Front break line replacement

[Nol_one]

Hi all! I am changing my front break line to a single cable but was confused on the size of the threads going into the caliper. Anyone know? (I have a 1977 cb750k7)

I plan on buying a custom line off of

https://us.helperformance.com/custom-braided-brake-lines

I have an option to do a female swivel end of the line with a detachable npt male end but I only get two size options which are
AN3 female with 1/8” NPT male
OR
AN4 female with 1/8” NPT male

I don’t know out of those which I should get or if I should just get the swivel male attached to the end of the line which has an assortment of sizes.

Any suggestions or advice would be very helpful!

Thank you!!

 

[malr1]

Hello mate, reading this tells me that you don't really know what you are doing. So I would suggest you give the work to someone local who does.
Brakes on the early CB750s were bad anyway and you could make them worse.
I don't want you having an off.
If you have sorted this, how have you got on?

 

[Loki]

The threads on the calipers are metric fine M10 x 1.25 I think but most definately NOT imperial!

Loki