Hi,
The sprockets should be identified with either an I or an E. If you are facing the front of the engine, the I (intake) is on your left and the E (exhaust) is on your right. See pic below.
Now, I'm not sure how they can go on 180 degrees off. There should only be one way they can mount.
Let me know. If you can, take a couple of pics of what you are referring to and upload them for me to see.
Take care,
Joe
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Tuesday, January 31st, 2023 AT 9:07 PM