Thats what I expected, the intake valve opens later on the rear cylinder... works in a similar way to exhaust blow down, but instead improves the induction velocity / cylinder fill... the rear cylinder is the stronger of the two,... the front cylinder absorbs a bit more power, but the two cylinders balance out across the 720 degree engine cycle.

The front cylinder is the right hand cylinder ( starboard side )... and the rear cylinder is the left hand cylinder ( port side ) when viewed from sitting in the cockpit... that's how its described in the RCM Saito 4 stroke handbook for the saito twin cylinder engines...it has some useful information, but unfortunately that book was published before the inline twins were released... I did see someone uploaded a scanned copy in pdf format, but I don't recall where it was posted... it only really matters to the person standing in front or from behind, as long as you have the cylinder parts relationship understood, thats all that really matters.