Just received a rear magtek that I purchased. The sprocket that came with it was well worn. I have another that I've been waiting for a reason to install. It's been a very long time since I changed a sprocket and that was on a Yamaha so excuse the stupid questions coming.

The sprocket I took off has threaded lugs (?) that seem to be pressed into the sprocket but the new one doesn't. Are these removeable or am I missing something?

Thanks for any insight you guys have for me.
Don