Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: Dan on April 12, 2015, 07:44:20 PM

Title: Front brake pipe thread
Post by: Dan on April 12, 2015, 07:44:20 PM

Can anyone please confirm what the thread is on the solid front brake pipe male connection - where the bottom hose connects to the solid pipe at the caliper.

I think it is M10x1 but would like confirmation before I order a custom hose.

Thanks in advance

Title: Re: Front brake pipe thread
Post by: Trigger on April 12, 2015, 08:10:40 PM

It is m10x1 but, as long as no one has re-cut the thread  ;)

Title: Re: Front brake pipe thread
Post by: mike the bike on April 12, 2015, 08:25:25 PM

I suggest using PTFE tape on the threads so it doesn't seize up.

Title: Re: Front brake pipe thread
Post by: Dan on April 12, 2015, 09:01:01 PM

Thanks 👍

Title: Re: Front brake pipe thread
Post by: Bryanj on April 13, 2015, 09:34:03 AM

BE CAREFULL ordering the hose as most of the Venhill fittings need a pipe nut with no thread at the end and a single flare not a double flare---Just specifying the correct thread does not always get you what you want. I can supply pics and pipe nuts if you wish

Title: Re: Front brake pipe thread
Post by: Dan on April 14, 2015, 11:56:44 PM

Thanks Bryan
I was thinking of ordering a hose from HEL. It will go straight from a Suzuki (!) master cylinder to the solid pipe that comes off the caliper, and delete the brake switch on the bottom yoke. Any advice gratefully received.

Title: Re: Front brake pipe thread
Post by: Trigger on April 15, 2015, 08:53:29 AM

Quote from: Dan on April 14, 2015, 11:56:44 PM

Thanks Bryan
I was thinking of ordering a hose from HEL. It will go straight from a Suzuki (!) master cylinder to the solid pipe that comes off the caliper, and delete the brake switch on the bottom yoke. Any advice gratefully received.

Why not go straight from the master to the caliper ?

Title: Re: Front brake pipe thread
Post by: Dan on April 15, 2015, 11:35:40 PM

That is an option but I'd like to maintain at least some originality. I think it would look better with the steel pipe too.

The reason for wanting to delete the original brake light switch is to make room to move the headlight back and down a bit. Sorry to any purists who read this :-)

Title: Re: Front brake pipe thread
Post by: Dan on May 07, 2015, 01:47:39 PM

Just a quick update for anyone considering buying a custom brake hose.

The thread size of the bottom hose/caliper pipe connections is M10x1.25 and is the standard thread  used by Honda on the CB (400 and 750) during the 1970s.

I would also recommend the services of HEL Performance for their advice and fast turn around. My hose arrived less than 24 hours after ordering online.