TGB Blade 250 ATV Quad Service Repair Manual, Page 191Get this manual
16REAR BRAKEREAR WHEELREAR CUSHION Measure the outer diameter of the pistonReplace the piston if its measured value exceeds allowable limitAllowable limit: Hand brake 13.954 mm Foot brake 15.850 mm
Master Cylinder Assembly
Caution
It is necessary to replace the whole set comprising piston, spring, piston cup, and cir clip0 Make sure there is no dust on all components before assemblingApply clean brake fluid to the piston cup, and then install the cup onto the pistonInstall the larger end of the spring onto the master cylinderThe master cup's cavity should be face inside of master cylinder when installing the master cupInstall the cir clip0 0