At this point in my life (50) I enjoy riding the 250f, I don't get into much trouble, well at least to much. My son competes on a professional level in hillclimbs, I build bikes for him, and I want the most competitive that I can come up with. Like BDI and Stewart I have piles of parts that didn't prove out like I'd hoped, you keep plugging away and hope you hit on something. Like I've said I use the 250 carb on the nitrous bike and the Lectron on the gasser. Personally, for the riding we do, Reed spacers are not in the cards, WE want quick HP and all through the power band. I think spacers are great for trail riders, but wouldn't think they would be good for duners or anybody looking for all out HP. By the way we did use spacers on some of our 125's to pick up a bit of bottom end torque. At the end of the day, I think it depend s on the power curve your looking for, and as an individual you need to tailor it to your needs.