Unlike high-lift, moderate duration cams that preserve low-end power by retaining decent static compression, long duration, moderate lift cams have less static compression at lower rpm's because of the longer period when the intake valve is open on the compression stroke. To overcome the loss of static compression, one needs to increase the compression ratio. Long duration, moderate lift cams have valve-control (less violent valve movements) and port velocity (better cylinder filling) advantages over high-lift, moderate duration cams at higher rpms though. In any case, that's the the way I remember the theory being explained.
In the right motor, the 125-90 may be gutless until 6k or so, but it should have long legs -- pulling strong to or past redline. Interested to see if my hunch about where it makes power is right.
