Did I read on the forum that the 650 motor actually can deliver more power with the slightly smaller 500 pies? Thr reason I ask is that I had my head done a Memphis Motor Werks, it had smaller stubs installed. I thought at the time it was a mistake. So I put in a regular set. The bike runs awesome after the work done on the head, but I keep wondering. I should just call him, but he has been hard to reach for medical reasons.
If any tuners out there could let me know if there is something to this.
Thanks in advance,