Might have to grind the tips off. Same quality as the rest of the parts....My instructions state this, and you can find posts on what to do if you search...
What brand of kit
ThatsDax sells a .81 small 10 tooth sprocket.
This sprocket will work on wall-e-world 1 to 3 speed BMX chain. You will need two BMX chains.
This is a total replacement of a cheap small sprocket and a cheap chain.
I bought a Kings motors kit and fought the chain until I repkaced everything.
You need to contour the old sprocket to match your chain if you just want to fix the Chinese junk that came with your kit.
I tried this and did not like the fuss and bother.
You will spend as much on a dremel or files as replacing the chain. LOL
I agree with spad the kit chain is junk. I replaced my chain with #41 chain. Much better, stronger, cheaper. $15. for 10 feet at Tractor Supply Co. I dont know where you are since its not listed but possibly a small engine shop would have it to....