1973 CB 750 K Fuel Line

[JRBCB]

Hi Everybody,
I am trying to figure out want exact size of fuel line I need for my 73 CB 750. Suppliers seem to have 2 or 3 I.D. sizes and I am not sure which one to purchase.
Thanks

 

[BAHNST]

1960s to early 1980s (all models) was generally 5.5mm ID.
the OEM line will be a snug fit...probably dont need clamps.....
4into1 lists this as CB750 sizing-you can reference it to a parts diagram if you wish.

https://4into1.com/genuine-honda-black-fuel-line-5-5mm-5-feet/