Author Topic: thread sizes on CB750 oil tank?  (Read 1722 times)

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Offline lucky

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thread sizes on CB750 oil tank?
« on: July 19, 2012, 09:58:01 AM »
I would like to know what the thread sizes on the oil tank are for the oil hoses.
Does anyone know what they are?
Metric?, SAE?, left ,right hand threads?

Offline 70CB750

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Re: thread sizes on CB750 oil tank?
« Reply #1 on: July 19, 2012, 10:27:55 AM »
They are right hand and Japanese which I think is a variation of British.

Offline lucky

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Re: thread sizes on CB750 oil tank?
« Reply #2 on: July 19, 2012, 11:26:56 AM »
They are right hand and Japanese which I think is a variation of British.

What was the use of this post??? Do you think it was funny??

Offline 70CB750

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Re: thread sizes on CB750 oil tank?
« Reply #3 on: July 19, 2012, 01:40:59 PM »
Ok, slower this time.

Threads on the oil tank are right hand and Japanese thread standard which is to certain extent related to British thread standard. I would recommend to get a book from technical library and study a bit.

Offline lucky

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Re: thread sizes on CB750 oil tank?
« Reply #4 on: July 20, 2012, 02:58:00 PM »
Ok, slower this time.

Threads on the oil tank are right hand and Japanese thread standard which is to certain extent related to British thread standard. I would recommend to get a book from technical library and study a bit.

I like specific facts. For instance the fittings are metric.
The size is ......????? They are 17mm and 1.25 threads or 1.50 threads etc.,.
Specific facts.  IJS or ISO threads?  See what I need?

You do not say how the threads are related to british standards.
And I do not need to know. Whitworth #1 or #2, I do not care.

Offline 70CB750

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Re: thread sizes on CB750 oil tank?
« Reply #5 on: July 20, 2012, 03:17:46 PM »
You are such a smart fellow, why don't you do your own research?

72500john

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Re: thread sizes on CB750 oil tank?
« Reply #6 on: July 20, 2012, 03:55:13 PM »

Offline lucky

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Re: thread sizes on CB750 oil tank?
« Reply #7 on: July 20, 2012, 07:13:12 PM »
Thanks 72500JOHN!!

Offline 70CB750

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Re: thread sizes on CB750 oil tank?
« Reply #8 on: July 24, 2012, 05:21:44 AM »
I asked the right people:

Both threads are 1.5mm pitch 60 degree ISO - fittings DIN 3902 should work.

Offline lucky

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Re: thread sizes on CB750 oil tank?
« Reply #9 on: July 24, 2012, 10:23:11 AM »
I asked the right people:

Both threads are 1.5mm pitch 60 degree ISO - fittings DIN 3902 should work.

Thanks!! for that info and the time it took to get it. I appreciate it.

Offline 70CB750

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Re: thread sizes on CB750 oil tank?
« Reply #10 on: July 24, 2012, 10:36:12 AM »
You are welcome.

bollingball

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Re: thread sizes on CB750 oil tank?
« Reply #11 on: July 24, 2012, 10:43:10 AM »
Ok, slower this time.

Threads on the oil tank are right hand and Japanese thread standard which is to certain extent related to British thread standard. I would recommend to get a book from technical library and study a bit.

I like specific facts. For instance the fittings are metric.
The size is ......????? They are 17mm and 1.25 threads or 1.50 threads etc.,.
Specific facts.  IJS or ISO threads?  See what I need?

You do not say how the threads are related to british standards.
And I do not need to know. Whitworth #1 or #2, I do not care.

Lucky is it IJS or JIS??I don't know I just want to be SPECIFIC
Ken

Offline lucky

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Re: thread sizes on CB750 oil tank?
« Reply #12 on: July 24, 2012, 11:29:50 PM »
Ok, slower this time.

Threads on the oil tank are right hand and Japanese thread standard which is to certain extent related to British thread standard. I would recommend to get a book from technical library and study a bit.

I like specific facts. For instance the fittings are metric.
The size is ......????? They are 17mm and 1.25 threads or 1.50 threads etc.,.
Specific facts.  IJS or ISO threads?  See what I need?

You do not say how the threads are related to british standards.
And I do not need to know. Whitworth #1 or #2, I do not care.

Lucky is it IJS or JIS??I don't know I just want to be SPECIFIC
Ken

Well if ISO is (international Standards Organization)
Then IJS is (International Japanese Standard)???

Not sure. I forget now. Japanese International Standard sounds good too.

Hold on I found it again...

When the first Hondas were imported to the United states the fine thread carburator screws
were IJS(not to be confused with raised dot JIS screws and tools 1985) until 1964-65 and what happened was that the threads were changed to the ISO style and were not marked.
Then people in the US started mixing these screws up and fuel leaked out of some carbs and caused fires.
So from then on all carb screws on all Japanese motorcycles and cars have the punch mark on the screw to identify that screw as a ISO thread screw. Go look at your bike.
Almost none of the IJS screws exist anymore except on very old motorcycles.
« Last Edit: July 24, 2012, 11:34:07 PM by lucky »