I am really getting stumped by my motor's loss of power and ticking at freeway speeds, typically uphill. I just put in my 2nd JE 10.5 piston. First one cracked. Put my original stock cam back in. Previous Hotcam had 1 extremely worn lobe and rocker. Bike is just getting broken in at 200mi or so and these original problems are surfacing!! Bike has been ridden over 37K miles. I'm running CA 91 premium. A different CDI, pulse generator, ignition coil, new spark plug (cold), new rockers, and a new timing chain. Temp hasn't exceeded 240 yet, but generally around 215. I verified oil flow to head after re-assembly. D&B Mods with 55/158 jets (i think). Sea level to 1200ft Bike starts right up and instantly can remove choke. Idles fine and is generally quite powerful. I can blast it from gear to gear to 75 mph quite quickly. However, it pooters out on the freeway after a few minutes and quite certainly uphill at >65 mph speeds. I have to reduce throttle to just below the knocking. I can skirt the knocking a bit by down shifting into 4th, as if I'm lugging the bike in 5th at 70mph?! These JE's are hurting my wallet as well as other potential part replacements. My latest thoughts on this may be some valve floating. Do springs commonly wear out after this kind of mileage??? I've noticed one other past threader with the similarly hosed righter-most cam lobe and rocker said his valve seats had turned out to be the culprit. Mine appeared fine when it was apart last. Feedback is always appreciated. Thanks in advance.