the chain catches on the rear sprocket on the hub, it catches on the side of the gear and makes a clicking sound. I have a half link chain and a 9t rear sprocket. Does the chain just need to stretch or Could there be something wrong elseware?

Sound like you have a tight link somewhere on the chain , find the link(s) and loosen it with a chain tool or bent the frozen link with your hands unit iy move freely .

9 t it's a BMX style right? we have other brands at the lbs , better parts on those..

how tight is the chain?

"plenty tight so it won't fall off" ?
is it noisy when you pedal, too?

checked the rear hub lately? the freewheel will have issues soon, if not already.... and the bearings like to unscrew themselves occasionally... check for excess rear wheel "slop".

when was the last time you lubed the chain?

How does a bearing unscrew itself? Bearings don't have threads.

In cup&cone bearings, the cone bearing race usually have threads.
Depending on direction of rotation, a cone with insufficiently tight locknut can unscrew.

That isn't "the bearing", and it has nothing to do with chain noise.

"9 teeth"... BMX, TINY, over-stressed freehub setup... various wheel bearing configurations seen... they fail quite easily... and the cones back out since the jam nuts never get done right after ANY attempted changes of grease, etc...

The SEALED CARTRIDGE bearings used sometimes are held against a shoulder on the axle, by a nut that is sometimes NOT jammed with a jam nut... those things are a pain to deal with, then toss in some bunged up threads on the axle for SERIOUS hassles....... and the freehubs readily fail on that type also.

the truly sad part is that the BMX people that insist on the 9 tooth freehub setup usually have no idea WHY they want that 9 tooth, except so that they can ride a bike capable of tricks, yet rarely can they DO those tricks... or they saw it on a hero's bike, so it's gotta be great for them...... they then over-tighten the chain tension after it first needs adjustment... the rest of the process is waiting for the hub to grenade.... the BB takes quite a beating too...

there are a few riders that took time to learn about frictional losses, proper chain tensions, and correct bearing adjustment.... a few..... their hubs last much longer!

a 9 tooth freehub hub sells for $80 and up... mostly UP.

look up the word "bearing".

And all that has what to do with chain noise the OP thinks is coming from his chain angle/chain line?

All I'm getting from your rant is that the suspect the OP might be a fool because he has a 9 tooth cog.

over-tighten a single speed freewheel or freehub some time.

get back to me with a recording of what the chain sounded like.... drier the better.

run a long term test of that set-up... see what happens to the rear hub and bottom bracket.
sprocket wear is dramatically accelerated too.

So your first post was about the bearings being too loose, but now you've switched to the bearings being too tight?

zoom

overtighten the CHAIN.

and the bearings can be damaged if either too tight or loose.

if you need experience with bicycles, i'd advise you go find some freebies, then make then work correctly... you seem to lack experience in almost ALL ASPECTS of this field.

post a question if you have one.. quit hijacking threads for your own purposes, ok?

search the archives here for info, read up.

I was a professional bike mechanic up until 2014 and started 25 years earlier. I'm well known on several other forums.

It is hard to tell what sort of advice you are giving out because you don't use complete sentences or talk directly about the issue at hand. Do you think the OP's chain is too tight? Is the hub too tight? Is the hub too loose? Is the chainline off? Do all of those make chains noisy? I'm a smart guy, and I can't tell. Your responses are just essays on things you don't like, rather than explicit diagnoses and advice.

You may know quite a bit about the OPs problem, but your presentation is so scattered that even a guy with a professional background can't tell what you are trying to say.

Consider making your thoughts a bit clearer.

OK, so we've gone from a complaint about lack of clear language to a distracting feud. I suggest abandoning this thread, and putting more helpful input (and yes, including clearer language) on the other post with the same title. Chain clicking while pedaling

Duplicate thread. Closed.

Refer to this thread.
Chain clicking while pedaling

Please ensure all posts are "on topic".