Author Topic: 750F1 Pad & piston jammed on front brake  (Read 1033 times)

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Offline BenelliSEI

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Re: 750F1 Pad & piston jammed on front brake
« Reply #25 on: October 21, 2023, 07:09:15 AM »
+2! Here are the pliers you must have. Order two sets so when the tip finally snaps off the first set, you don’t get stopped in your tracks! Cheap sh*t, but they work.

This set is from Vintagecb750.com

Offline Kelly E

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Re: 750F1 Pad & piston jammed on front brake
« Reply #26 on: October 21, 2023, 03:57:03 PM »
+2! Here are the pliers you must have. Order two sets so when the tip finally snaps off the first set, you don’t get stopped in your tracks! Cheap sh*t, but they work.

This set is from Vintagecb750.com

Definitely always have a backup set of those I've on my 3rd set.
Never Give Up - Never Surrender

The Rust Bros. Garage Collection
1974 Honda CB 550 K0                                            1971 MGB/GT
1975 Honda CB 400F Super Sport                          1972 MGB/GT
1977 Kawasaki KZ 1000 LTD                                   1985 GMC S15
1978 Kawasaki KL 250
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda VF 700S Sabre
1984 Honda VF 1000F Interceptor
1990 Moto Guzzi 1000 Le Mans
1994 Kawasaki Concours ZG 1000A9
2005 Harley Davidson Fat Boy

Offline RAFster122s

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Re: 750F1 Pad & piston jammed on front brake
« Reply #27 on: October 21, 2023, 08:26:53 PM »
It is a question of metallurgy and poor heat treat...
If they were made with good metal and given a good heat treat they would last, but then the company would have to charge a ton for them. Sometimes I don't mind paying for a good quality tool knowing I won't have to buy it again as long as I don't lose it or abuse it.
David- back in the desert SW!

Offline scunny

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Re: 750F1 Pad & piston jammed on front brake
« Reply #28 on: October 21, 2023, 11:24:37 PM »
who loses tools?
I will now go into a corner and cry.
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Offline BenelliSEI

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Re: 750F1 Pad & piston jammed on front brake
« Reply #29 on: October 22, 2023, 07:53:36 AM »
It is a question of metallurgy and poor heat treat...
If they were made with good metal and given a good heat treat they would last, but then the company would have to charge a ton for them. Sometimes I don't mind paying for a good quality tool knowing I won't have to buy it again as long as I don't lose it or abuse it.

Mostly the problem is those clips are often seriously stuck in place and the pin ends are extremely small…….

Offline Kelly E

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Re: 750F1 Pad & piston jammed on front brake
« Reply #30 on: October 22, 2023, 08:55:04 AM »
Now when the MC snap rings are really stuck I use a pick to try and to get each hole on the snap ring to move some before I get out the snap ring pliers.
Never Give Up - Never Surrender

The Rust Bros. Garage Collection
1974 Honda CB 550 K0                                            1971 MGB/GT
1975 Honda CB 400F Super Sport                          1972 MGB/GT
1977 Kawasaki KZ 1000 LTD                                   1985 GMC S15
1978 Kawasaki KL 250
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda VF 700S Sabre
1984 Honda VF 1000F Interceptor
1990 Moto Guzzi 1000 Le Mans
1994 Kawasaki Concours ZG 1000A9
2005 Harley Davidson Fat Boy

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: 750F1 Pad & piston jammed on front brake
« Reply #31 on: October 22, 2023, 09:04:23 AM »
Soak it with strong vinegar to help dissolve the rust
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Don R

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Re: 750F1 Pad & piston jammed on front brake
« Reply #32 on: October 23, 2023, 04:23:44 PM »
 Cleaning vinegar is stronger, as is week killer vinegar.
  I just thinned a set of snap ring pliers to fit in the master cylinder. My set had a pair that matched so I sacrificed them to make one more usable.
  Some of the F brakes have an o ring on the OD of the piston side pad. I assume it's to keep dirt out. I removed one of mine, the pad seemed to hang up because it was there. I also got a new aftermarket piston that hung up in the bore of two different calipers, I spent a few minutes polishing it with red Scotchbrite pad while talking to a neighbor. Now it slides in and falls out with no seal.
« Last Edit: October 23, 2023, 04:48:16 PM by Don R »
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Offline Kelly E

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Re: 750F1 Pad & piston jammed on front brake
« Reply #33 on: October 23, 2023, 05:24:44 PM »
  I just thinned a set of snap ring pliers to fit in the master cylinder. My set had a pair that matched so I sacrificed them to make one more usable.

I thinned a set of long handle 90° needle nose pliers and ground tips into them to get out seized fork slider snap rings. They can be every bit as hard to get out as the MC snap rings. The next MC I take apart I'll get to try and see if my new Kowa snap ring pliers will fit down in there.
Never Give Up - Never Surrender

The Rust Bros. Garage Collection
1974 Honda CB 550 K0                                            1971 MGB/GT
1975 Honda CB 400F Super Sport                          1972 MGB/GT
1977 Kawasaki KZ 1000 LTD                                   1985 GMC S15
1978 Kawasaki KL 250
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda VF 700S Sabre
1984 Honda VF 1000F Interceptor
1990 Moto Guzzi 1000 Le Mans
1994 Kawasaki Concours ZG 1000A9
2005 Harley Davidson Fat Boy