New in box system for 02-09 VFR800, conical end can design. Sold my ABS 06 so didn't need the extra system. I was going to choose between the two. I have one carbon and one in aluminum. Carbon system is conical end can design, still in box. $700, plus shipping. The Aluminum is $550 plus shipping. Both are new in box systems. Paypal accepted. I am trying out a new throttle tube on my 06 non- ABS that is supposed to reduce the throttle response/jerk, will let you know how it goes. Send me a PM if your interested in the Leo's. Can be shipped UPS inside US for $30, and EMS to Europe for $80.
Not to diss your pricing, but I had just ordered the Aluminum SBK conicals (gorgeous) from Nice Cycle for $529. (Carbons available for $729.) Entering DSC-5 will get you 5% off, shipping is $17.09. ($520.54 complete. Thought that was an incredible deal.
Hate to say it, Kia: If throttle jerking/surging are an issue then the problem is much more likely to be a mapping problem with poor fuel/air than it is a throttle tube. Which means you're on the right track with exhaust replacement. So you may want to keep one of them and purchase a PCIII and a dyno tune with the proceeds from the other. I suspect that will cure what you're describing, much more so than a new throttle tube.