BMX freewheel

There is a problem with freewheel on my BMX. On each pedal rotation it makes a "knock" sound. Rotating pedals not so agressive makes no sound. What is wrong?

P. S. Sorry for my bad english

It might not be comming from your free wheel. Look around to see if it i s comming from any where else, while pedaling slowly.

There is no such problem while pedaling slowly

I think doing pedal kick on BMX can cause to freewheel death... Am i wrong?

I'll try to install my rear wheel onto another bike. If it will make noise - problem is in my freewheel. If not - I gotta check chain and... a... hm... a thing on which crancks are placed

It can also be the bottom bracket, pedals, crank arm or arms. There are lots of moving parts to check. Start by making sure everything is adjusted right and tightened down good.

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Just Pedal