I recently bought a '99 XL1200C from the local HD dealer. It came with the stock pipes on, but I suspect that the previous owner did the stage 1, and just replaced the stock exhaust when he traded it in. Is there an easy way for me to tell, or should i just take it in and have them look at it. On the air cleaner, it looks like the backing plate is different, as there isn't any plastic touching the heads behind where the air cleaner starts. (SE kit / backing plate? I know it's flat and sits inside the metal housing) Mainly I'm wanting to know if it was rejetted.