i just finished swapping out the Master Cylinder yesterday and bled the whole system according to the Honda Service Manual. I can't get a hold of this special adjustment tool to adjust the piston / booster gap. Everything is working fine except i hear a "bob" sound when step on the brake pedal.

Anyone who replaced the MC had that problem before? i suspect the "bob" sound came from not adjustting the gap ( maybe the gap is too much that when i step on the brake, the rod hit the piston of the master cylinder )?

Any suggestion and help is appreciated.