Quote:

The bike pulled stronger on top to redline than it did with the prior 158 setup. So far the 160's seem good.




I'm sorry, but I don't believe anyone can feel a one step jet change. That aside, everything you've said and done so far continues to convince me that the problem is the idle circuit. In fact, there's every chance you'll be better with the smaller mains, once the idle is dialed in. It'll take a dyno run to know. You also need to consider that if the temporary lean condition is due solely to the softer springs, eliminating it might burden the idle circuit with a job it wasn't designed to do. It may not be possible to eliminate the mid-throttle hesitation without over-richening the idle and/or mains.

'08 America Blue/White; Custom Headlamps, Custom Lowers, Clearview 20", Bafflectomy