ISO PB36/37 (CT70 78-81) Carb for Parts

Discussion in 'Wanted/Looking For' started by Dezdan, Oct 14, 2017.

  1. Dezdan

    Dezdan Well-Known Member

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    Looking for the top half of a PB36 or PB37 for some parts. Mainly I am looking for the spring that sits between the choke cap and the choke lever. Additionally, if available, the choke bar - mine is functional, but damaged.

    ChokeSpring78.jpg
     
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  3. OLD CT

    OLD CT Well-Known Member

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    Wonder if the parts would interchange with a new pz19 on ebay for $11.16 shipped from Daytona Beach. I would take the gamble.
     
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  4. Dezdan

    Dezdan Well-Known Member

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    I had wondered about that but would use that as my very last resort. However, I just scored a mostly complete PB37 on FleaBay that was incorrectly listed for a 72' for cheap - dude wanted $119, I offered $25 and he accepted with no hesitation. Go figure, I post a wanted ad and I find what I am looking for elsewhere... Never fails!
     
  5. kirrbby

    kirrbby Well-Known Member

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    Lol.

    Funny that he accepted that offer...funny also, that you offered it.
     
  6. racerx

    racerx Administrator
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    Murphy isn't necessarily your adversary.;)

    Here's the only new, OEM, setup I could find.

    At this price level, I'd take a chance on a PZ19, as Pat suggested.
     
  7. OLD CT

    OLD CT Well-Known Member

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    I did repair a 82 carb, that the choke wouldn't close with pz19 parts.
     
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  8. Dezdan

    Dezdan Well-Known Member

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    Thanks for that, I had forgotten to check Beatrice! Yeah, next step would be a PZ19 if the OEM carb ($25 shipped) doesn't work out - I don't mind having spare carb parts around either way.

    I just noticed that the carb I bought has two screws holding the butterfly on unlike the one woodscrew ((n)) holding my current butterfly, we'll find out when it shows up next week what model it is...
     

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  9. andrewdell19

    andrewdell19 Active Member

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    Goodness $119 asking price for a carb? Thats like the one guy asking $5000 on ebay for a ct70 roller.

    I have a carb from a 77 that i wont be using but apparently that wouldn't work for you. Its probably the same carb that fit the k0, k1, k2, k3 etc.
     
  10. Dezdan

    Dezdan Well-Known Member

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    Yeah, not sure what model number a 77 would be, but it should have a square bowl like previous models.

    As luck would have it, I received the ebay carb, and right off the bat I noticed how big it was... 100% identical to my PB36, just larger! Turns out it is a 140cc carb off of a Kawasaki. :( PZ19 time for parts...
     
  11. Dezdan

    Dezdan Well-Known Member

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    The later model carbs seem to sell for more, idk. Here is another forsale for $119 that needs some help: Vintage 1978 Honda CT70 Trail 70 Keihin Carburetor PB 37
     
  12. Dezdan

    Dezdan Well-Known Member

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    So late last night I remembered that one of the bikes I picked up years ago had a PZ19 carb on it. I took it apart and it is almost a direct fit for the PB36. The PZ19 choke spindle was 3 to 4mm shorter then the Keihin, which concerns me for long term use, but still worked. The choke plate was a different shape and would not work. The choke spindle return spring, whether or not it was the correct size/shape, works perfect. The spring and spindle were all I needed, the choke lever and cap were replaced with Honda parts. I'll still source a PB36/37 to have for parts and eventually replace the PZ19 spindle with an OEM spindle.
     
  13. allenp42

    allenp42 Active Member

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    I think I found one. I trashed the carb body last week, but just remembered I extracted a few parts. Pretty sure it was a PB38 but I could be wrong.

    The dimensions on the choke bar are:

    Shaft ~58.75mm, total length 60.75mm

    The spring is missing a tab, about 8mm dia.

    Have the screw for the choke flap as well. Drop me a PM and I'll send 'em your way.

    Allen
     

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  14. Dezdan

    Dezdan Well-Known Member

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    Dang I dropped the ball on this one! PM being sent Allen!
     
  15. allenp42

    allenp42 Active Member

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    Just found the bag. For a moment I thought they went in file 13. PM sent
     

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