Author Topic: 78 TX 500 - No Rear Brakes  (Read 6887 times)

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Offline jimmer

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Re: 78 TX 500 - No Rear Brakes
« Reply #15 on: May 16, 2014, 01:21:01 PM »
I now see you are in the U.K. I bet Nige has one for you?   nigecollier       Much closer!

Offline wilberforce

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Re: 78 TX 500 - No Rear Brakes
« Reply #16 on: May 17, 2014, 06:38:32 PM »
I now see you are in the U.K. I bet Nige has one for you?   nigecollier       Much closer!

Cheers.

Yup, I'm in good old blighty as they say.

I've sourced a MC repair kit but on removing it, I snapped on of the mounting bolts.  First time it has been off since Mr Yamaha put it there.  It's with an engineering shop at the moment to try and drill out the broken stud.

I'll make contact with Nige if required.

One of the Boys from the Wall.
XS500E - 1978 vintage
Aprillia Shiver 750 - 3,600 miles.
Moto Guzzi Breva V750ie - 2005 vintage - sold.

Offline wilberforce

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Re: 78 TX 500 - No Rear Brakes
« Reply #17 on: May 22, 2014, 07:41:33 PM »
Got everything sorted but now the brake fluid refuses to flow from the MC into the brake hose.

Ideas please Guys.


I'll dig elsewhere in the meantime.


Cheers.
One of the Boys from the Wall.
XS500E - 1978 vintage
Aprillia Shiver 750 - 3,600 miles.
Moto Guzzi Breva V750ie - 2005 vintage - sold.

Offline guylr

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Re: 78 TX 500 - No Rear Brakes
« Reply #18 on: May 22, 2014, 08:16:04 PM »
Did you bench bleed the "new" MC? If it's already mounted try this. Place a rag below the MC and remove the hose. Cover the MC outlet with your index finger and slowly pump the rear brake lever until you feel the pressure build and fluid spurt around your finger tip. Re-connect the hose at the MC but not at the caliper end. Now, with two fingers pinching the open banjo fitting at the end of the hose do the slow pedal pumping again. "SLOWLY". Eventually you will feel air pressure build and then fluid will reach your fingers after awhile. Do check the reservoir fluid level and top it off as needed so that it doesn't run dry.

Oh, and make sure that you have at least a small amount of free travel at the acuator rod before it starts to move the MC plunger. The plunger needs that to open the bleed orifice in the MC bore. 

Guy
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline wilberforce

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Re: 78 TX 500 - No Rear Brakes
« Reply #19 on: May 22, 2014, 11:05:41 PM »
Cheers Guy.

That's tomorrow evenings job.
One of the Boys from the Wall.
XS500E - 1978 vintage
Aprillia Shiver 750 - 3,600 miles.
Moto Guzzi Breva V750ie - 2005 vintage - sold.

Offline wilberforce

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Re: 78 TX 500 - No Rear Brakes
« Reply #20 on: May 29, 2014, 11:13:05 PM »
Perseverance.

Bled the brakes normally and lo and behold, I've got a back brake.

Now, just got the rest to sort out.
One of the Boys from the Wall.
XS500E - 1978 vintage
Aprillia Shiver 750 - 3,600 miles.
Moto Guzzi Breva V750ie - 2005 vintage - sold.

Offline robdrobd

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Re: 78 TX 500 - No Rear Brakes
« Reply #21 on: June 09, 2014, 02:50:05 PM »
I am posting to this so I can save your pictures for when I do my brakes this month  ;D