Knocking front forks

[emjaydee]

Hi,  I recently removed the front forks so I could spray them which turned out really well, very please with them....but after I refitted them, the front end knocks when I go over bumps, large or small.
All the bolt are tight and I've tried altering the adjustment on top of the forks.
Any ideas what it could be?
Many Thanks

[alan sherman]

The forks could be bottoming out at either end of travel.  Possibly low on fork oil.

[emjaydee]

Thanks for the reply.
It doesn't look like it's bottoming out. It was ok before I removed the forks and I didn't see any oil leaking out.
Does having the forks upside down while spraying them effect them?
 
Is there something I could of upset by removing them?

[bandit]

Make sure the front wheel spins freely if the brake pads are not releasing in the calipers can cause a knocking noise.

[scoobie_paws]

Worth checking head bearings too. Might have loosened off a bit with forks going in and out

[emjaydee]

Thanks for the advice, I'll check tomorrow and let you know.

[emjaydee]

Worth checking head bearings too. Might have loosened off a bit with forks going in and out

The head bearing nut on top had somehow worked loose, few turns with a spanner and all is good again.
Thanks.

[scoobie_paws]

Worth checking head bearings too. Might have loosened off a bit with forks going in and out

The head bearing nut on top had somehow worked loose, few turns with a spanner and all is good again.
Thanks.

Woohoo I solved a problem for someone..... must treat myself to many beers