People have mentioned the cleat screws. Also check the screws that hold the SPD mechanism onto the pedal body. I had a very similar problem with SPDs and it turned out that one screw holding the SPD mechanism down had loosened a bit.

after some careful anal ysis i think i figured it out. Because there are big cages around the spring loaded pedal part, when i'm pedaling, it keeps the spring under tension, but when I released that pressure (it only needs to be minor) the pedals flicks back into the cleat and makes a clicking noise. it doesn't seem to be hurting anything, but i think that its about time i got rid of these offensively large pedals.

http://www.gearbikes.com/images/Peda...manoM545DH.jpg

i've got rid of this problem before by making sure the cleats are uber tight on my shoes (incl. thread-lock). if poss bed the cleat into the shoe slightly. it worked on egg-beaters and m520's.

sure it's not a worn thread where the pedal screws into the crank?

good luck

Bingo

I did rebuild my bb and crackety crack went away .... somehow it did the trick.

And so you are sure that none of the screws in you are loose.

I have the same problem w/ my 520's. I am 100% sure it is coming from the shoe. I will go and tighten the bolts cleat bolts and hope it goes away :)

Matt

Holy crap!! Those things are about 2 pounds a piece (I've got'em on my MTB). I can't even imagine the pedal strike you must have.

Not too bad. I lean my body rather than the bike and don't have much issue (knock on wood).