Kawasaki zx 400 have two seized pistons on rear caliper, are these pistons removeable, what is then inside!! freddie

THIS TIP GIVES YOU AN EASY WAY TO WHEEL A MOTORBIKE AROUND IF THE BRAKE CALIPER/S SEIZE & CHEAP SEIZED CALIPER FIXES

Most disc brakes seize due to corrosion, so the piston gets pumped out but cannot return on its own . Sometimes the piston seal gets dislodged with the same effect.

TEMPORARY CURE:-

With a rubber mallet or similar hit the brake calipers sharply on the out-most side where there are 1,2 or 3 round shapes in the cast metal, thereby forcing the brake pistons back a fraction.

BE VERY CAREFUL NOT TO HIT BLEED NIPPLES, BANJO BOLTS OR OTHER PROTRUSIONS AS THEY MAY BEND OR BREAK
If the calipers have opposing pistons ( the caliper looks similar on the inside) then you may have to do the same from the other side with a whack on a piece of wood or similar that passes through the wheel

DO NOT RIDE THE BIKE as the brakes will seize again as soon as they are used

For a permanent remedy completely refurbish or replace the calipers using new parts & fluid

After-market caliper rebuild kits are much cheaper than buying O.E. (original equipment) parts singly - as they are sold
Complete (original manufacturer) calipers for many modern KAWASAKI & SUZUKI bikes can be obtained (unbadged) for a fraction (<1/3) of the cost of O.E. calipers



Ride safe
Bike-Doc

I hope this helps (if so give good feedback please)