Author Topic: About to start my project, but it doesn’t...  (Read 1037 times)

Offline thomaspigeon

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Re: About to start my project, but it doesn’t...
« Reply #30 on: September 10, 2020, 05:04:44 PM »
I sticked the floats up high to see if I had any leaks and nothing. So it’s definitely float/valve related

Offline Macabethiele

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Re: About to start my project, but it doesn’t...
« Reply #31 on: September 10, 2020, 05:28:29 PM »
Don't you mean you set them lower or do you mean if you pushed the floats up then it closed the valve ?

The lower the float height in the bowl the greater the leverage between the Tab and the float needle so it shuts off earlier?

When setting my float heights with the Carbs upside down the float Tab would be just  touching the sprung part of the needle valve without depressing it. I then measured the gap between the Carb body and the bottom of the float that on mine were flat - as per NJ's pictures in her float height setting guide.

Looking at your upside down picture the spring clips look the wrong way up to me ? I'm an amature so listen to NJ.
« Last Edit: September 10, 2020, 05:36:14 PM by Macabethiele »
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Offline Nurse Julie

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Re: About to start my project, but it doesn’t...
« Reply #32 on: September 10, 2020, 05:39:03 PM »
I can see by your photo #1 that the floats aren't level overall and # 2 from the left shows the float arm is bent as the floats are sitting at an angle. As far as the float tang is concerned, remove the floats and flatten the tang so it is flat, its got that hook effect to it at the moment. As Ted has just said, when the floats are fitted, you pull the tang up higher to reduce float height, and push it down further to increase float height. The floats are on the correct way up. The spring clips are the correct way up.
« Last Edit: September 10, 2020, 05:41:30 PM by Nurse Julie »
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Offline thomaspigeon

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Re: About to start my project, but it doesn’t...
« Reply #33 on: September 10, 2020, 08:39:23 PM »
Alright after a day of fight. I can say it, no more overflow!

I had to raise some float to 23mm. I don’t know if some spring got more resistance or anything else but it works...

I’ve put everything back on try the spark and.... no spark, I’ve seen a live wire grounding from the electronic ignition... it might be blown inside now.

Reading on the coils after the plug caps is 5000ohms, weird. I have to investigate this now  :-[ :-[ :-[

Offline Nurse Julie

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Re: About to start my project, but it doesn’t...
« Reply #34 on: September 10, 2020, 08:48:24 PM »
Alright after a day of fight. I can say it, no more overflow!

I had to raise some float to 23mm. I don’t know if some spring got more resistance or anything else but it works...

I’ve put everything back on try the spark and.... no spark, I’ve seen a live wire grounding from the electronic ignition... it might be blown inside now.

Reading on the coils after the plug caps is 5000ohms, weird. I have to investigate this now  :-[ :-[ :-[

Well done on the carbs. Nothing worse than carbs with an Incontinence problem 😁😁😁😁
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Offline thomaspigeon

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Re: About to start my project, but it doesn%u2019t...
« Reply #35 on: September 10, 2020, 10:56:57 PM »
Hahaha thanks Julie!

Till the next episode... :D
« Last Edit: September 10, 2020, 10:58:33 PM by thomaspigeon »

Offline robvangulik

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Re: About to start my project, but it doesn’t...
« Reply #36 on: September 11, 2020, 12:00:14 AM »
I'm just trying to get my head round your photos, something doesn't look right 🤔🤔🤔 I will find a float in a bit and have a look.
Also, if you have fitted all new brass ware, unless they are genuine Honda, there is no guarantee the float vales are shutting fully in the seat.
Maybe that the "hinge " is on the bottom instead of the topside?

Aand there was another page my PC only showed after posting. Sorry.
« Last Edit: September 11, 2020, 12:03:04 AM by robvangulik »

Offline paulbaker1954

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Re: About to start my project, but it doesn’t...
« Reply #37 on: September 12, 2020, 02:20:39 PM »
Alright after a day of fight. I can say it, no more overflow!

I had to raise some float to 23mm. I don’t know if some spring got more resistance or anything else but it works...

I’ve put everything back on try the spark and.... no spark, I’ve seen a live wire grounding from the electronic ignition... it might be blown inside now.

Reading on the coils after the plug caps is 5000ohms, weird. I have to investigate this now  :-[ :-[ :-[

What brand of electronic ignition is it?
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Offline thomaspigeon

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Re: About to start my project, but it doesn’t...
« Reply #38 on: September 14, 2020, 05:04:12 PM »
Hey I don’t really know the name of the electronic ignition,

I bought it through David Silver. It’s a Japanese make : https://www.cmsnl.com/honda-cb750k4-four-1974-usa_model482/ignition-assyelectronic-kokusan_03020300505/#.X1-ToiV4WEc

It looks like it’s fried, I plugged a 12V light on the yellow and blue leads and nothing. I probably made a short with that live wire  :-\


Offline AshimotoK0

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Re: About to start my project, but it doesn’t...
« Reply #39 on: September 14, 2020, 06:13:04 PM »
Hey I don’t really know the name of the electronic ignition,

I bought it through David Silver. It’s a Japanese make : https://www.cmsnl.com/honda-cb750k4-four-1974-usa_model482/ignition-assyelectronic-kokusan_03020300505/#.X1-ToiV4WEc

It looks like it’s fried, I plugged a 12V light on the yellow and blue leads and nothing. I probably made a short with that live wire  :-\

I would have serious concerns about having such delicate and unpotted, not even conformally coated,  electronics (on initial viewing from web photo)  in the area normally occupied by the points plate. Even in the mid 1970's Boyer Bransden were savvy enough to have a remotely mounted and full potted electronics module with just inductors on the points 'plate' PCB.

What do other electronics guys on here think? The use of electrolyic capacitors in that location (which gets quite hot ... is also very questionable IMHO)
« Last Edit: September 14, 2020, 06:30:10 PM by AshimotoK0 »
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Offline SteveD CB500K0

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Re: About to start my project, but it doesn’t...
« Reply #40 on: September 14, 2020, 07:00:05 PM »
Conformal coating.

Takes me back…


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Offline thomaspigeon

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Re: About to start my project, but it doesn’t...
« Reply #41 on: September 21, 2020, 10:07:38 PM »
Hello everyone,

So I need to change the name of this topic as my project started!  ;D

For some reasons the electronic ignition came back to life...

Now, it's running really poorly that was kind of expected. When I open the choke fully it dies, I guess it's too lean so I'll have to change the idling and main jets. I didn't make the baffle yet and I still didn't receive my new pods so I'll have to wait for this being done. I found it kind of unresponsive/delayed when twisting the throttle.

Also, it's kind of ticking on the top engine so I'll have to check those valves.

When I checked the spark, it wasn't huge either...

You can watch/ hear it below :
https://www.youtube.com/watch?v=af05AX-ZU94&ab_channel=TheTallTom

https://www.youtube.com/watch?v=tm86UACgQyk&ab_channel=TheTallTom

Let me know what you guys think
Thanks

Tom

Offline Nurse Julie

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Re: About to start my project, but it doesn’t...
« Reply #42 on: September 21, 2020, 10:30:50 PM »
That top end ticking sounds like a leaky exhaust manifold gasket.
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Offline thomaspigeon

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Re: About to start my project, but it doesn’t...
« Reply #43 on: September 21, 2020, 10:52:24 PM »
That’s a good news, I’ve got a set of new ones!!

Offline SteveD CB500K0

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Re: About to start my project, but it doesn’t...
« Reply #44 on: September 22, 2020, 06:53:08 AM »
You can change the name of your thread.

Go to the first post and edit it there.
It won’t change on the existing replies but will on all future ones.

Steve


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