Intake length plays the same roll as moving the carb closer and further away from the head. Generally, the shorter you make the intake, the more over rev the bike will have. But keep in mind 4 strokes like to have a certain amount of stored volume in the intake track. Usually you would cut an intake about an inch at a time.
Hondas are all about the right combo. In my opinion each bike has 2 it 3 items holding the combo back. Bike #1, the small HRC cam, small carb, pipe are holding it back. Bike #3, I'm not familiar with Quadified, so I can't say if the head is holding it back or not, but the small carb, pipe, and possibly Recluse are. I know the Recluse has its purpose, but as far as making power outside the woods, I'm not a fan of them. Bike #4, we do not use or recommend +3 or any stroker cranks on 06+ motors. They are sprint motors compared to 04-05 motors. The crank, stock head, stock carb, pipe are holding it back.
We do not use HRC cams. All of our heads are more biased to more aggressive cams, with the HC2 being the absolute smallest cam we would use. With our CNC head, a HC2, and the rest if your combo it will make 55 on pump gas easily. Closer to 60 with a CP piston, 208 and FCI intake.
HC2 is the smallest cam we run, that will give some more over the HRC cams. We run at least 42.5 for size on the FCRs. That will gain throughout the power curve, and will yield more over rev. Setting the deck heights to .040 will gain some. We run DASA pipes on 90% of our builds. The Rage head should be just fine, but again I know nothing of Quadified, first I've heard of them so unsure if that head is holding that build back.
