I'm of two minds on this ...
The first point being that its illegal to run HIDs anyway (unless you use special projector housings which are specifically made to use HID bulbs)
But all the "conversion kit" type HIDs are technically illegal. The importers get away with selling them because they are "not for road use, show and offroad use only" ...
And thats a Federal reg, so it applies to all the states ...
So you need to swap it out to pass inspection (if you have it) anyway ...
And if a cop is looking to bust you for the lighting they can anyway (just because its HID), even if you have a high beam.
So legally I don't think you're much more at risk for not having a high beam
On the other hand, you can still have a high beam pretty easily without getting "bi-xenon".
(just for my own curiosity ... why don't you want bi-xenon?)
Search ebay for:
motorcycle HID (hi-low,"hi low",hi-lo,"hi lo","hi/low","hi/lo") -"bi-xenon"
Sort by "lowest price plus shipping"
One of the first hits is
this
I'm prettty sure this is a HID low beam bulb with an attached "normal" halogen element in the high beam position.
They have an 800 number, call to make sure ...
That will fit into a normal bike headlight, and give you a HID low beam (that stays on during both low and high beams) and a halogen element that comes on for high beams only.