    As I tore through the engine I discovered not to judge a book by it's cover. The bike looked pretty darn sweet, but inside was a mess:

    "Fits and Starts" - My '72 CL350-teardown1.jpg

    "Fits and Starts" - My '72 CL350-teardown2.jpg

    "Fits and Starts" - My '72 CL350-teardown3.jpg

    Lots of metal bits and crap throughout. This was just the beginning . . .
    Rothafella likes this.
    '72 CL350

  2. #2
    Senior Member bigring911's Avatar
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    "Fits and Starts" - My '72 CL350-img_0935-copy.jpg

    "Fits and Starts" - My '72 CL350-img_1596-copy.jpg

    "Fits and Starts" - My '72 CL350-img_1598-copy.jpg

    Holes in the case made by the dowel pins being pushed through.

    "Fits and Starts" - My '72 CL350-img_1538-copy.jpg

    Found a wire in the clutch basket mangled up in with the clutch plates.

    "Fits and Starts" - My '72 CL350-img_1582-copy.jpg

    "Fits and Starts" - My '72 CL350-img_1583-copy.jpg

    Rockers and lobes on the cam at pitted and in bad condition. These will be getting sent off to Delta Cam in the near future for resurfacing.
    "Fits and Starts" - My '72 CL350-img_1584-copy.jpg

    "Fits and Starts" - My '72 CL350-img_1585-copy.jpg

    "Fits and Starts" - My '72 CL350-img_1586-copy.jpg

    "Fits and Starts" - My '72 CL350-img_1620-copy.jpg

    "Fits and Starts" - My '72 CL350-img_1621-copy.jpg

    Discovered some dings and scuffs in the pistons. Don't know how this possibly happened!?!! I'm guessing the last person who worked on the engine was using a heavy hand when installing the cylinder head onto the piston and pushed them into the upper case hence the dents on the skirts. Can't explain the damage on the top of the pistons. The cylinder walls who no sign of damage. I've sanded them (pistons) down nice and smooth now.

    "Fits and Starts" - My '72 CL350-img_1624-copy.jpg

    "Fits and Starts" - My '72 CL350-teardown7.jpg

    In pieces . . .
    Last edited by bigring911; 03-05-2019 at 07:04 AM.
    '72 CL350

  3. #3
    Senior Member middletons's Avatar
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    Nice bike! Those pistons and valves appear to be aftermarket.
    1972 CL450
    1972 CL350
    1975 CB360

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  5. #4
    Senior Member bigring911's Avatar
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    Thanks Middletons. Yes, both are/were from Bore Tech.
    '72 CL350

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    Senior Member ancientdad's Avatar
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    And you have the punched-out locating pins for the small ends of the trans shafts... someone didn't pay too much attention when they put this engine together previously. Both of those are repairable - if you had been able to ride it prior to tearing it down, I doubt it would have shifted very well. That thing is a bit of a mess
    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

  7. #6
    Senior Member bigring911's Avatar
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    Quote Originally Posted by ancientdad View Post
    And you have the punched-out locating pins for the small ends of the trans shafts... someone didn't pay too much attention when they put this engine together previously. Both of those are repairable - if you had been able to ride it prior to tearing it down, I doubt it would have shifted very well. That thing is a bit of a mess
    You bet - looks can be deceiving.

    The muffler, though it looked to be in great shape, did have some small holes in the back part of it. Not surprising with it's age. I do feel pretty lucky it was fairly minor as original CL mufflers seem to be hard to come by and when they do they are pretty pricey.

    "Fits and Starts" - My '72 CL350-muff1.jpg

    "Fits and Starts" - My '72 CL350-muff2.jpg

    "Fits and Starts" - My '72 CL350-muff5.jpg

    Most of the backside was littered with pin holes and thin metal. I decided to cut most of the back off.

    "Fits and Starts" - My '72 CL350-muff3.jpg

    Rusted out guts. I didn't know if I could fabricate anything like the original internals without taking the entire muffler apart, so a friend (who also welded it up) suggested using some stainless steel wool to pack the muffler. So that's what I did. I'm not sure how this will affect the carbs and if jetting will be required. I hope not as I plan to run the bike as close to stock as I can. Anyone with experience or thoughts on this??

    "Fits and Starts" - My '72 CL350-mufffinal.jpg

    A bit blurry but you get the idea of the finished project. I did have the bike running before I completely tore it down. It didn't sound too loud for me and seemed to work well. Time will tell.
    '72 CL350

  8. #7
    Supporting Member 05c50's Avatar
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    The WTF twisted wire in the clutch is a clutch plate stopper ring. Nla from Honda, but there's a few around if you google part number 22431-259-000

    ..........Paul
    My "FREE" bike build viewtopic.php?t=14107

  9. #8
    Senior Member bigring911's Avatar
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    Quote Originally Posted by 05c50 View Post
    The WTF twisted wire in the clutch is a clutch plate stopper ring. Nla from Honda, but there's a few around if you google part number 22431-259-000

    ..........Paul
    WTF!?!?! Is that what that is? I don't know how I missed that when looking at the schematic for the clutch basket. Thanks very much for pointing that out 05c50 - I wouldn't have even thought to replace it. I have no clue how it could have gotten so mangled!
    Last edited by bigring911; 03-06-2019 at 02:52 PM.
    '72 CL350

  10. #9
    Supporting Member 05c50's Avatar
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    I've seen a few twisted like that on Yamahas, it's been after someone replaced the clutch. Improper installation is the cause.

    ......Paul
    My "FREE" bike build viewtopic.php?t=14107

  11. #10
    Senior Member Crashoverride's Avatar
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    My CL mufflers had a little hole too, a welder friend cut out the bad part and put in a new piece, been great ever since. I don't think there is any packing inside of it.
    bigring911 likes this.
    Bike Build http://www.hondatwins.net/forums/1-p...rst-timer.html

    1971 CL350 - SUNRUNNER
    Rebuilt Top end with stock Pistons and Rings
    PAMCO + E Start Ignition 4000 Miles on it +
    LED Instrument lights
    Common Motor Rec/Reg
    Common Motor Black bucket + 35w headlight kit
    Custom voltmeter + Tach.
    2009 Versys 650

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