Gents,

My 1991 MC21SE has stock pipes, K&N filters in place of the stock air box, slightly larger main jets, stock slow jets, is running the power jets, has the HRC black box, stock oil pump and runs very strong from mid-range to top end. It's a little rough at idle and low RPMs and is a complete bitch to start but overall runs like crazy.

I have a set of JHa pipes that I have considered putting on it. Based upon your experience, should I put the JHa pipes on or leave it alone since it already runs so well.

Thanks,
Skunkbait