1973 TX650 front brake parts

[TX650XSR700]

The previous owner of my bike replaced the master cylinder and caliper but left the lines original. I found the upper and lower rubber lines and the steel line from the lower to the caliper on xs650 direct but there are two connection points that I haven’t found. I’d like to replace these as well as the bushings are cracked. Also, I can’t seem to find new copper washers for the banjo fitting at the master cylinder.

 

[Its been a long time]

Copper washers for the banjo fittings are commodity items and available in many places. Sometimes aluminium is used instead of copper, that's fine. I recommend annealing the copper washers before use. That's, heat them to red, air cool or cool in water. Take care not to overheat and melt the washers, they're thin and easily melted. For copper it doesn't matter if you air cool or water cool them, they're still annealed which ever you choose.

Maybe these are the rubber bushes you need? Should available at other XS650 stores.

(Incorrect link is deleted).

 

[DogBunny]

Unless there is something wrong with the copper washers in your picture, they can be annealed and will work just fine.

The rubber grommet you are looking for is part # 306-25881-00-00.
HVC claims to have a reproduction here:
https://hvccycle.net/yamaha-brake-hose-rubber-support-bushing-306-25881-00-00/
which looks nothing at all like the original. But, it's only $6, so give it a shot, and report back if it works or not.
It's also sold in Europe here:
https://yambits.co.uk/306-25881-00-p-162936.html
and a few other places.

The Heiden Tuning grommet previously linked to is for a different brake line clamp, and will not work for you.

 

[willis]

I have the top part sitting on my workbench. Another member asked but ultimately went another direction. I’ll get you a pic of it tomorrow if you are interested.

 

[TX650XSR700]

I have the top part sitting on my workbench. Another member asked but ultimately went another direction. I’ll get you a pic of it tomorrow if you are interested.

I appreciate it but after poking around online a bit I think I’m going to replace the two rubber lines with a single braided stainless line. I just have to figure out what size ends I need.

 

[arcticXS]

I appreciate it but after poking around online a bit I think I’m going to replace the two rubber lines with a single braided stainless line. I just have to figure out what size ends I need.

If the front fender is anything like the RD350, which has the same caliper, you may want to keep the hard brake line ( metal tube) section. There is not much room between the fork slider and the fender ears.

 

[TX650XSR700]

If the front fender is anything like the RD350, which has the same caliper, you may want to keep the hard brake line ( metal tube) section. There is not much room between the fork slider and the fender ears.

I was planning on running a stainless line from the master cylinder to the hard line, only replacing the rubber lines.

 

[willis]

One thing to keep in mind is the brake light switch. On my '75 the factory 2 piece uses a junction block on the front of the headstock that the pressure switch screws into. Moving to a 1 piece line may present an issue there.

 

[Its been a long time]

One thing to keep in mind is the brake light switch. On my '75 the factory 2 piece uses a junction block on the front of the headstock that the pressure switch screws into. Moving to a 1 piece line may present an issue there.

It's possible to use a master cylinder banjo bolt/brake light switch combined. Brembo, Goodridge and probably many others make them.

 

[arcticXS]

One thing to keep in mind is the brake light switch. On my '75 the factory 2 piece uses a junction block on the front of the headstock that the pressure switch screws into. Moving to a 1 piece line may present an issue there.

Since pretty much all oem master cylinders from the 70s and 80s are too big, the best option is finding a 12-13 mm bore master cylinder with an integrated (mechanical) microswitch. This type of switch is actually better, as it switches before there is any pressure at all.
On my 74 RD350A, I replaced the stock master cylinder with a 13 mm Brembo MC. Much better!

 

[TX650XSR700]

Ordered my braided stainless line from HEL Performance and a new hard line and bleeder screw from xs650 direct. I'll see how everything feels before i replace the master cylinder with a new one as its already new.