guys..small mishap in garage,,,long story short bike was dropped on right side while a tire was being changed..after I got tire on I have discovered I must squeeze front brake lever several times till I have brake..2008 with abs....seen no damage to master cylinder and no leaks on floor or rims anywhere,,,i decided maybe time to change fluid...did this on bike before never had problem.

bled brakes and pump lever and have full brake,,let go of brake and several seconds later...NOTHING...any ideas...

Ken

Did it do this after the accident BEFORE you bled the brakes?  I think you need to bleed them again.

Bleed, bleed, bleed

Bent disc. 

Very possibly..

Bent disc.

Yeah, that could push the pads back in.  But if the rotor were bent the brakes would pulse horribly... no mention of that.

pinched brake line from fall?

Air in system,keep bleeding.Recommend Murphs,speed bleeders.One man successful operation.

Air in system,keep bleeding.Recommend Murphs,speed bleeders.One man successful operation.

+1 on Speed Bleeder. I will have fresh brake fluid in the system after every tire change now because it's crazy easy to bleed.

guys..small mishap in garage,,,long story short bike was dropped on right side while a tire was being changed..after I got tire on I have discovered I must squeeze front brake lever several times till I have brake..2008 with abs....seen no damage to master cylinder and no leaks on floor or rims anywhere,,,i decided maybe time to change fluid...did this on bike before never had problem.

bled brakes and pump lever and have full brake,,let go of brake and several seconds later...NOTHING...any ideas...

Ken

If the brake front brake lever struck the ground it could have damaged the internal piston somehow?  Maybe?  No fluid leaking from that area?

If it only goes away when you roll it, it's the rotor. If it goes away sitting still, it's air in the system.

http://youtu.be/f4zyjLyBp64

Couple of things You can do to diagnose things. First take a small piece of scrap steel, approximately the same thickness as the rotor, remove the suspected caliper and slide the scrap steel between the pads in the same spot the rotor sits. Use a zip tie or some wire to hang the caliper in a way that the hoses aren't stressed, and pump the brake until the pads clamp the steel. If the symptom is gone, then the rotor is springing the pads back into the caliper bore.

Another thing You can do requires a dial indicator. Clamp or bolt the indicator on the lower fork, and do a runout check on the rotor. Specs should be in the service manual.

This guy has a good video

https://youtu.be/2GaYqJYhCB0

guys..small mishap in garage,,,long story short bike was dropped on right side while a tire was being changed..after I got tire on I have discovered I must squeeze front brake lever several times till I have brake..2008 with abs....seen no damage to master cylinder and no leaks on floor or rims anywhere,,,i decided maybe time to change fluid...did this on bike before never had problem.

bled brakes and pump lever and have full brake,,let go of brake and several seconds later...NOTHING...any ideas...

Ken

Sooooo.  Anybody else feel like they're talking to themselves?  What's up Ken?

Usually we see this as a user's first post, on the day the user joined the forum. But this gentleman joined in March and did not post until Sep.. ? Maybe he got his answer.

A lot more people read forums than post to them so maybe the silence is the norm. and the one post was the oddity?

Brian

Hey guys, I dropped my bike and now it's broken.  First post!
Hard to come back, no matter how bad you try to help.

pinched brake line from fall?

Stick to your keyboard. You suck at diagnosis. Lol!

Couple of things You can do to diagnose things. First take a small piece of scrap steel, approximately the same thickness as the rotor, remove the suspected caliper and slide the scrap steel between the pads in the same spot the rotor sits. Use a zip tie or some wire to hang the caliper in a way that the hoses aren't stressed, and pump the brake until the pads clamp the steel. If the symptom is gone, then the rotor is springing the pads back into the caliper bore.

Another thing You can do requires a dial indicator. Clamp or bolt the indicator on the lower fork, and do a runout check on the rotor. Specs should be in the service manual.

This guy has a good video

https://youtu.be/2GaYqJYhCB0

  You too.

freakin' harley riders....

If the fall caused contact to one of the rotors, it is at least possible that that rotor was damaged, or warped. As a wheel rotates, the warped rotor pushes the calipers back apart, drastically reducing, or eliminating, braking ability in that wheel. 

I know this because I did the same thing myself. It was VERY surprising how easily the rotors could be damaged. I warped a rotor while breaking a bead in order to change a tire. Cost me big bucks for a new set of front rotors. I learned a very expensive lesson. Heres hoping the OP's problem can be fixed with less expense.