pulls to right when braking ?

Let's get down to the finer points of your front brakes. When your brakes pull to the right it usually means the right front brake is working and something is amiss with the left front. The LF (lest front) slider pins may be rusty or stuck. The brake caliper piston isn't working or the the left front brake hose is plugged.

After you've checked all that stuff make sure the slider pins and brake caliper is working freely on the right side. The hose will be OK but I'm concerned about the other two things.

Make darn sure all four of the front brake pads have worn equally. Bent or crapped - up slider pins or sticking caliper pistons will cause uneven wear.

Have the following check

(1) Mismatched or uneven tires

(2) Broken or sagging spring

(3) Front wheel alignment incorrect

(4)Front brakes dragging

if it only does it when you brake then you must have a caliper hanging up.

because your left wheel is not breaking. get it checked.