Question about 1990 Yamaha XJ 900 F

2 Answers

Removing pistons need to replace seals in calliper. how do I get the pistons out?

Posted by on


2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer


I took pistons out by compressed air. I have a small air compressor and I fitted a air hose pipe of the compressor to the brake fluid connection hole. It was necessary to "seal" the connection to push rags around the "fitting".

Lock one of the pistons in caliber with some kind of pressing tool. Other piston jumps out. Then clean the piston and replace seals. Then push it back in the caliber and lock it with pressing tool. Now it is others piston's turn to jump out.

I'am from finland and english is not my morher tongue, so I hope you despite all understood what I tried to say.

Best luck


Posted on May 24, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 74 Answers

Not sure what you mean by OUT, but you can use the brake to make them come out, or you can you a U clamp to squeese them in. Make sure that you remove the calliper first.

Posted on Jan 16, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Hydraulic brakes stoped working after blown steering seel? Need help

If there's no pressure on your brake pedal it's due to a failure somewhere in the braking system. I can't see any connection between a steering problem and a braking problem.

Most cars have a split-circuit braking system. That is, the front left wheel is on the same line as the rear right wheel. The front right wheel is on the same line as the rear left wheel.

This is just a safety feature: If one brake line loses pressure, the other line still works and you retain 50% of your braking power.

check the level of your brake fluid. If the level has dropped it indicates a leak somewhere. Though be aware that it is possible NOT to lose brake fluid whilst having soft brakes..

Brake pressure is lost due to either a faulty brake master cylinder or a leak at one of the wheels.

Remove each tyre in turn and inspect the piston on the brake calliper. If there's slight wetness caused by brake fluid that indicates a seal (around the brake piston) has failed and is drawing in air.

There's no need to replace a calliper - overhaul kits are available.

The link below shows generic images of brake calliper pistons/seals:
brake calliper piston Google Search

Feb 08, 2017 | Cars & Trucks

2 Answers

How do I fix a Bake calliper that is leaking either from seals or itis over extended when brakes are applied?

If it's leaking from the piston than why not just replace it with a reman caliper. Unloaded you can get one for 40 - 50 bucks.

Mar 04, 2015 | 1994 Honda Accord

1 Answer

How do you replace front pads

remove the callipers from off the disc rotors. remove the loose pad and use a piston mover to push the inner pad and piston fully back into the calliper .replace the pads and slip calliper back over the disc and re-tension mount bolts
make all spring and plates are replaced in the correct positions
when doing this I open the bleed nipple for the calliper I am working on as I push the piston back. It makes it easier and doesn't overfill the reservoir. When the piston is full back tighten the bleed screw
when the job is done pump the brake pedal several times to adjust the clearance of the pads back onto the disc.

Feb 14, 2015 | Cars & Trucks

1 Answer

I put new calipers and brake pads on f550 2001 and calipers are locked tight. What causes that and how do I fix it

Ok the problem is the amount of oxidised crud that builds up over time, you need to remove the callipers, pads out, and buy a pair of piston removal pliers, heat the callipers in HOT water separate the callipers and pull the pistons out, the dust seals are the first ones, look at them before pulling apart they will be popping out, this causes the callipers to lock up and is dangerous, so remove the pistons, gently take out the dust seals and clean then carefully, then take out the main seal behind the dusty seal, clean that, now get a old tooth brush and some petrol and scrub all the crud out from the grooves, do not use Greece when reassembling as it absorbs water and causes future issues, you may need a dart pint and gently scrape any access crud out of the groves, re assemble in revers order, ps remove the bleed nipple for ease of strip down. use finger to smear brake fluid on to the piston for ease of slipping it in. same as foreplay lol

Dec 28, 2014 | 2001 DPFE15 Ford F550 Truck EGR Pressure...

1 Answer

How do I push the part in the center of the back brake calliper back in? I`ve removed the bolt from the other end.

Hi there,

I believe you're refering to the piston. Place something flat across the piston and use a large c-clamp to SLOWLY compress the piston back to it's retracted position. Be careful to compress it squarely and not off to one side or the other, or you'll be replacing the piston seal too. :) Good luck!

Thanks for your vote!


Aug 08, 2011 | Ford Fairmont Cars & Trucks

1 Answer

2006 ford focus rear brakes

If the piston is stuck out this is due to a seized calliper however a temp Fix is to turn the piston clockwise to force it back in as rear callipers are self releasing so they need to be turned clockwise they will not go stright back without turning. This is due by broken calliper seals although you will temp fix it, It's best to either replace calliper or buy a calliper fixing kit which includes all the seals that need replacing.
Also You will need to Empty the brake fluid out to make it easier to push the piston in it, Then you will need to bleed the whole brake system once fitted back.

Jul 21, 2010 | 2006 Ford Focus

1 Answer

I have a polaris 500 atv after sitting for a couple of days the left front wheel acts like it is locked up. I can back up a few times and then it releases. I cant tell if it is the break or the hub

As it is a atv i expect the brake is binding try removing the brake calliper and checking the brake piston for rust or dirt,gently clean with brass brush dont damage the rubber seal though . Allso try removing the calliper before leaving atv if it sticks with calliper removed may be dodgy bearing in hub.

Jan 07, 2010 | Lego Creator Revvin' Riders, Motorcycles...

1 Answer

Change break pads

for front pads jack and support car remove wheels remove bolts holding calliper [2]remove spring clip pull calliper off remove pads clean housing fit outer pad slowley push calliper piston in using large grips fit inner pad to piston refitcalliper fit bolts refit spring clip can be awkward pump brake pedal until firm check fluid level rear ones are the same but special tool needed to wind calliper pistons back in note make sure brake discs are in good condition first

Dec 30, 2009 | 2000 Volvo S40

1 Answer

Front brakes binding

if pistons can be manually pushed back, then you may have **** in the brake line going to that caliper. a blockage will cause that. the piston seals may be damaged. they are square so when the piston goes out, the seal rocks forward but wants to pull the piston back when pressure is released.don't pull the caliper apart unless you know what your doing. and if you do then i don't need to explain the process.

Jul 14, 2009 | 2004 kawasaki ZX-10R

1 Answer

How to change back brakes? I can't get the brake cylinder to go in.

Do you mean back brake pads or the back brake callipers?
To change pads you need to use a rear brake pads changing tool to screw in the calliper piston or if you are experienced enough you could screw in the calliper with a two mm thick piece of metal sheeting that fits into the grove of the piston.
If you need to replace the whole calliper remove the hand brake cable first and clamp the flexible brake hose remove brake hose, remove the callier with cylinder and then remove the calliper holder. fit new holder pads and locks and the calliper with the piston and the brake hose and the hand brake cable. Bleed the brakes. Mike

Apr 26, 2009 | 2001 Volkswagen Beetle

Not finding what you are looking for?
1990 Yamaha XJ 900 F Logo

Related Topics:

121 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts


Level 2 Expert

314 Answers


Level 3 Expert

1216 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1165 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides